JPH04310537A - Infrared absorbing glass - Google Patents
Infrared absorbing glassInfo
- Publication number
- JPH04310537A JPH04310537A JP10318591A JP10318591A JPH04310537A JP H04310537 A JPH04310537 A JP H04310537A JP 10318591 A JP10318591 A JP 10318591A JP 10318591 A JP10318591 A JP 10318591A JP H04310537 A JPH04310537 A JP H04310537A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- infrared absorbing
- weather resistance
- absorbing glass
- linear expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011521 glass Substances 0.000 title claims abstract description 52
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 claims abstract description 10
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 claims abstract description 10
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims abstract description 9
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 6
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 6
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 6
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 6
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 6
- 229910000272 alkali metal oxide Inorganic materials 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 229910052700 potassium Inorganic materials 0.000 claims description 3
- NOTVAPJNGZMVSD-UHFFFAOYSA-N potassium monoxide Inorganic materials [K]O[K] NOTVAPJNGZMVSD-UHFFFAOYSA-N 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052593 corundum Inorganic materials 0.000 abstract description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract description 5
- 235000014676 Phragmites communis Nutrition 0.000 description 12
- 230000000694 effects Effects 0.000 description 8
- 239000003513 alkali Substances 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000010828 elution Methods 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 6
- 229910017061 Fe Co Inorganic materials 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000005368 silicate glass Substances 0.000 description 3
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 2
- 229910052916 barium silicate Inorganic materials 0.000 description 2
- HMOQPOVBDRFNIU-UHFFFAOYSA-N barium(2+);dioxido(oxo)silane Chemical compound [Ba+2].[O-][Si]([O-])=O HMOQPOVBDRFNIU-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000004031 devitrification Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910017368 Fe3 O4 Inorganic materials 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004017 vitrification Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Glass Compositions (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、赤外線吸収ガラスに関
し、より具体的には、Ｆｅ−Ｃｏ系合金からなる磁性線
材を用いた大電流負荷対応型リ−ドスイッチを封入する
のに好適な赤外線吸収ガラスに関するものである。[Industrial Application Field] The present invention relates to an infrared absorbing glass, and more specifically to an infrared absorbing glass suitable for enclosing a reed switch compatible with large current loads using a magnetic wire made of an Fe-Co alloy. It relates to infrared absorbing glass.
【０００２】0002
【従来の技術】リードスイッチは、対向する磁性線材か
らなる接点と、これを封入するガラス管から構成され、
ガラス管の外側から磁界を与えることによって、接点の
開閉動作が行われるものである。磁性線材のガラス管へ
の封入は、不活性ガス、還元ガスあるいは真空下におい
て、ガラス管内部に磁性線材を挿入した状態でガラス管
の両端を加熱し、密封することによって行われる。その
ためこの加熱作業には、上記の雰囲気下において使用可
能な熱源、例えば金メッキ反射板で集光された石英−ヨ
ウ素ランプを用いた赤外線放射型熱源が利用され、この
ような事情からリードスイッチ用ガラスには、赤外線吸
収能力を備えていることが要求される。[Prior Art] A reed switch is composed of opposing contacts made of magnetic wires and a glass tube enclosing them.
The contacts are opened and closed by applying a magnetic field from outside the glass tube. Enclosing the magnetic wire into the glass tube is carried out by heating both ends of the glass tube and sealing them with the magnetic wire inserted inside the glass tube under an inert gas, reducing gas, or vacuum. Therefore, for this heating work, a heat source that can be used in the above atmosphere is used, such as an infrared radiation heat source using a quartz-iodine lamp whose light is focused by a gold-plated reflector. is required to have infrared absorption ability.
【０００３】ところでリ−ドスイッチが開閉できる負荷
容量は、主にそこに用いられる磁性線材の組成の制限を
受け、従来より一般に用いられているＦｅ−Ｎｉ系合金
からなる磁性線材で開閉できる負荷の容量は７０Ｗ（１
００Ｖ−０．７Ａ）程度が限度である。However, the load capacity that can be opened and closed by a reed switch is mainly limited by the composition of the magnetic wire used therein. The capacity of is 70W (1
00V-0.7A) is the limit.
【０００４】しかしながら近年種々の技術の進歩に伴い
、あるいは、自動化を進める上で、リ−ドスイッチで１
００Ｗ（１００Ｖ−１Ａ）以上の家庭電化製品や、ロボ
ットのモ−タ−等を直接開閉する要求が増えつつある。
これらの大電流負荷対応型リ−ドスイッチに使用される
磁性線材には、電気抵抗値が小さいこと、キュリ−点が
高いこと、熱伝導率が大きいことが要求され、そのため
従来のＦｅ−Ｎｉ系合金からなる磁性線材に代わって、
上記各特性を満足する磁性線材、例えばＦｅ−Ｃｏ系合
金からなる磁性線材を使用することが試みられている。[0004] However, in recent years, with the advancement of various technologies or in order to promote automation, reed switches have become more and more
There is an increasing demand for direct opening/closing of home appliances of 00W (100V-1A) or higher, robot motors, and the like. The magnetic wire used in these large current load compatible reed switches is required to have a low electrical resistance, a high Curie point, and a high thermal conductivity. Instead of magnetic wire made of alloys,
Attempts have been made to use magnetic wires that satisfy the above characteristics, such as magnetic wires made of Fe--Co alloys.
【０００５】[0005]
【発明が解決しようする課題】ところがＦｅ−Ｃｏ系合
金は、３０〜３８０℃の温度範囲における線膨張係数が
１３０〜１４５×１０−７／℃程度であり、そのためこ
のような合金からなる磁性線材を従来から提案されてい
るリードスイッチ用ガラス、例えば特公昭５３−２２８
３０号公報に開示されているようなＢａＯ、Ａｌ２ Ｏ
３ 、ＳｉＯ２ 、Ｋ２Ｏ、Ｎａ２ Ｏ、ＦｅＯを主成
分とし、線膨張係数が１１８〜１１９×１０−７／℃程
度のバリウムシリケ−トガラスで封入すると、両者の線
膨張係数の差が大きいためにガラスが割れたり、気密性
が損なわれやすい。[Problems to be Solved by the Invention] However, Fe-Co alloys have linear expansion coefficients of approximately 130 to 145 x 10-7/°C in the temperature range of 30 to 380°C, and therefore magnetic wires made of such alloys are Glasses for reed switches that have been proposed in the past, such as Japanese Patent Publication No. 53-228
BaO, Al2O as disclosed in Publication No. 30
3. When sealed with barium silicate glass, which contains SiO2, K2O, Na2O, and FeO as main components and has a linear expansion coefficient of about 118 to 119 x 10-7/℃, the glass Easy to crack or lose airtightness.
【０００６】このようなバリウムシリケ−トガラスの線
膨張係数を大きくするためには、アルカリ金属酸化物、
すなわちＲ２ Ｏ（ただしＲはＬｉ、Ｎａ、Ｋを表す）
の含有量を増やせば良いが、単にＲ２ Ｏ量を増やすだ
けでは、ガラスの体積固有抵抗値を大きく下げると共に
、耐候性の著しい劣化をまねく。このことは、リ−ドス
イッチの電気特性、経時変化等、リ−ドスイッチ機能お
よび信頼性の大幅な低下につながるために好ましくない
。In order to increase the linear expansion coefficient of such barium silicate glass, alkali metal oxides,
That is, R2 O (where R represents Li, Na, K)
It is possible to increase the content of R2O, but simply increasing the amount of R2O greatly lowers the volume resistivity of the glass and causes significant deterioration of weather resistance. This is undesirable because it leads to a significant deterioration in the electrical characteristics of the reed switch, changes over time, etc., and the reed switch function and reliability.
【０００７】本発明は、上記事情に鑑みなされたもので
あり、３０〜３８０℃の温度範囲において１２０〜１４
０×１０−７／℃の線膨張係数を有し、しかも大きい体
積固有抵抗値と優れた耐候性を有するため、大電流負荷
対応型リ−ドスイッチを良好に封入することが可能な赤
外線吸収ガラスを提供することを目的とするものである
。[0007] The present invention was made in view of the above-mentioned circumstances.
It has a coefficient of linear expansion of 0 x 10-7/℃, a large specific volume resistance value, and excellent weather resistance, making it possible to effectively encapsulate reed switches that can handle large current loads. The purpose is to provide glass.
【０００８】[0008]
【課題を解決するための手段】本発明者は、アルカリシ
リケ−トガラスを基本とし、Ｒ２ Ｏを比較的多量に含
有させながらも、Ａｌ２ Ｏ３ とＺｎＯを適量含有さ
せることによって優れた耐候性を有し、しかも所望の線
膨張係数、体積固有抵抗値を有する赤外線吸収ガラスが
得られることを見い出し、本発明として提案するもので
ある。[Means for Solving the Problems] The present inventor has developed a glass that is based on alkali silicate glass and has excellent weather resistance by containing a relatively large amount of R2O and appropriate amounts of Al2O3 and ZnO. In addition, the inventors have discovered that an infrared absorbing glass having a desired linear expansion coefficient and volume resistivity can be obtained, and this is proposed as the present invention.
【０００９】すなわち本発明の赤外線吸収ガラスは、重
量百分率で、ＳｉＯ２ ４０．０〜６６．０％、Ａ
ｌ２ Ｏ３ ５．４〜１５．０％、ＺｎＯ １．
０〜２１．０％、Ｌｉ２ Ｏ ０〜１０．０％、Ｎａ
２ Ｏ＋Ｋ２ Ｏ ７．０〜３１．０％、Ｆｅ３ Ｏ
４ ０．１〜１０．０％の組成を有し、３０〜３８
０℃の温度範囲における線膨張係数が１２０〜１４０×
１０−７／℃、温度１５０℃における体積固有抵抗値が
１０９ Ω−ｃｍ以上であり、優れた耐候性を有するこ
とを特徴とする。That is, the infrared absorbing glass of the present invention contains 40.0 to 66.0% SiO2, A
l2 O3 5.4-15.0%, ZnO 1.
0-21.0%, Li2O 0-10.0%, Na
2 O+K2 O 7.0-31.0%, Fe3 O
4 has a composition of 0.1 to 10.0%, and has a composition of 30 to 38
Linear expansion coefficient in the temperature range of 0°C is 120 to 140×
It is characterized by having a volume resistivity of 109 Ω-cm or more at a temperature of 10-7/°C and a temperature of 150°C, and excellent weather resistance.
【００１０】また本発明の赤外線吸収ガラスは、より好
ましくは、重量百分率で、ＳｉＯ２４５．０〜６５．０
％、Ａｌ２ Ｏ３ ５．５〜１３．０％、ＺｎＯ
７．５〜２０．０％、Ｌｉ２ Ｏ ０．３〜８．０
％、Ｎａ２ Ｏ＋Ｋ２ Ｏ ８．０〜３０．０％、Ｆ
ｅ３ Ｏ４ ０．５〜９．０％の組成を有すること
を特徴とする。[0010] The infrared absorbing glass of the present invention more preferably has SiO245.0 to 65.0 in weight percentage.
%, Al2O3 5.5-13.0%, ZnO
7.5-20.0%, Li2O 0.3-8.0
%, Na2O+K2O 8.0-30.0%, F
It is characterized by having a composition of e3 O4 0.5 to 9.0%.
【００１１】さらに本発明においては、Ｌｉ２ Ｏ、Ｎ
ａ２ Ｏ、Ｋ２ Ｏのうちの１成分の含有量が、単独で
Ｒ２ Ｏ（ただしＲは、Ｌｉ、Ｎａ、Ｋを示す）の総量
の８０％を越えないことを特徴とする。Furthermore, in the present invention, Li2O, N
It is characterized in that the content of one component among a2 O and K2 O alone does not exceed 80% of the total amount of R2 O (where R represents Li, Na, and K).
【００１２】0012
【作用】本発明の赤外線吸収ガラスを構成する各成分の
含有量を上記のように限定した理由は以下のとおりであ
る。[Operation] The reason for limiting the content of each component constituting the infrared absorbing glass of the present invention as described above is as follows.
【００１３】ＳｉＯ２ は、ガラスの骨格を構成するた
めに必要な主成分であるが、６６．０％より多いと、線
膨張係数が低くなりすぎると共に溶解性が悪化し、４０
．０％より少ないと、耐候性が悪化する。[0013] SiO2 is a main component necessary to constitute the skeleton of glass, but if it exceeds 66.0%, the coefficient of linear expansion becomes too low and the solubility deteriorates, resulting in
．． If it is less than 0%, weather resistance will deteriorate.
【００１４】Ａｌ２ Ｏ３ は、ガラスの耐候性を向上
するのに著しい効果があるが、１５．０％を多いとガラ
スの溶解が困難になり、５．４％より少ないと、上記の
効果が得られない。[0014]Al2O3 has a remarkable effect on improving the weather resistance of glass, but if it exceeds 15.0%, it becomes difficult to melt the glass, and if it is less than 5.4%, the above effect cannot be obtained. I can't do it.
【００１５】ＺｎＯは、ガラスの粘度を低下すると共に
、ガラスの耐候性を向上させる効果を有するが、２１．
０％より多いと、ガラスの失透性が増し、均質なガラス
の製造が困難になり、１．０％より少ないと、上記効果
が得られない。ZnO has the effect of lowering the viscosity of glass and improving the weather resistance of glass, but 21.
When it is more than 0%, the devitrification of the glass increases and it becomes difficult to produce homogeneous glass, and when it is less than 1.0%, the above effects cannot be obtained.
【００１６】Ｌｉ２ Ｏは、アルカリ金属酸化物である
が、体積固有抵抗値を高く維持しつつ、ガラスの線膨張
係数を大きくする効果を有している。しかしながら１０
．０％より多いと、ガラスの耐候性、及び失透性が悪化
するため好ましくない。Li2O is an alkali metal oxide, and has the effect of increasing the linear expansion coefficient of glass while maintaining a high volume resistivity value. However, 10
．． If it is more than 0%, the weather resistance and devitrification properties of the glass will deteriorate, which is not preferable.
【００１７】Ｎａ２ Ｏ及び、Ｋ２ Ｏは、Ｌｉ２ Ｏ
と同様に、ガラスの線膨張係数を大きくすると共に、ガ
ラスの溶融を促進する成分であるが、Ｎａ２ ＯとＫ２
Ｏが、合量で３１．０％を越えると、ガラスの耐候性
と体積固有抵抗値が著しく悪化し、７．０％より少ない
と、所定の線膨張係数が得られないと共に、ガラスの溶
融が困難になる。[0017] Na2O and K2O are Li2O
Similarly, Na2O and K2 are components that increase the coefficient of linear expansion of glass and promote melting of glass.
If the total amount of O exceeds 31.0%, the weather resistance and volume resistivity of the glass will deteriorate significantly, and if it is less than 7.0%, the prescribed coefficient of linear expansion will not be obtained and the melting of the glass will deteriorate. becomes difficult.
【００１８】またＬｉ２ Ｏ、Ｎａ２ Ｏ、Ｋ２ Ｏの
うちの１成分の含有量が、単独でＲ２ Ｏの総量の８０
％を越えない場合、混合アルカリ効果の作用によって、
より優れた耐候性と高い体積固有抵抗値を得ることが可
能である。Furthermore, the content of one of Li2O, Na2O, and K2O alone is 80% of the total amount of R2O.
If it does not exceed %, due to the action of mixed alkali effect,
It is possible to obtain better weather resistance and higher volume resistivity.
【００１９】Ｆｅ３ Ｏ４ は、ガラスに赤外線吸収能
力を持たせるために使用されるが、１０．０％より多い
と、ガラス化が困難となり、０．１％より少ないと、上
記効果が得られない。[0019] Fe3O4 is used to impart infrared absorption ability to glass, but if it is more than 10.0%, vitrification becomes difficult, and if it is less than 0.1%, the above effect cannot be obtained. .
【００２０】尚、本発明のガラスにおいては、ガラスの
粘度の調整や失透性を改善する目的で、Ｆ、ＰｂＯ、Ｓ
ｒＯ、ＢａＯ、Ｂ２ Ｏ３ 等の各成分を１０．０％ま
で添加することが可能である。[0020] In the glass of the present invention, F, PbO, S
It is possible to add up to 10.0% of each component such as rO, BaO, and B2O3.
【００２１】[0021]
【実施例】次に本発明の赤外線吸収ガラスを実施例に基
づいて詳細に説明する。EXAMPLES Next, the infrared absorbing glass of the present invention will be explained in detail based on examples.
【００２２】表１は、本発明の赤外線吸収ガラスの実施
例（試料Ｎｏ．１〜６）および比較例（試料Ｎｏ．７〜
９）の組成と特性を示すものである。Table 1 shows examples (sample Nos. 1 to 6) and comparative examples (sample Nos. 7 to 6) of infrared absorbing glasses of the present invention.
9) shows the composition and characteristics of.
【００２３】[0023]
【表１】[Table 1]
【００２４】表に示したＮｏ．１〜９の各試料は、次の
ようにして調製した。[0024] No. shown in the table. Each of samples 1 to 9 was prepared as follows.
【００２５】まず表に示す組成になるようにガラス原料
を調合し、還元剤として木粉を添加した後、白金坩堝を
用いて１５００℃で４時間溶解した。溶解後、融液をカ
−ボン板上に流しだし、アニ−ルすることによって各ガ
ラス試料を作製し、それらの３０〜３８０℃の温度範囲
における線膨張係数、アルカリ溶出量、温度１５０℃に
おける体積固有抵抗値、及び赤外線透過率を測定し、各
特性を表に示した。[0025] First, glass raw materials were prepared to have the composition shown in the table, wood flour was added as a reducing agent, and then melted at 1500°C for 4 hours using a platinum crucible. After melting, each glass sample was prepared by pouring the melt onto a carbon plate and annealing. The volume resistivity value and infrared transmittance were measured, and each characteristic is shown in the table.
【００２６】表から明らかなように、本発明の実施例で
あるＮｏ．１〜６の各試料は、線膨張係数が、１２１．
５〜１３５．８×１０−７／℃であり、Ｆｅ−Ｃｏ系合
金のそれと近似しており、アルカリ溶出量が０．９６ｍ
ｇ未満と優れた耐候性を有していた。また体積固有抵抗
値が１０９．３ Ω−ｃｍ以上と高く、しかも赤外線透
過率が３．８％以下であるため、高い赤外線吸収能力を
有していることが理解できる。As is clear from the table, No. 1, which is an example of the present invention, Each of samples 1 to 6 has a linear expansion coefficient of 121.
5 to 135.8 x 10-7/℃, which is similar to that of Fe-Co alloy, and the amount of alkali elution is 0.96 m
It had excellent weather resistance. Furthermore, since the volume resistivity value is as high as 109.3 Ω-cm or more, and the infrared transmittance is 3.8% or less, it can be understood that it has a high infrared absorption ability.
【００２７】それに対し比較例であるＮｏ．７の試料は
、Ａｌ２ Ｏ３ の含有量が４．５％、Ｎｏ．８の試料
は、ＺｎＯの含有量が０．５％と少ないため、アルカリ
溶出量が１．１０ｍｇ以上と高く、耐候性に劣るものと
判断される。さらにＮｏ．９の試料は、Ｆｅ３ Ｏ４
の含有量が０．０５％と少ないため、赤外線透過率が９
０．２％と高く、赤外線吸収能力が非常に低いことが理
解できる。On the other hand, the comparative example No. Sample No. 7 has an Al2O3 content of 4.5%. Sample No. 8 has a low ZnO content of 0.5%, so the alkali elution amount is as high as 1.10 mg or more, and it is judged that the weather resistance is poor. Furthermore, No. Sample 9 is Fe3 O4
Because the content is as low as 0.05%, the infrared transmittance is 9.
It can be seen that the infrared absorbing ability is very low, which is as high as 0.2%.
【００２８】尚、表中の線膨張係数は、自記示差熱膨張
計で、３０〜３８０℃の温度範囲における平均線膨張係
数を測定したものである。The linear expansion coefficients in the table are the average linear expansion coefficients measured in the temperature range of 30 to 380° C. using a self-recording differential thermal dilatometer.
【００２９】またアルカリ溶出量は、耐候性を判断する
ために行ったものであり、ＪＩＳＲ３５０２に基づくア
ルカリ溶出試験によって測定した。すなわちガラス表面
の劣化は、空気中の水分の作用のよってガラス中のアル
カリが表面に析出して、炭酸塩や水酸化物などの反応生
成物を形成することで進むものであり、アルカリ溶出試
験でアルカリ溶出量が多いガラスほど耐候性に劣り、逆
にアルカリ溶出量の少ないガラスほど耐候性に優れてい
ると判断される。電子部品用のガラスとして、このよう
な表面の劣化は、絶縁抵抗値を下げ、そして、リ−ドス
イッチの特性を悪化させるので、ガラスのアルカリ溶出
量が１．０ｍｇ未満であるような耐候性が要求される。The amount of alkali elution was carried out to judge the weather resistance, and was measured by an alkali elution test based on JISR3502. In other words, glass surface deterioration progresses as alkalis in the glass precipitate on the surface due to the action of moisture in the air, forming reaction products such as carbonates and hydroxides. It is judged that the glass with a larger amount of alkali elution has inferior weather resistance, and conversely, the glass with a smaller amount of alkali elution has better weather resistance. As glass for electronic components, such surface deterioration lowers the insulation resistance value and deteriorates the characteristics of reed switches. is required.
【００３０】体積固有抵抗値は、ＡＳＴＭ Ｃ６５７
−７２に準じた試験法によって測定した値である。電子
部品用のガラスには、十分な絶縁性を得るために、１５
０℃における体積固有抵抗値は、１０９ Ω−ｃｍ以上
が要求される。[0030]The volume resistivity value is determined according to ASTM C657.
This is a value measured by a test method based on -72. In order to obtain sufficient insulation properties, glass for electronic components has a rating of 15
The volume resistivity value at 0°C is required to be 109 Ω-cm or more.
【００３１】赤外線透過率は、ガラスを厚さ１ｍｍの板
状に加工し、次いでその両面を鏡面研磨した後、これを
分光光度計を用いて波長１０５０ｎｍにおける透過率を
測定したものである。リードスイッチを作製する際に、
効率良く封着を行うためには、赤外線透過率が１０％以
下であることが必要である。The infrared transmittance was measured by processing glass into a plate with a thickness of 1 mm, mirror-polishing both sides of the plate, and then measuring the transmittance at a wavelength of 1050 nm using a spectrophotometer. When making a reed switch,
In order to seal efficiently, it is necessary that the infrared transmittance is 10% or less.
【００３２】[0032]
【発明の効果】以上のように本発明の赤外線吸収ガラス
は、Ｆｅ−Ｃｏ系合金からなる磁性線材との封着に適し
た１２０〜１４０×１０−７／℃の線熱膨張係数を有し
、１５０℃における体積固有抵抗値が１０９ Ω−ｃｍ
以上であり、しかも優れた耐候性を有するため、高い信
頼性が要求される電子部品用等の大電流負荷型リ−ドス
イッチ用ガラスとして好適である。Effects of the Invention As described above, the infrared absorbing glass of the present invention has a linear thermal expansion coefficient of 120 to 140 x 10-7/°C, which is suitable for sealing with a magnetic wire made of an Fe-Co alloy. , the volume resistivity value at 150°C is 109 Ω-cm
In addition, since the glass has excellent weather resistance, it is suitable as a glass for large current load type reed switches for electronic components, etc., which require high reliability.
Claims (3)
０〜６６．０％、Ａｌ２ Ｏ３５．４〜１５．０％、Ｚ
ｎＯ １．０〜２１．０％、Ｌｉ２ Ｏ ０〜１０
．０％、Ｎａ２ Ｏ＋Ｋ２ Ｏ ７．０〜３１．０％
、Ｆｅ３ Ｏ４ ０．１〜１０．０％の組成を有し
、３０〜３８０℃の温度範囲における線膨張係数が１２
０〜１４０×１０−７／℃、温度１５０℃における体積
固有抵抗値が１０９ Ω−ｃｍ以上であり、優れた耐候
性を有することを特徴とする赤外線吸収ガラス。Claim 1: SiO2 in weight percentage: 40.
0-66.0%, Al2O35.4-15.0%, Z
nO 1.0-21.0%, Li2O 0-10
．． 0%, Na2O+K2O 7.0-31.0%
, has a composition of 0.1 to 10.0% Fe3O4, and has a linear expansion coefficient of 12 in the temperature range of 30 to 380°C.
An infrared absorbing glass characterized by having a volume resistivity of 109 Ω-cm or more at a temperature of 0 to 140 x 10-7/°C and a temperature of 150°C, and having excellent weather resistance.
０〜６５．０％、Ａｌ２ Ｏ３５．５〜１３．０％、Ｚ
ｎＯ ７．５〜２０．０％、Ｌｉ２ Ｏ ０．３〜
８．０％、Ｎａ２ Ｏ＋Ｋ２ Ｏ ８．０〜３０．０
％、Ｆｅ３ Ｏ４ ０．５〜９．０％の組成を有し
、３０〜３８０℃の温度範囲における線膨張係数が１２
０〜１４０×１０−７／℃、温度１５０℃における体積
固有抵抗値が１０９ Ω−ｃｍ以上であり、優れた耐候
性を有することを特徴とする請求項１の赤外線吸収ガラ
ス。2. In weight percentage, SiO2 45.
0-65.0%, Al2O35.5-13.0%, Z
nO 7.5-20.0%, Li2O 0.3-
8.0%, Na2O+K2O 8.0-30.0
%, Fe3O4 0.5-9.0%, and the linear expansion coefficient in the temperature range of 30-380℃ is 12
The infrared absorbing glass according to claim 1, having a volume resistivity of 109 Ω-cm or more at a temperature of 0 to 140 x 10-7/°C and a temperature of 150°C, and having excellent weather resistance.
うちの１成分の含有量が、単独でＲ２ Ｏ（ただしＲは
、Ｌｉ、Ｎａ、Ｋを示す）の総量の８０％を越えないこ
とを特徴とする請求項１または２の赤外線吸収ガラス。[Claim 3] The content of one component among Li2O, Na2O, and K2O alone does not exceed 80% of the total amount of R2O (where R represents Li, Na, and K). The infrared absorbing glass according to claim 1 or 2, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3103185A JPH08714B2 (en) | 1991-04-08 | 1991-04-08 | Infrared absorbing glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3103185A JPH08714B2 (en) | 1991-04-08 | 1991-04-08 | Infrared absorbing glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04310537A true JPH04310537A (en) | 1992-11-02 |
| JPH08714B2 JPH08714B2 (en) | 1996-01-10 |
Family
ID=14347458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3103185A Expired - Lifetime JPH08714B2 (en) | 1991-04-08 | 1991-04-08 | Infrared absorbing glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08714B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001016042A1 (en) * | 1998-06-24 | 2001-03-08 | Nippon Electric Glass Co., Ltd. | Infrared absorbing glass for reed switch |
| JP2004067460A (en) * | 2002-08-07 | 2004-03-04 | Central Glass Co Ltd | Glass composition |
| US6727198B1 (en) | 1998-06-24 | 2004-04-27 | Nippon Electric Glass Co., Ltd. | Infrared absorbing glass for reed switch |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60215546A (en) * | 1984-04-06 | 1985-10-28 | Nippon Sheet Glass Co Ltd | Infrared absorption glass |
| JPS6418938A (en) * | 1987-06-29 | 1989-01-23 | Ppg Industries Inc | Manufacture of soda-lime-silica sheet glass |
-
1991
- 1991-04-08 JP JP3103185A patent/JPH08714B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60215546A (en) * | 1984-04-06 | 1985-10-28 | Nippon Sheet Glass Co Ltd | Infrared absorption glass |
| JPS6418938A (en) * | 1987-06-29 | 1989-01-23 | Ppg Industries Inc | Manufacture of soda-lime-silica sheet glass |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001016042A1 (en) * | 1998-06-24 | 2001-03-08 | Nippon Electric Glass Co., Ltd. | Infrared absorbing glass for reed switch |
| US6727198B1 (en) | 1998-06-24 | 2004-04-27 | Nippon Electric Glass Co., Ltd. | Infrared absorbing glass for reed switch |
| US6935138B2 (en) | 1999-08-30 | 2005-08-30 | Nippon Electric Glass Co., Ltd. | Infra-red absorption glass for a reed switch |
| JP2004067460A (en) * | 2002-08-07 | 2004-03-04 | Central Glass Co Ltd | Glass composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08714B2 (en) | 1996-01-10 |
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