JPH01317173A - Refractory material for calcining ceramic - Google Patents
Refractory material for calcining ceramicInfo
- Publication number
- JPH01317173A JPH01317173A JP63147397A JP14739788A JPH01317173A JP H01317173 A JPH01317173 A JP H01317173A JP 63147397 A JP63147397 A JP 63147397A JP 14739788 A JP14739788 A JP 14739788A JP H01317173 A JPH01317173 A JP H01317173A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- sintered
- alumina
- weight
- partially stabilized
- 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
- 239000000919 ceramic Substances 0.000 title claims abstract description 11
- 239000011819 refractory material Substances 0.000 title claims description 9
- 238000001354 calcination Methods 0.000 title 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000000843 powder Substances 0.000 claims abstract description 26
- 239000000835 fiber Substances 0.000 claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910002077 partially stabilized zirconia Inorganic materials 0.000 claims abstract description 10
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 9
- 238000010304 firing Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 abstract description 16
- 239000000758 substrate Substances 0.000 abstract description 9
- 239000007787 solid Substances 0.000 abstract description 5
- 230000009257 reactivity Effects 0.000 abstract description 2
- 239000011369 resultant mixture Substances 0.000 abstract 1
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 16
- 229910002113 barium titanate Inorganic materials 0.000 description 10
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 10
- 230000007423 decrease Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 229910052863 mullite Inorganic materials 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 3
- 238000000859 sublimation Methods 0.000 description 3
- 230000008022 sublimation Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 239000011362 coarse particle Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004901 spalling Methods 0.000 description 2
- 229910002076 stabilized zirconia Inorganic materials 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、チタン酸バリウムのような反応性に富むセラ
ミックを焼成する際、焼成炉内で原料成形体を乗せるに
用いる耐火材に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a refractory material used for placing a raw material molded body in a firing furnace when firing highly reactive ceramics such as barium titanate.
一般に陶磁器を窯で焼成するには、アルミナ質、ムライ
ト質、炭化ケイ素質、ジルコニア質の耐火物の板や容器
に原料成形体を乗せ、あるいは入れて、原料成形体が溶
着したり、灰が付着したりしないようにして焼成してい
る。チタン酸バリウムのような反応性に富むセラミック
スの焼成Ｇこは、ジルコニア質以外の板や容器を用いる
と反応するので、ジルコニア質の粒子を焼結した板や容
器が用いられている。Generally, to fire ceramics in a kiln, the raw material molded body is placed on or placed in a refractory plate or container made of alumina, mullite, silicon carbide, or zirconia, and the raw material molded body is welded or ash is formed. It is fired in a way that prevents it from sticking. When firing highly reactive ceramics such as barium titanate, the reaction will occur if plates or containers other than zirconia are used, so plates and containers made of sintered zirconia particles are used.
しかし、この耐火物は嵩密度３．０ ｇ／ｃｃ以上で重
いため熱容量が大すく、炉の昇温、降温に時間がかかる
だけでなく、取扱いにくい問題がある。However, this refractory is heavy with a bulk density of 3.0 g/cc or more and has a large heat capacity, which not only takes time to raise and lower the temperature of the furnace, but also makes it difficult to handle.
この問題を解決するために、アルミナ、シリカ−アルミ
ナ、シリカ繊維などの耐火繊維とシリカ、ムライト等の
耐火物粉末とからなる焼結成形体の表面にジルコニアを
コーティングして焼結し、表面にジルコニアの薄膜を形
成した嵩密度０．８〜１．２ｇ７′ｃｃの軽量耐火物を
用いることが考えられる。To solve this problem, the surface of a sintered compact made of refractory fibers such as alumina, silica-alumina, and silica fibers and refractory powders such as silica and mullite was coated with zirconia and sintered. It is conceivable to use a lightweight refractory material having a bulk density of 0.8 to 1.2 g7'cc formed with a thin film.
しかし、この耐火物もチタン酸バリウムを乗せて焼成す
ると、反応が残り、チタン酸バリウムとの反応を完全に
無くすることは出来なかった。チタン酸バリウム等の製
品が台や容器と接触する部分で焼成の際に反応し、不純
物が混入したり、成分が変化することは品質や性能に悪
影響を与えるので極力避けなければならない。However, when this refractory was fired with barium titanate on it, some reaction remained and it was not possible to completely eliminate the reaction with barium titanate. Products such as barium titanate react during firing in areas where they come into contact with the stand or container, resulting in the introduction of impurities or changes in composition, which have a negative impact on quality and performance and must be avoided as much as possible.
本発明は、このような反応性を有するセラミックを焼成
するときに、被焼成物と接触する部分で反応が起こらな
いセラミック焼成用耐火材を提供しようとするものであ
る。The present invention aims to provide a refractory material for firing ceramics that does not cause a reaction in the portion that comes into contact with the object to be fired when firing a ceramic having such reactivity.
本発明による課題を解決するための手段は、アルミナ繊
維と、易焼結性アルミナ微粉末と、シリカ微粉末と、こ
れらのアルミナ繊維と易焼結性アルミナ微粉末との合計
１００重量部に対して０．３〜１．５重量部のＭｇＯと
からなる焼結基体と、該焼結基体の表面に一体に焼結さ
れた、数〜２０μｍの粒径の部分安定化ジルコニアから
なる７０〜１５０μｍの厚さの第１層と、該第１層の上
に一体に焼結された数十〜２００μｍの粒径の部分安定
化ジルコニアからなる１００〜２５０μｍの厚さの第２
層とを有するセラミック焼成用耐火材である。The means for solving the problems according to the present invention is to use alumina fibers, easily sinterable alumina fine powder, silica fine powder, and a total of 100 parts by weight of these alumina fibers and easily sinterable alumina fine powder. A sintered base consisting of 0.3 to 1.5 parts by weight of MgO and 70 to 150 μm consisting of partially stabilized zirconia with a particle size of several to 20 μm integrally sintered on the surface of the sintered base. a first layer with a thickness of 100 to 250 μm, and a second layer with a thickness of 100 to 250 μm made of partially stabilized zirconia with a grain size of several tens to 200 μm integrally sintered on the first layer.
It is a refractory material for ceramic firing having a layer.
この発明で、アルミナ繊維はこの耐火材を軽量化するた
めに用いるもので、被焼成物を焼成するための１４００
〜１６００Ｃ＆こ耐えるものである。この繊維を抄紙法
で成形したものは、この繊維だけでは被焼成物を支持す
るための圧縮強度が不足するので、易焼結性アルミナ微
粉末を加えて嵩密度を０．８〜１．２ｇ／ｃｃ程度とし
、被焼成物を支持しつる強度を有せしめる。このためＧ
こ両者の合計を１００重量部とすると、アルミナ繊維１
５〜７５重量部に対して易焼結性アルミナ微粉末２５〜
８５重量部の割合とするのが良い。In this invention, alumina fiber is used to reduce the weight of this refractory material, and is used to reduce the weight of this refractory material.
It can withstand up to 1600C. When molding this fiber using the papermaking method, this fiber alone lacks the compressive strength to support the object to be fired, so easily sinterable alumina fine powder is added to increase the bulk density to 0.8 to 1.2 g. /cc to provide support and hanging strength for the object to be fired. For this reason, G
If the total of both is 100 parts by weight, then 1 part of alumina fiber
25 to 75 parts by weight of easily sinterable alumina fine powder
The proportion is preferably 85 parts by weight.
シリカ微粉末は、アルミナ繊維と易焼結性アルミナ微粉
末との結合剤として用いるもので、一般（こ無機結合剤
として用いられているシリカゾルが用いられる。このシ
リカ微粉末の使用量は、アルミナ繊維と易焼結性アルミ
ナ微粉末との合計１００重量部Ｇこ対して２〜２０重量
部が良い。Silica fine powder is used as a binder between alumina fibers and easily sinterable alumina fine powder, and silica sol, which is commonly used as an inorganic binder, is used. The total amount of the fibers and easily sinterable alumina fine powder is 100 parts by weight, but preferably 2 to 20 parts by weight.
アルミナ繊維自体は焼結性がなく、易焼結性アルミナ微
粉末は、圧縮されていない状態のため、焼結性が少ない
ので、シリカ微粉末の使用量は、２重量部未満では焼成
温度を高くしても結合性が不足して使用に対する強度不
十分となり、２０重量部を超えると耐火温度が低下する
だけでなく、アルミナ繊維と反応してムライトを生成し
アルミナ繊維の結晶を粗大化し使用中に脆化するので好
ましくない。Alumina fiber itself does not have sinterability, and easily sinterable alumina fine powder has little sinterability because it is not compressed. Therefore, if the amount of silica fine powder used is less than 2 parts by weight, the firing temperature will be lowered. Even if it is increased, the bonding properties will be insufficient and the strength will be insufficient for use, and if it exceeds 20 parts by weight, not only will the fire resistance temperature decrease, but it will also react with the alumina fibers to form mullite, making the crystals of the alumina fibers coarser before use. It is not preferable because it becomes brittle inside.
ＭｇＯとしては、固形分中への分散を良くする為に微粉
として入手しやすい試薬級のものを用いるのが良い。As MgO, it is preferable to use reagent-grade MgO that is easily available as a fine powder in order to improve dispersion in the solid content.
部分安定化ジルコニアは、Ｙ ＯＮ Ｃａｂｓ ＭｇＯ
−。Partially stabilized zirconia is Y ON Cabs MgO
−.
Ｃｅ０２などの安定化剤Ｑこより部分安定化された市販
のものを用いる。部分安定化ジルコニアは、焼成後の耐
スポーリング性において安定化ジルコニアより優れる。A commercially available stabilizer Q such as Ce02 which is partially stabilized is used. Partially stabilized zirconia is superior to stabilized zirconia in terms of spalling resistance after firing.
成形は、アルミナ繊維、易焼結性アルミナ微粉末、シリ
カゾル、ＭｇＯ微粉末と、少量の有機結合剤とを水中に
固形分が０．５重量％程度の濃度となるように混合して
湿式抄紙法で成形する。これを１１０Ｃ程度で乾燥して
約１５００ Ｕで焼結し、焼結体を砥石で所望形状に切
削加工し、ペースト状にしたＺｒＯ粉を微粒を数回、粗
粒を数回塗布して１１０Ｃ程度で乾燥した後、約１４０
０ ｔｒで焼成して製品とするものである。Forming is carried out by wet paper making by mixing alumina fibers, easily sinterable alumina fine powder, silica sol, MgO fine powder, and a small amount of organic binder in water to a solid content of about 0.5% by weight. Shape by method. This was dried at about 110C, sintered at about 1500U, the sintered body was cut into the desired shape with a grindstone, and paste-like ZrO powder was applied several times with fine grains and several times with coarse grains. After drying at about 140
The product is produced by firing at 0 tr.
本発明で焼結基体にＭｇＯを添加すると、チタン酸バリ
ウムと表面のジルフニア薄層とが反応するのを無くする
ことが出来る。その添加量がアルミナ繊維と易焼結性ア
ルミナ微粉末との合計１００重量部に対して０．３重量
部未満では、チタン酸バリウムとの反応があり、１．５
重量部を超えるとアルミナ繊維の結晶が粗大化し、焼結
基体の強度、焼結基体の融点が低下し収縮が大となり、
スポーリング抵抗性が低下し、焼結基体が使用に対して
耐久性を有しないようになるので、添加量の範囲を０．
３〜１゜５重量部とする。In the present invention, when MgO is added to the sintered substrate, it is possible to prevent the barium titanate from reacting with the zilphnia thin layer on the surface. If the amount added is less than 0.3 parts by weight with respect to the total of 100 parts by weight of alumina fiber and easily sinterable alumina fine powder, it will react with barium titanate and 1.5 parts by weight will occur.
If the amount exceeds 1 part by weight, the crystals of the alumina fibers will become coarse, the strength of the sintered base and the melting point of the sintered base will decrease, and shrinkage will increase.
Since the spalling resistance decreases and the sintered substrate becomes undurable for use, the addition amount range is set to 0.
The amount should be 3 to 1.5 parts by weight.
その反応を抑制する確たる理由は不明であるが、反応抑
制のメカニズムを推定すると下記の如くなる。Although the exact reason for suppressing the reaction is unknown, the mechanism of reaction suppression is estimated as follows.
即ち、高温において酸化物蒸発が起こることはよく知ら
れており、高温になるとベースであるアルミナ−シリカ
質からＡｔ Ｏ、ＳｉＯが部分的に蒸発し、チタン酸バ
リウムの蒸気と反応すると考えられるが、ベースにＭｇ
Ｏを添加することにより、Ａ７！Ｏの蒸発をトラップし
部分的にスピネル（ＭｇＯ・ＡｔＯ）を形成させｉ ０
の蒸発を抑制しているのではないかと推定される。That is, it is well known that oxide evaporation occurs at high temperatures, and it is thought that at high temperatures, AtO and SiO partially evaporate from the base alumina-silica and react with barium titanate vapor. , Mg base
By adding O, A7! Trap the evaporation of O and partially form spinel (MgO・AtO) i 0
It is presumed that the evaporation of water is suppressed.
本発明において、数〜２０μｍの粒径の部分安定化ジル
コニアからなる７０〜１５０μｍの厚さの第１層と、該
第１層の上に施された数十〜２００μｍの粒径の部分安
定化ジルコニアからなる１００〜２５０μｍの厚さの第
２層とを焼結基体の表面に一体に焼結するのは、第１層
は焼結基体の表面への有害物質の昇華を微粒のジルコニ
アの焼結された薄層で抑制するためであり、この層の厚
さは塗布して焼結するため場所により異なるが薄いとこ
ろでも７０μｍは必要であり、１５０μｍを超えると微
細なりラックを生し有害物質の外部への昇華を防ぐこと
が出来なくなる。又、このジルコニアの粒径を数〜２０
μｍとするのは、粒径がこれよりも小さいと高価となる
だけでなく、焼結層に微細なりラックが生じ易くなり、
粒径がこれより太さいと粒子間に生ずる間隙が大きくな
って内部から外部への有害物質の昇華を抑えることが出
来なくなるからである。第２層は粒径が第１層より大さ
い粒子の焼結層からなるので、焼結された表面の凹凸が
大きくなり被焼結体と凸部で接触するようになるので、
被焼結体表面の大部分と第２層の表面との間に微細な空
隙を形成し、被焼結体表面への有害昇華物質を到達しに
くくすることで被焼結体と有害昇華物質との反応を抑制
できる。In the present invention, a first layer with a thickness of 70 to 150 μm made of partially stabilized zirconia with a particle size of several to 20 μm, and a partially stabilized layer with a particle size of several tens to 200 μm applied on the first layer. The reason why the second layer of zirconia with a thickness of 100 to 250 μm is integrally sintered on the surface of the sintered substrate is that the first layer is made of sintered fine particles of zirconia to prevent the sublimation of harmful substances to the surface of the sintered substrate. The thickness of this layer varies depending on the location because it is coated and sintered, but 70 μm is necessary even in a thin place, and if it exceeds 150 μm, fine racks will be formed and harmful substances sublimation to the outside cannot be prevented. In addition, the particle size of this zirconia is several to 20
The reason why it is set to μm is that if the particle size is smaller than this, not only will it be expensive, but the sintered layer will become finer and more likely to cause racks.
This is because if the particle size is larger than this, the gaps formed between the particles become large, making it impossible to suppress the sublimation of harmful substances from the inside to the outside. Since the second layer is composed of a sintered layer of particles whose particle size is larger than that of the first layer, the unevenness of the sintered surface becomes large and comes into contact with the sintered body at the convex parts.
Fine voids are formed between most of the surface of the object to be sintered and the surface of the second layer, making it difficult for harmful sublimated substances to reach the surface of the object to be sintered. The reaction with can be suppressed.
第１層はこの粗粒からなる第２層の焼結基体への密着性
を高める。粗粒だけでは密着性に乏しく容易に剥落する
。第２層を１００〜２５０μｍとするのは、塗布して焼
結するため厚さは場所により異なるが、１００μｍより
薄い部分では第１層への密着性が不十分となるだけでな
く凹凸の形成が不十分となり、２５０μｍより大きくな
っても、第２層の焼結性が低下するだけでなく反応抑制
の効果はもはや変わらなくなる。第２層の粒径は数十μ
ｍより小さいと凹凸の形成が不十分となり、２００μｍ
よりも大さくなると塗布の際第１層を傷つけたり、第１
層への付着性が悪くなるのでこの程度とする。The first layer improves the adhesion of the second layer made of coarse particles to the sintered substrate. Coarse particles alone have poor adhesion and easily peel off. The reason why the second layer is 100 to 250 μm is because it is coated and sintered, so the thickness varies depending on the location, but parts thinner than 100 μm not only have insufficient adhesion to the first layer but also form unevenness. If the thickness becomes insufficient and becomes larger than 250 μm, not only will the sinterability of the second layer decrease, but the reaction suppression effect will no longer change. The particle size of the second layer is several tens of microns
If it is smaller than 200 μm, the formation of unevenness will be insufficient.
If the size is larger than that, it may damage the first layer during coating or damage the first layer.
Since adhesion to the layer becomes poor, this level is set.
アルミナファイバー４００ ｇと、平均粒径０．４μｍ
の易焼結性アルミナ微粉末６００ｇと、シリカゾルを固
形分として８ｇと、試薬級のＭｇＯ粉末を第１表に示す
量と、澱粉５０ ｇの割合で、水中に固形分の濃度が０
．５重Ｍ％となるように混合した。これをスクリーン上
に湿式成形して１１０Ｃで３０時間乾燥した後、１５０
０Ｃで３時間焼成した。これを砥石で成形加工し、嵩比
重１．０８ ｇ／ｃｃで、縦１５Ｃ１１ｆｉ、横１００
１１１％、厚さ５龍の焼結基体を得た。400 g of alumina fiber and average particle size of 0.4 μm
With the ratio of 600 g of easily sinterable alumina fine powder, 8 g of silica sol as a solid content, the amount of reagent grade MgO powder shown in Table 1, and 50 g of starch, the concentration of solid content in water was 0.
．． They were mixed to a concentration of 5% by weight. After wet-molding this on a screen and drying it at 110C for 30 hours,
It was baked at 0C for 3 hours. This is shaped using a grindstone, and has a bulk specific gravity of 1.08 g/cc, a length of 15C11fi, and a width of 100mm.
A sintered substrate with a thickness of 111% and a thickness of 5 mm was obtained.
その表面に粒径３〜２０μｍのＹＯで部分安定化したジ
ルコニアの５０重量％水溶液を数回塗布して１１０Ｃで
４時間乾燥し、１４００Ｃで１時間焼成して第１層だけ
の製品を得た。A 50 wt% aqueous solution of zirconia partially stabilized with YO with a particle size of 3 to 20 μm was applied to the surface several times, dried at 110 C for 4 hours, and baked at 1400 C for 1 hour to obtain a product with only the first layer. .
これらの製品を切断し顕微鏡で第１層の厚さを調へ、又
これらを炉内に配置してその上にチタン酸バリウムを乗
せ１４００ Ｃで２時間かけて焼成した。その結果を第
１表に示す。These products were cut and the thickness of the first layer was measured using a microscope, and they were placed in a furnace, barium titanate was placed thereon, and fired at 1400 C for 2 hours. The results are shown in Table 1.
第 １ 表
次に、同じ焼結基体に上記と同様にして第１層が７０〜
１５０μｍの厚さとなるように塗布し、更に粒径数十〜
２００μｍのＯａＯ安定化ジルコニアの粉末を５０重量
％の水溶液として数回塗布し、上記と同様にして乾燥焼
成して第１層の上に第２層を形成した製品を得た。Table 1 Next, on the same sintered substrate, a first layer of 70~
Coat to a thickness of 150 μm, and further increase the particle size to several tens of μm.
A 200 μm OaO-stabilized zirconia powder was applied several times as a 50% by weight aqueous solution, and dried and fired in the same manner as above to obtain a product in which a second layer was formed on the first layer.
これらの製品を切断し顕微鏡で第２層の厚さを調べ、又
これらを炉内に配置してその上にチタン酸バリウムを乗
せ、１４００ｒで２時間かけて焼成した。その結果を第
２表に示す。These products were cut and the thickness of the second layer was examined using a microscope, and they were placed in a furnace, barium titanate was placed thereon, and fired at 1400 rpm for 2 hours. The results are shown in Table 2.
第 ２ 表
〔発明の効果〕
本発明によれば、反応性に富むセラミックを焼成するた
めの、セラミックと反応しない軽くて熱効率が良く耐久
性のある耐火材を提供でさる。Table 2 [Effects of the Invention] According to the present invention, it is possible to provide a lightweight, highly thermally efficient, and durable refractory material that does not react with ceramics and is used for firing highly reactive ceramics.
出願人 イソライト工業株式会社Applicant: Isolite Industries Co., Ltd.
Claims (1)
カ微粉末と、これらのアルミナ繊維と易焼結性アルミナ
微粉末との合計１００重量部に対して０．３〜１．５重
量部のＭｇＯとからなる焼結基体と、該焼結基体の表面
に一体に焼結された数〜２０μｍの粒径の部分安定化ジ
ルコニアからなる７０〜１５０μｍの厚さの第１層と、
該第１層の上に一体に焼結された数十〜２００μｍの粒
径の部分安定化ジルコニアからなる１００〜２５０μｍ
の厚さの第２層とを有するセラミック焼成用耐火材。1. 0.3 to 1.5 parts by weight of alumina fibers, easily sinterable alumina fine powder, silica fine powder, and 100 parts by weight in total of these alumina fibers and easily sinterable alumina fine powder. a sintered base made of MgO; a first layer with a thickness of 70 to 150 μm made of partially stabilized zirconia with a grain size of several to 20 μm integrally sintered on the surface of the sintered base;
100 to 250 μm consisting of partially stabilized zirconia with a grain size of several tens to 200 μm integrally sintered on the first layer.
A refractory material for ceramic firing having a second layer having a thickness of .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63147397A JPH01317173A (en) | 1988-06-15 | 1988-06-15 | Refractory material for calcining ceramic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63147397A JPH01317173A (en) | 1988-06-15 | 1988-06-15 | Refractory material for calcining ceramic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01317173A true JPH01317173A (en) | 1989-12-21 |
| JPH05359B2 JPH05359B2 (en) | 1993-01-05 |
Family
ID=15429354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63147397A Granted JPH01317173A (en) | 1988-06-15 | 1988-06-15 | Refractory material for calcining ceramic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01317173A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04158189A (en) * | 1990-10-19 | 1992-06-01 | Ngk Insulators Ltd | Baking shelf plate |
| JPH05270925A (en) * | 1992-03-23 | 1993-10-19 | Ngk Insulators Ltd | Refractory material for ceramic burning |
| JP2005041777A (en) * | 2004-09-22 | 2005-02-17 | Mitsui Mining & Smelting Co Ltd | Electronic component firing tool |
-
1988
- 1988-06-15 JP JP63147397A patent/JPH01317173A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04158189A (en) * | 1990-10-19 | 1992-06-01 | Ngk Insulators Ltd | Baking shelf plate |
| JPH05270925A (en) * | 1992-03-23 | 1993-10-19 | Ngk Insulators Ltd | Refractory material for ceramic burning |
| JP2005041777A (en) * | 2004-09-22 | 2005-02-17 | Mitsui Mining & Smelting Co Ltd | Electronic component firing tool |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05359B2 (en) | 1993-01-05 |
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