JPH0444633B2 - - Google Patents
Info
- Publication number
- JPH0444633B2 JPH0444633B2 JP59059918A JP5991884A JPH0444633B2 JP H0444633 B2 JPH0444633 B2 JP H0444633B2 JP 59059918 A JP59059918 A JP 59059918A JP 5991884 A JP5991884 A JP 5991884A JP H0444633 B2 JPH0444633 B2 JP H0444633B2
- Authority
- JP
- Japan
- Prior art keywords
- foam
- silicon dioxide
- cynoite
- gas
- equimolar amount
- 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.)
- Expired - Lifetime
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- 239000006260 foam Substances 0.000 claims description 15
- 235000012239 silicon dioxide Nutrition 0.000 claims description 9
- 239000000377 silicon dioxide Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000011812 mixed powder Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 6
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 6
- 239000000126 substance Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 229910002012 Aerosil® Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- MOUPNEIJQCETIW-UHFFFAOYSA-N lead chromate Chemical compound [Pb+2].[O-][Cr]([O-])(=O)=O MOUPNEIJQCETIW-UHFFFAOYSA-N 0.000 description 1
- 229910000464 lead oxide Inorganic materials 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Ceramic Products (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
【発明の詳細な説明】
本発明は、サイノイト発泡体の製造方法に関す
る。更に詳しくは、発泡体やガス発生物質を添加
することなく、原料成分自らが反応し、ガスを発
生して発泡体を形成させるサイノイト発泡体の製
造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing Cynoite foam. More specifically, the present invention relates to a method for producing Cynoite foam in which the raw material components themselves react to generate gas to form a foam without adding a foam or a gas-generating substance.
セラミツクス系の発泡体としては、現在アルミ
ナー二酸化けい素系の発泡体が知られているが、
この発泡体を製造する上で次のような条件を必要
としている。 Alumina silicon dioxide foams are currently known as ceramic foams.
The following conditions are required to manufacture this foam.
(1) 高温でガラス相を形成し、発生したガスを内
部に取り込んでおくことができる粘性を有して
いること
(2) ガラス相形成時にガス発生物質が存在するこ
と
こうした条件を満足させるために、次のような
組成
SiO2 60〜70％
Al2O3 15〜25％
CaO＋MgO ０〜５％
Na2Ｏ＋K2Ｏ ３〜４％
のものに、ガス発生物質としてFe2O3を７〜10％
添加し、これらの各成分を混合、成形および加熱
して発泡体を製造していた。(1) It must have a viscosity that allows it to form a glass phase at high temperatures and capture the generated gas inside. (2) A gas-generating substance must be present when the glass phase is formed.In order to satisfy these conditions, To the following composition SiO 2 60-70% Al 2 O 3 15-25% CaO + MgO 0-5% Na 2 O + K 2 O 3-4%, 7-7% Fe 2 O 3 is added as a gas generating substance. Ten%
These components were mixed, molded, and heated to produce a foam.
本発明においては、アルミナの代りに四窒化三
けい素を用い、それを等モル量以上の二酸化けい
素と加熱することにより、ガス発生物質を用いる
ことなく、いん石鉱物の一種であるサイノイトの
発泡体を製造することができることを見出した。 In the present invention, by using trisilicon tetranitride instead of alumina and heating it with silicon dioxide in an equimolar amount or more, cynoite, a type of meteorite mineral, can be foamed without using a gas-generating substance. discovered that it is possible to manufacture the body.
従つて、本発明はサイノイト発泡体の製造方法
に係り、サイノイト発泡体は、四窒化三けい素と
これと等モル量以上の二酸化けい素との混合粉末
を約1700℃以上の温度に加熱することにより製造
される。 Therefore, the present invention relates to a method for producing Cynoite foam, which is produced by heating a mixed powder of trisilicon tetranitride and silicon dioxide in an equimolar amount or more to a temperature of about 1700°C or higher. Manufactured by
四窒化三けい素は、灰色がかつた白色の無定形
粉末で、化学的には不活性であり、例えば硝酸と
フツ化水素酸との混合物に対してもかなり安定で
ある程であり、また融解アルカリ、酸化鉛（価
または価）、クロム酸鉛などと作用させると窒
素ガスを発生することが知られているが、等モル
以上の二酸化けい素と高温条件下で反応させると
サイノイトを形成し、その際発生する一酸化けい
素ガスによつて発泡体を形成させるのである。 Trisilicon tetranitride is an off-white, amorphous powder that is chemically inert and fairly stable, for example in mixtures of nitric acid and hydrofluoric acid. It is known that nitrogen gas is generated when reacted with molten alkali, lead oxide (valence or valence), lead chromate, etc., but when reacted with an equimolar amount or more of silicon dioxide under high temperature conditions, it forms cynoites. The silicon monoxide gas generated during this process forms a foam.
Si3N4＋SiO2→
Si2N2Ｏ＋SiO↑
この反応は、四窒化けい素に対して等モル量以
上、一般にはモル比１〜５モルの二酸化けい素を
用い、約1700℃以上の温度、一般には約1700〜
1900℃の温度に加熱することにより行われる。四
窒化三けい素に対して等モル量以下の二酸化けい
素が用いられると，SiOガスの発生量が微量なた
め発泡が起らず、そのモル比が５以上でも殆ど発
泡しなくなる。そして、この反応による発泡体の
形成は、一般に容器中で行われる。 Si 3 N 4 +SiO 2 → Si 2 N 2 O + SiO↑ This reaction uses silicon dioxide in an equimolar amount or more relative to silicon tetranitride, generally at a molar ratio of 1 to 5 mol, and at a temperature of about 1700°C or higher. , generally around 1700~
It is carried out by heating to a temperature of 1900 ° C. When silicon dioxide is used in an equimolar amount or less to trisilicon tetranitride, foaming does not occur because the amount of SiO gas generated is small, and even if the molar ratio is 5 or more, foaming hardly occurs. The formation of the foam by this reaction is generally carried out in a container.
このようにして得られるサイノイト発泡体は，
高温で用いられるフイルター、断熱材、更には吸
油性を利用した油水分離、保水性、保肥性、通気
性などを利用した植物の生育基盤改良材などとし
て有効に利用することが出来る。また、これらの
用途に一旦利用されても、これの材質がセラミツ
クであるため、これを、約800〜1000℃程度で熱
処理することにより再生が可能であり、再び同様
の用途に用いることも出来る。 The Cynoite foam obtained in this way is
It can be effectively used as a filter used at high temperatures, as a heat insulating material, and as a plant growth base improvement material that uses its oil absorption properties to separate oil and water, and its water retention, fertilizer retention, and air permeability properties. Furthermore, even if it is once used for these purposes, since it is made of ceramic, it can be recycled by heat-treating it at approximately 800 to 1000 degrees Celsius, and it can be used again for similar purposes. .
次に、実施例について本発明を説明する。 Next, the present invention will be explained with reference to examples.
実施例
四窒化三けい素（電気化学製品SN−9S）およ
び二酸化けい素（日本アエロジル製品アエロジル
200）をモル比１：３の割合で配合し、ボールミ
ルを用いて24時間湿式で粉砕、混合した。混合さ
れた原料粉末を乾燥後、アルミナ製るつぼ（日本
化学陶業製SSA−Ｓ）に入れ、蓋をして電気炉
（東京真空製）の中にセツトする。電気炉の炉中
をロータリーポンプで10-3Torr迄減圧にし、そ
の後窒素ガスで置換する。ガス雰囲気中で、1750
℃で５時間加熱した後、冷却する。るつぼの中で
得られたサイノイト発泡体は、密度が0.8ｇ／cm3、
気孔率が80％の性状値を有していた。Examples Trisilicon tetranitride (Electrochemical Products SN-9S) and silicon dioxide (Nippon Aerosil Products Aerosil)
200) at a molar ratio of 1:3, and wet milled and mixed using a ball mill for 24 hours. After drying the mixed raw material powder, it is placed in an alumina crucible (SSA-S, manufactured by Nihon Kagaku Togyo), covered with a lid, and set in an electric furnace (manufactured by Tokyo Shinku). The pressure inside the electric furnace is reduced to 10 -3 Torr using a rotary pump, and then replaced with nitrogen gas. In a gas atmosphere, 1750
After heating at ℃ for 5 hours, cool. The Cynoite foam obtained in the crucible has a density of 0.8 g/cm 3 ,
It had a property value of 80% porosity.
Claims (1)
化けい素との混合粉末を約1700℃以上の温度に加
熱することを特徴とするサイノイト発泡体の製造
方法。 ２ 四窒化三けい素に対しモル比で１乃至５の二
酸化けい素が用いられる特許請求の範囲第１項記
載のサイノイト発泡体の製造方法。[Claims] 1. A method for producing a Cynoite foam, which comprises heating a mixed powder of trisilicon tetranitride and silicon dioxide in an equimolar amount or more to a temperature of about 1700°C or higher. 2. The method for producing a Cynoite foam according to claim 1, wherein silicon dioxide is used in a molar ratio of 1 to 5 to trisilicon tetranitride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59059918A JPS60204680A (en) | 1984-03-28 | 1984-03-28 | Manufacture of thynoit foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59059918A JPS60204680A (en) | 1984-03-28 | 1984-03-28 | Manufacture of thynoit foam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60204680A JPS60204680A (en) | 1985-10-16 |
| JPH0444633B2 true JPH0444633B2 (en) | 1992-07-22 |
Family
ID=13126990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59059918A Granted JPS60204680A (en) | 1984-03-28 | 1984-03-28 | Manufacture of thynoit foam |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60204680A (en) |
-
1984
- 1984-03-28 JP JP59059918A patent/JPS60204680A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60204680A (en) | 1985-10-16 |
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