JPH0566907B2 - - Google Patents
Info
- Publication number
- JPH0566907B2 JPH0566907B2 JP27010685A JP27010685A JPH0566907B2 JP H0566907 B2 JPH0566907 B2 JP H0566907B2 JP 27010685 A JP27010685 A JP 27010685A JP 27010685 A JP27010685 A JP 27010685A JP H0566907 B2 JPH0566907 B2 JP H0566907B2
- Authority
- JP
- Japan
- Prior art keywords
- alumina cement
- weight
- wollastonite
- parts
- water
- 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 - Fee Related
Links
- 229910052882 wollastonite Inorganic materials 0.000 claims description 18
- 239000010456 wollastonite Substances 0.000 claims description 18
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 17
- 239000004568 cement Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 10
- 238000000465 moulding Methods 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- 238000000967 suction filtration Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 7
- 239000002002 slurry Substances 0.000 description 6
- 238000010304 firing Methods 0.000 description 5
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Landscapes
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はCaO、SaO2、Al2O3系の連通気孔を有
するセラミツクス焼結体の製造法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a ceramic sintered body having interconnected pores made of CaO, SaO 2 or Al 2 O 3 .
水処理において微細な粒状の空気の水中への吹
き込み材やアルミニウム溶湯中へ微細な粒状のガ
スの吹き込み材、或いは触媒の担体、液体や気体
のフイルターとして用いられている一般的には連
通気孔を有するセラミツクスは、次のような製造
法で製造されいる。
In water treatment, it is generally used as a material for blowing fine particulate air into water, a material for blowing fine particulate gas into molten aluminum, a carrier for catalysts, and a filter for liquids and gases. Ceramics having the above are manufactured by the following manufacturing method.
(1) 連通気孔を有するウレタンフオームに微細な
耐火物よりなるスラリーをコーテイングして焼
成し、発泡ウレタンを焼却して発泡ウレタンと
同構造物のものを作る。(1) A urethane foam with open holes is coated with a slurry made of fine refractories and fired, and the foamed urethane is incinerated to produce a product with the same structure as the foamed urethane.
(2) 細い単繊維からなる布を微細な耐火物のスラ
リーに浸し、巻きとり焼成する。(2) A cloth made of thin single fibers is soaked in a fine refractory slurry, rolled up and fired.
(3) 耐火原料の粒度を揃え、これに結合粘土を加
え加圧成形し、乾燥、焼成する。(3) Adjust the particle size of the refractory raw materials, add binder clay, press-form, dry, and fire.
しかし、(1)、(2)の方法は通気孔形成材としてウ
レタンフオームや、布を使用するのでこれを焼却
するのに時間がかかり、高価となり、(3)の方法は
目的とする孔径範囲以外の孔も多くできてしまう
欠点がある。 However, methods (1) and (2) use urethane foam or cloth as the ventilation hole forming material, which takes time to incinerate and is expensive; The disadvantage is that many other holes are also formed.
本発明は、有機物を使用せず安価に均質な組織
を有する連通気孔を有するセラミツクスの製造法
を供することを目的とするものである。
An object of the present invention is to provide a method for producing ceramics having continuous pores and having a homogeneous structure at low cost without using organic substances.
本発明は上記の目的を達するため粉状の針状ワ
ラストナイトとハイアルミナセメント水とを、針
状ワラストナイトとハイアルミナセメントとの重
量比が50：50〜３：65の割合になるように混合し
た混合物を、成形して硬化させた後、乾燥し焼成
して連通気孔を有するセラミツクスを得ることに
ある。
In order to achieve the above object, the present invention uses powdered acicular wollastonite and high alumina cement water such that the weight ratio of the acicular wollastonite and high alumina cement is 50:50 to 3:65. The object of the present invention is to mold and harden the mixture as described above, then dry and sinter it to obtain ceramics having continuous pores.
針状ワラストナイトは、CaO・SiO2の化学組
成を有し、マツチの軸木状の結晶をなしている。
天然には岩石状で産するので、これを粉砕する
と、直径0.3mm以下の針状結晶に分離する。本発
明では得ようとする連通気孔の大きさにより、こ
れをそのまゝか、更に細い針状結晶に粉砕した粉
状物を使用する。 Acicular wollastonite has a chemical composition of CaO and SiO 2 and forms crystals in the shape of a pine shaft.
It occurs naturally in the form of rock, and when crushed, it separates into needle-shaped crystals with a diameter of 0.3 mm or less. In the present invention, depending on the size of the communicating pores to be obtained, this powder may be used as is or a powder obtained by pulverizing it into finer needle-like crystals.
アルミナセメントとしては、Al2O3とCaOの重
量比が1.83以上、即ちAl2O3分子数のCaO分子数
に対する比が１以上のものを使用する。これより
Al2O3分が少ないと連通気孔を有するように焼結
するのが困難となるからである。 The alumina cement used has a weight ratio of Al 2 O 3 to CaO of 1.83 or more, that is, a ratio of the number of Al 2 O 3 molecules to the number of CaO molecules of 1 or more. Than this
This is because if the amount of Al 2 O 3 is small, it becomes difficult to sinter so as to have continuous pores.
添加する水を量は混合物を吸引濾過成形法で成
形するときは、スラリー状とする必要があるの
で、ワラストナイトとハイアルミナセメントとの
合計100重量部に対し60〜90重量部、流し込み成
形では、40〜50重量部程度である。水は混合物中
に気泡が生じないように充分加える必要がある
が、あまり多量に用いると、焼成後の強度を小さ
くし硬化乾燥に時間がかかるようになるので不経
済となる。 The amount of water to be added is 60 to 90 parts by weight for a total of 100 parts by weight of wollastonite and high alumina cement, since it is necessary to form a slurry when molding the mixture by suction filtration molding. In this case, the amount is about 40 to 50 parts by weight. It is necessary to add enough water to prevent bubbles from forming in the mixture, but if too much water is used, the strength after firing will be reduced and it will take time to harden and dry, which is uneconomical.
成形に吸引濾過成形を用いると、水が吸引され
た跡が硬化体に連通気孔として残るだけでなく、
硬化に必要な水分以外の水分を極力少なくできる
ので、硬化後の乾燥を経済的に行なうことができ
る。 If suction filtration molding is used for molding, not only will traces of water being sucked remain in the cured product as continuous holes;
Since moisture other than that required for curing can be minimized, drying after curing can be carried out economically.
ハイアルミナセメントは、ワラストナイトを骨
材として硬化し、成形体を取扱い容易にする。
又、硬化した成形体中に不規則な立体格子状に存
在するワラストナイトの周囲に存在するアルミナ
セメントは、アルミナセメントとワラストナイト
との界面で焼成温度が約1265℃以上となると溶融
して、ワラシトナイト中に取り込まれ、格子内に
連通気孔が形成される。ワラストナイトとアルミ
ナセメントより生成した融液はアルミナセメント
分が増加するに従い融点が上昇するが、あまり焼
成温度を高くすると格子を形成している芯のワラ
ストナイトが溶融して連通気孔がつぶれるように
なるので焼成は約1265℃以上、約1380℃以下で行
なうのが良い。
High alumina cement hardens using wollastonite as an aggregate, making it easier to handle molded products.
In addition, the alumina cement that exists around the wollastonite that exists in an irregular three-dimensional lattice shape in the hardened compact melts at the interface between the alumina cement and wollastonite when the firing temperature reaches approximately 1265°C or higher. As a result, it is incorporated into the wallasitonite, forming continuous pores within the lattice. The melting point of the melt produced from wollastonite and alumina cement increases as the alumina cement content increases, but if the firing temperature is too high, the core wollastonite that forms the lattice will melt and the continuous pores will collapse. Therefore, it is best to perform firing at a temperature of about 1265°C or higher and about 1380°C or lower.
針状ワラストナイトとアルミナセメントの配合
割合において、重量割合で針状ワラストナイト50
に対しアルミナセメントが50未満であると、融点
が上昇せず上記焼成温度が溶けてしまい多孔体が
得られず、又針状ワラストナイト35に対しアルミ
ナセメントが65を越えると、通気率の殆んどない
ものとなる。 In the blending ratio of acicular wollastonite and alumina cement, acicular wollastonite is 50% by weight.
On the other hand, if the alumina cement is less than 50, the melting point will not rise and the above firing temperature will melt and a porous body will not be obtained.Also, if the alumina cement exceeds 65 compared to the acicular wollastonite 35, the air permeability will decrease. It becomes almost non-existent.
(1) 太さが60メツシユ全通の針状ワラストナイト
50重量部、ハイアルミナセメント（Al2O3／
CaO＝2.18重量比）50重量部に水75重量部を加
え、スラリー状にする。これを吸引濾過成形
後、一昼夜放置して硬化させた。これを脱型し
て105℃で24時間乾燥後、1300℃で３時間大気
中で焼成することにより嵩密度1.12ｇ／cm3、通
気率1.84cm3cm／cm2seocmH2Oのものを得た。
(1) Needle-like wollastonite with a thickness of 60 mesh
50 parts by weight, high alumina cement (Al 2 O 3 /
Add 75 parts by weight of water to 50 parts by weight (CaO = 2.18 weight ratio) to form a slurry. After suction filtration and molding, this was left overnight to harden. This was demolded, dried at 105°C for 24 hours, and then fired in the air at 1300°C for 3 hours to obtain a product with a bulk density of 1.12 g/cm 3 and an air permeability of 1.84 cm 3 cm/cm 2 seocmH 2 O. Ta.
(2) 太さが60メツシユ全通の針状ワラストナイト
40重量部、ハイアルミナセメント（Al2O3／
CaO＝2.18重量比）60重量部に水75重量部を加
えスラリー状にする。これを吸引濾過成形後、
一昼夜放置して硬化させた。これを脱型105℃
で24時間乾燥後、1300℃３時間大気中で焼成す
ることにより嵩密度1.19ｇ／cm3、通気率0.90cm3
cm／cm2seocmH2Oのものを得た。(2) Needle-shaped wollastonite with a thickness of 60 mesh
40 parts by weight, high alumina cement (Al 2 O 3 /
Add 75 parts by weight of water to 60 parts by weight (CaO = 2.18 weight ratio) to form a slurry. After suction filtration and molding,
It was left to harden overnight. Remove this from the mold at 105℃
After drying for 24 hours at 1300°C, baking in the air for 3 hours gives a bulk density of 1.19 g/cm 3 and air permeability of 0.90 cm 3
cm/cm 2 seocmH 2 O was obtained.
(3) 太さが200メツシユ全通の針状ワラストナイ
ト50重量部、ハイアルミナセメント（Al2O3／
CaO＝2.18重量比）50重量部に水75重量部を加
え、スラリー状にする。これを吸引濾過成形
後、一昼夜放置して硬化させた。これを脱型し
て105℃で24時間乾燥後1300℃で３時間大気中
で焼成することにより嵩密度1.24ｇ／cm3、通気
率0.30cm3cm／cm2seocmH2Oのものを得た。(3) 50 parts by weight of acicular wollastonite with a thickness of 200 mesh, high alumina cement (Al 2 O 3 /
Add 75 parts by weight of water to 50 parts by weight (CaO = 2.18 weight ratio) to form a slurry. After suction filtration and molding, this was left overnight to harden. This was demolded, dried at 105°C for 24 hours, and then fired in the air at 1300°C for 3 hours to obtain a product with a bulk density of 1.24 g/cm 3 and an air permeability of 0.30 cm 3 cm/cm 2 seocmH 2 O. .
本発明によれば、針状ワラストナイトの太さを
選定することにより、均質で10〜100μｍの連通
気孔径を有するセラミツクスを安価で容易に製造
できる。
According to the present invention, by selecting the thickness of the acicular wollastonite, it is possible to easily produce homogeneous ceramics having continuous pore diameters of 10 to 100 μm at low cost.
Claims (1)
メントと水を、針状ワラストナイトとハイアルミ
ナセメントとの重量比が50：50〜35：65の割合に
なるように混合した混合物を、成形して硬化させ
た後、乾燥し焼成する連通気孔を有するセラミツ
クスの製造法。 ２ 混合物の成形を吸引濾過成形により行なう特
許請求の範囲１項に記載の連通気孔を有するセラ
ミツクスの製造法。[Claims] 1. Powdered acicular wollastonite, high alumina cement, and water are mixed so that the weight ratio of acicular wollastonite and high alumina cement is 50:50 to 35:65. A method for manufacturing ceramics having continuous pores, in which a mixed mixture is molded and hardened, then dried and fired. 2. The method for producing ceramics having communicating pores according to claim 1, wherein the mixture is formed by suction filtration molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27010685A JPS62128979A (en) | 1985-11-29 | 1985-11-29 | Manufacture of ceramics with continuous pores |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27010685A JPS62128979A (en) | 1985-11-29 | 1985-11-29 | Manufacture of ceramics with continuous pores |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62128979A JPS62128979A (en) | 1987-06-11 |
| JPH0566907B2 true JPH0566907B2 (en) | 1993-09-22 |
Family
ID=17481618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27010685A Granted JPS62128979A (en) | 1985-11-29 | 1985-11-29 | Manufacture of ceramics with continuous pores |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62128979A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0226873A (en) * | 1988-07-13 | 1990-01-29 | Tsumoru Hatayama | Calcining method for ceramic |
| JP6347513B2 (en) * | 2014-08-21 | 2018-06-27 | 地方独立行政法人山口県産業技術センター | Method for producing natural wollastonite ceramic porous body |
-
1985
- 1985-11-29 JP JP27010685A patent/JPS62128979A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62128979A (en) | 1987-06-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |