JPS61270256A - Thermal shock resistant ceramic - Google Patents
Thermal shock resistant ceramicInfo
- Publication number
- JPS61270256A JPS61270256A JP60113613A JP11361385A JPS61270256A JP S61270256 A JPS61270256 A JP S61270256A JP 60113613 A JP60113613 A JP 60113613A JP 11361385 A JP11361385 A JP 11361385A JP S61270256 A JPS61270256 A JP S61270256A
- Authority
- JP
- Japan
- Prior art keywords
- thermal shock
- weight
- alumina
- ceramics
- resistant ceramic
- 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 description 27
- 230000035939 shock Effects 0.000 title claims description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 19
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 14
- 239000003513 alkali Substances 0.000 claims description 13
- 238000010304 firing Methods 0.000 claims description 10
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical group [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 claims description 6
- 239000000843 powder Substances 0.000 description 13
- 229910052878 cordierite Inorganic materials 0.000 description 10
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 10
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 7
- 230000000704 physical effect Effects 0.000 description 7
- 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 5
- 229910052863 mullite Inorganic materials 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 235000011187 glycerol Nutrition 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 239000004014 plasticizer Substances 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 229920000609 methyl cellulose Polymers 0.000 description 3
- 239000001923 methylcellulose Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910000505 Al2TiO5 Inorganic materials 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 229910052792 caesium Inorganic materials 0.000 description 2
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000003779 heat-resistant material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 description 2
- 229910052701 rubidium Inorganic materials 0.000 description 2
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 101100481408 Danio rerio tie2 gene Proteins 0.000 description 1
- 101100481410 Mus musculus Tek gene Proteins 0.000 description 1
- MXRIRQGCELJRSN-UHFFFAOYSA-N O.O.O.[Al] Chemical compound O.O.O.[Al] MXRIRQGCELJRSN-UHFFFAOYSA-N 0.000 description 1
- 239000004264 Petrolatum Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical group 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229940066842 petrolatum Drugs 0.000 description 1
- 235000019271 petrolatum Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 150000004684 trihydrates Chemical class 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、熱膨張係数が小で、耐熱衝撃性に優れるセラ
ミックスの提供可能な組成物に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a composition capable of providing ceramics having a small coefficient of thermal expansion and excellent thermal shock resistance.
従来の技術
従来の熱膨張係数の小さな耐熱衝撃性に優れたセラミッ
クスとしては、コーディエライトセラミックス、リチア
系セラミックス、チタン酸アルミニウムセラミックス等
が一般的で、これらが最もよく使用されている。コーデ
ィエライトセラミックスとは、ＭｇＯ−Ａ１２０３−５
ｉｎ２系からなるセラミックスであり、リチア系セラミ
ックスとは、Ｌｉ２０−人７１２０３−３ｉｎ２系セラ
ばツクスである。コーディエライトは、タルク（Ｍｇ５
（ＳｉａＯｌ。）（ＯＨ）２ ） とカオリン（Ａｅ
２Ｓ１２０５（ＯＨ）４）オヨびアルミナ（Ａ１２０．
）を任意の比率で調合し、混合、脱水、成形、乾燥。BACKGROUND OF THE INVENTION Conventional ceramics with a small coefficient of thermal expansion and excellent thermal shock resistance include cordierite ceramics, lithium ceramics, and aluminum titanate ceramics, which are most commonly used. Cordierite ceramics is MgO-A1203-5
It is a ceramic made of in2 series, and the lithium ceramics is Li20-71203-3in2 series ceramics. Cordierite is talc (Mg5
(SiaOl.)(OH)2) and kaolin (Ae
2S1205(OH)4) Oyobi Alumina (A120.
) in any ratio, mix, dehydrate, mold, and dry.
焼結して製造される。ちなみに焼結は、約１４００°Ｃ
で４〜６日間である（特公昭５４−１５６４号公報、特
公昭５１−２０３５８号公報）。また。Manufactured by sintering. By the way, sintering is approximately 1400°C.
(Japanese Patent Publication No. 54-1564, Japanese Patent Publication No. 51-20358). Also.
チタン酸アルミニウムセラミックスとは、酸化チタン（
アナターゼ型）と純度のよいα−アルミナを原料として
、等モル調合物１１６００〜１７ｏＯ°Ｃで焼成して製
造される（窯業工学ハンドブックＰ、１２７４）。Aluminum titanate ceramics are titanium oxide (
It is produced by firing an equimolar mixture at 11,600 to 170°C (Ceramics Engineering Handbook P, 1274) using α-alumina of high purity and anatase type (anatase type) as raw materials.
発明が解決しようとする問題点
このような従来耐熱衝撃性セラミックスは、いずれも高
温で長時間、焼結することにより始めて機械的強度が得
られる。Problems to be Solved by the Invention All of these conventional thermal shock-resistant ceramics can only gain mechanical strength by sintering them at high temperatures for a long period of time.
また合成されたセラミックスからは緻密な焼結体が得ら
れなかったり、構成結晶の熱膨張の大きな異方性によっ
てできる粒界の亀裂等より、耐熱衝撃性に問題を有して
いた。Moreover, the synthesized ceramics have problems in thermal shock resistance, such as not being able to obtain a dense sintered body, and cracks at grain boundaries caused by the large anisotropy of thermal expansion of the constituent crystals.
卓。Table.
問題を解決するための手段
本発明は上記問題点を解決するため、少なくとも再水和
性アルミナとチタン酸アルカリ塩からなる組成物ヲ■焼
して得るものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a composition obtained by firing a composition comprising at least rehydratable alumina and an alkali titanate salt.
作用
本発明は上記の構成よりなり、本発明の必須成分である
再水和性アルミナとは、アルミナ水和物を熱分解したα
−アルミナ以外の遷移アルミナ、例えばρ−アルミナお
よび無定形アルミナ等を意味する。工業的には例えばバ
イヤ一工程から得られるアルミナ三水和物等のアルミナ
水和物を約４００〜１２００°Ｃの熱ガスに通常数分の
１〜１０秒間接触させたり、あるいはアルミナ水和物を
減圧下で約２５０〜９００ ℃に通常１分〜４時間加熱
保持することにより得ることができる約０．６〜１５重
量％の灼熱減量を有するもの等が挙げられる。次に本発
明におけるもう一つの必須成分であるチタン酸アルカリ
塩とｉ１１″、一般式Ｍ′２０・ｎＴｉｏ２（式中Ｍ′
はリチウム、ナトリウム、カリウム、ルビジウム、セシ
ウム、バリウム、ストロンチウム、カルシウムから選ば
れるアルカリ金属原子を表わし、ｎは１以上の整数であ
る）で示される。Function The present invention has the above-mentioned structure, and the rehydratable alumina, which is an essential component of the present invention, is α
- means transitional aluminas other than alumina, such as ρ-alumina and amorphous alumina. Industrially, for example, alumina hydrate such as alumina trihydrate obtained from the Bayer step is brought into contact with hot gas at about 400 to 1200°C for usually a fraction of a second to 10 seconds, or alumina hydrate is Examples include those having a loss on ignition of about 0.6 to 15% by weight, which can be obtained by heating and holding at about 250 to 900°C under reduced pressure for usually 1 minute to 4 hours. Next, the alkaline titanate salt, which is another essential component in the present invention, and i11'', the general formula M'20・nTio2 (in the formula M'
represents an alkali metal atom selected from lithium, sodium, potassium, rubidium, cesium, barium, strontium, and calcium, and n is an integer of 1 or more.
上記少なくとも二成分からなる組成物ｔａ焼することに
より耐熱衝撃性組成物が得られるがこの理由は明らかで
はない。木＃―；前記再水和性アルミナとチタン酸アル
カリ塩の他に、成形助剤（たとえば、Ｃ；ＭＯ、ＭＯ）
および可塑剤（グリセリン、ワセリン）等を添加するこ
とも可能である。また、骨材として合成コーディエライ
ト粉末。A thermal shock resistant composition can be obtained by baking a composition comprising at least two of the above components, but the reason for this is not clear. Wood #: In addition to the rehydratable alumina and alkali titanate, a forming aid (for example, C; MO, MO)
It is also possible to add a plasticizer (glycerin, petrolatum), etc. We also use synthetic cordierite powder as aggregate.
ムライト粉末等耐熱性材料を添加することも可能である
。通常これらの耐熱性材料を骨材として、たとえばセメ
ント材等の結合剤とからなる組成物を■焼または、焼結
するとセメント剤とたとえば合成コージイエライト粉末
とは反応を起し、新たな組成物を生成することが一般的
に知られている。It is also possible to add heat-resistant materials such as mullite powder. Normally, when a composition consisting of these heat-resistant materials as aggregates and a binder such as cement material is sintered or sintered, the cement material and synthetic cordierite powder, for example, react and form a new composition. Generally known to produce things.
しかしながら、本願発明組成物との組合せでは、このよ
うな現象は認め得なかった。However, such a phenomenon could not be observed in combination with the composition of the present invention.
幸瀬再水和性アルミナとチタン酸アルカリ塩との混合比
率は、（１：１）〜（１０：１）の範囲が耐圧強度、耐
熱衝撃性の観点より最適である。The optimum mixing ratio of Kose rehydratable alumina and alkali titanate is in the range of (1:1) to (10:1) from the viewpoint of compressive strength and thermal shock resistance.
また、骨材として合成コーディエライト粉末、ムライト
粉末、シリカ系シャモット、ジルコニア系シャモット等
を加える場合においても再水和性アルミナとチタン酸ア
ルカリ塩との比率は（１：１）〜（１：１０）の範囲が
好ましく、また、再水利。Furthermore, even when synthetic cordierite powder, mullite powder, silica-based chamotte, zirconia-based chamotte, etc. are added as aggregates, the ratio of rehydratable alumina to alkali titanate is between (1:1) and (1:1). The range of 10) is preferable, and also for rewatering.
性アルミナとチタン酸アルカリ塩との総量としては、耐
圧強度、耐熱衝撃性の観点より１０重量％再水和性アル
ミナ５０重量％とチタン酸カリウム（Ｋ２Ｏ・６ＴｉＯ
２） ５０重量％、さらに成形助剤としてメチルセルロ
ース″４．ｏ重量部および可塑剤としてグリセリン２．
０重量部、さらに水３２重量部加えた混合物をスクリュ
ーニーダを用い１０分分間混練ススクリユー押出成形機
に供給し、φ１００χで長さ１ｏｏｒｙｎで、壁厚０．
３％、−辺１．５％の 。From the viewpoint of compressive strength and thermal shock resistance, the total amount of rehydratable alumina and alkali titanate is 10% by weight, 50% by weight of rehydratable alumina, and potassium titanate (K2O.6TiO).
2) 50% by weight, plus 4.0 parts by weight of methylcellulose as a molding aid and 2.0 parts by weight of glycerin as a plasticizer.
A mixture of 0 parts by weight and 32 parts by weight of water was kneaded using a screw kneader for 10 minutes and fed to a screw extrusion molding machine, with a diameter of 100χ, a length of 1oooryn, and a wall thickness of 0.
3%, -side 1.5%.
正方形セルからなるハニカム成形体を成形した。
”次いでこの成形体を１００℃／時間の昇温速
度で、２゜。。。ｔ−、、ア。、Ｊ！１ｃ１２００゜。A honeycomb molded body consisting of square cells was molded.
``Next, this molded body was heated to 2°...t-,,a.,J!1c1200° at a heating rate of 100°C/hour.
ア、よ ■焼した。この様にして得られたハニカ
ム状構造体の物性を第１表に示す。Ah, yo ■I baked it. Table 1 shows the physical properties of the honeycomb structure thus obtained.
また比較のため、再水和性アルミナのがわりにα−アル
ミナ粉末を使用した比較何人、チタン酸カリウムのかわ
りに酸化チタン（ルチル型Ｔｉｅ２）を使用した比較例
Ｂを前記実施例と同様にしてハニカム状構造物を製造し
た。この時の物性も第１表に示す。For comparison, a comparison sample using α-alumina powder instead of rehydratable alumina, and a comparison example B using titanium oxide (rutile type Tie2) instead of potassium titanate were prepared in the same manner as in the previous example. A honeycomb-like structure was produced. The physical properties at this time are also shown in Table 1.
（以下余白）
第１表から明らかなように織・須成分である再水和性ア
ルミナとチタン酸アルカリ塩からなる組成物以外の比較
例ム、比較例Ｂ組成物は、耐圧強度が小さく、また熱膨
張係数が大きく熱衝撃性が極端に悪かった。(Leaving space below) As is clear from Table 1, the compositions of Comparative Example M and Comparative Example B, other than the compositions consisting of rehydratable alumina and alkali titanate, which are textile components, have low compressive strength. Furthermore, the coefficient of thermal expansion was large and the thermal shock resistance was extremely poor.
〈実施例２〉
再水和性アルミナ３０重量％とチタン酸カリウム（Ｋ２
Ｏ・６ＴｉＯ２） ３０重量％、さらに合成コーディエ
ライト粉末４０重量％と成形助剤としてメチルセルロー
ス４．０重量部、可塑剤としてグリセリン２．０重量部
、水３１重量部加えた混合物を実施例１と同様にして、
ハニカム構造体を製造した（サンプルＮｏ、１）。また
前記組成で合成コーディエライト粉末４０重量％の代り
にムライト粉末４０重量％を添加したものについても実
施例１と同様にしてハニカム構造体を製造した（サンプ
ルＮｏ、２）。この時の物性を第２表に示す。<Example 2> 30% by weight of rehydratable alumina and potassium titanate (K2
Example 1 A mixture was prepared by adding 30% by weight of O.6TiO2), 40% by weight of synthetic cordierite powder, 4.0 parts by weight of methylcellulose as a molding aid, 2.0 parts by weight of glycerin as a plasticizer, and 31 parts by weight of water. Similarly,
A honeycomb structure was manufactured (Sample No. 1). Further, a honeycomb structure was also produced in the same manner as in Example 1 using the same composition except that 40% by weight of mullite powder was added instead of 40% by weight of synthetic cordierite powder (Sample No. 2). The physical properties at this time are shown in Table 2.
（以下余白）
第２表から明らかなように、骨材として、合成コーディ
エライト粉末、ムライト粉末を使用しても、装置必須成
分との組合せであれば、耐圧強度。(Left below) As is clear from Table 2, even if synthetic cordierite powder or mullite powder is used as aggregate, the compressive strength will be the same as long as it is combined with the essential components of the device.
熱衝撃性に優れたセラミックであった。なお、上記合成
コーディエライト粉末、ムライト粉末を含む組成物にお
いて、実施例１同様、再水和性アルミナの代りにα−ア
ルミナを、チタン酸アルカリ塩の代わりに酸化チタン（
アナターゼ型）を使用したものも検討したが、実施例１
における比較例ム、比較例Ｂ同様、耐圧強度、熱衝撃性
に満足できるものは得られなかった。It was a ceramic with excellent thermal shock resistance. In addition, in the composition containing the synthetic cordierite powder and mullite powder, as in Example 1, α-alumina was used instead of rehydratable alumina, and titanium oxide (
Anatase type) was also considered, but Example 1
Similar to Comparative Example M and Comparative Example B, no product with satisfactory compressive strength and thermal shock resistance was obtained.
〈実施例３〉
再水和性アルミナ６０重量％とチタン酸アルカリ塩６０
重量％（アルカリ成分として、リチウム。<Example 3> 60% by weight of rehydratable alumina and 60% by weight of alkali titanate
% by weight (lithium as alkaline component.
ナトリウム、カリウム、ルビジウム、セシウム。Sodium, potassium, rubidium, cesium.
バリウム、ストロンチウム、カルシウムから選ばれる各
々のアルカリ金属原子からなるチタン酸アルカリ塩）と
、成形助剤としてメチルセルロース４．０重量部および
可塑剤としてグリセリン２．６重量部、水３２重量部加
えた混合物全実施例１と同様にして、ハニカム構造体を
製造した。このものの物性を第３表に示す。A mixture of 4.0 parts by weight of methylcellulose as a molding aid, 2.6 parts by weight of glycerin as a plasticizer, and 32 parts by weight of water. A honeycomb structure was manufactured in the same manner as in Example 1. The physical properties of this product are shown in Table 3.
（以下余白）
第３表から明らかなように４再水和性アルミナと各々の
チタン酸アルカリ塩からなる組成物は、耐圧強度、熱衝
撃性に優れている。なかでも、チタン酸カリウム全使用
したものは、著しく熱膨張係数が小さく熱衝撃性に優れ
ていた。(The following is a blank space) As is clear from Table 3, the compositions consisting of the 4 rehydratable alumina and each alkali titanate salt are excellent in compressive strength and thermal shock resistance. Among them, those using all potassium titanate had a significantly small coefficient of thermal expansion and excellent thermal shock resistance.
〈実施例４〉
実施例３における各々のチタン酸アルカリ塩が繊維状で
ある場合の物性を第４表に示す。なお試験用ハニカム構
造体の製法は実施例１と同様に行った。<Example 4> Table 4 shows the physical properties of each of the alkali titanate salts in Example 3 in the form of fibers. The honeycomb structure for testing was manufactured in the same manner as in Example 1.
（以下余白）
第４表よりチタン酸アルカリ塩が繊維状である程熱膨張
係数が小さくなり耐熱衝撃性も改善されていることが認
められた。(The following is a blank space) From Table 4, it was recognized that the more fibrous the alkali titanate salt is, the smaller the coefficient of thermal expansion becomes and the better the thermal shock resistance becomes.
〈実施例５〉
実施例１の−・ニカム成形体において、■焼温度が９０
０〜１４ｏＯ°Ｃの範囲での各物性全第１図に示した。<Example 5> In the Nicum molded product of Example 1, the baking temperature was 90°C.
All physical properties in the range of 0 to 14oO°C are shown in FIG.
第１図から明らかなように■焼温度１ｏ○０°Ｃ以下で
は、耐圧強度が急激に小さくな下した。このように１本
定、」熱衝撃性セラミックスは■焼温度１０ｏｏ〜１３
００℃で製造されたものがもっとも優れていた。なお、
９００℃で収焼して得たハニカム状セラミックスおよび
１０００°Ｃで■焼して得た・・ニカム状セラミックス
断面の走査型電子顕微鏡写真を第２図に示した。第２図
人は、９００℃で■焼して得たハニカム状セラミックス
断面の１ｏＯｏ倍拡大の走査型電子顕微鏡写真である。As is clear from FIG. 1, when the firing temperature was below 1°C, the compressive strength decreased rapidly. In this way, one piece is fixed, and the thermal shock ceramics are fired at a firing temperature of 10 to 13 degrees.
The one produced at 00°C was the best. In addition,
Figure 2 shows scanning electron micrographs of the cross sections of the honeycomb-shaped ceramics obtained by firing at 900°C and the honeycomb-shaped ceramics obtained by firing at 1000°C. Figure 2 is a scanning electron micrograph, magnified 100 times, of a cross section of a honeycomb-shaped ceramic obtained by firing at 900°C.
第２図Ｂは１２００′Ｃ′Ｔ：収焼して得たハニカム状
セラミックス断面の１０００倍拡大の走査型電子顕微鏡
写真である。前記２つの走査型電子顕微鏡写真からも、
収焼温度によって得られるセラミックスの物性が大きく
異なることは容易に推察される。第２図人からチタン酸
カリウム四９責ＪＦ！、り１第２図Ｂでは、繊維が完全
に融解し、＾
一体化されたため、ウィスカー等の繊維状態は認められ
なかった。FIG. 2B is a scanning electron micrograph of a cross section of the honeycomb-shaped ceramic obtained by burning at 1200'C'T, magnified 1000 times. From the above two scanning electron micrographs,
It is easily inferred that the physical properties of the ceramics obtained vary greatly depending on the firing temperature. Figure 2 Potassium titanate 49 charges from people JF! In Figure 2B of Figure 1, the fibers were completely melted and integrated, so no fibers such as whiskers were observed.
発明の効果
以上述べてきたように、本発明によれば、耐熱衝撃性セ
ラミックスを比較的低温で■焼することができ、緻密で
耐熱衝撃性、耐圧強度に優れた低コストで実用的なセラ
ミックスを得ることが可能できわめて有用である。Effects of the Invention As described above, according to the present invention, thermal shock-resistant ceramics can be fired at a relatively low temperature, and a low-cost, practical ceramic that is dense, has excellent thermal shock resistance, and compressive strength can be produced. It is possible to obtain and is extremely useful.
Claims (4)
塩からなる組成物を■焼して得られる耐熱衝撃性セラミ
ックス。(1) A thermal shock-resistant ceramic obtained by firing a composition consisting of at least rehydratable alumina and an alkali titanate.
とを特徴とする特許請求の範囲第１項記載の耐熱衝撃性
セラミックス。(2) The thermal shock-resistant ceramic according to claim 1, wherein the alkali titanate is potassium titanate.
する特許請求の範囲第１項または第２項記載の耐熱衝撃
性セラミックス。(3) The thermal shock-resistant ceramic according to claim 1 or 2, wherein the alkali titanate salt is fibrous.
徴とする特許請求の範囲第１項、第２項または第３項記
載の耐熱衝撃性セラミックス。(4) ■ The thermal shock-resistant ceramic according to claim 1, 2, or 3, characterized in that the firing temperature is 1000 to 1300°C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60113613A JPH0688833B2 (en) | 1985-05-27 | 1985-05-27 | Thermal shock resistance ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60113613A JPH0688833B2 (en) | 1985-05-27 | 1985-05-27 | Thermal shock resistance ceramics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61270256A true JPS61270256A (en) | 1986-11-29 |
| JPH0688833B2 JPH0688833B2 (en) | 1994-11-09 |
Family
ID=14616653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60113613A Expired - Lifetime JPH0688833B2 (en) | 1985-05-27 | 1985-05-27 | Thermal shock resistance ceramics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0688833B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0231006A2 (en) * | 1986-01-28 | 1987-08-05 | Matsushita Electric Industrial Co., Ltd. | Method for producing ceramics with thermal shock resistance |
| CN100390104C (en) * | 2005-10-11 | 2008-05-28 | 山东大学 | Composite heat insulating aluminium silicate fiber/potassium hexatitanate whisker material and its prepn |
| WO2012144553A1 (en) * | 2011-04-22 | 2012-10-26 | 東邦マテリアル株式会社 | Method for producing complex metal oxide, metal oxide sintered body, and rotary kiln |
-
1985
- 1985-05-27 JP JP60113613A patent/JPH0688833B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0231006A2 (en) * | 1986-01-28 | 1987-08-05 | Matsushita Electric Industrial Co., Ltd. | Method for producing ceramics with thermal shock resistance |
| CN100390104C (en) * | 2005-10-11 | 2008-05-28 | 山东大学 | Composite heat insulating aluminium silicate fiber/potassium hexatitanate whisker material and its prepn |
| WO2012144553A1 (en) * | 2011-04-22 | 2012-10-26 | 東邦マテリアル株式会社 | Method for producing complex metal oxide, metal oxide sintered body, and rotary kiln |
| CN103459352A (en) * | 2011-04-22 | 2013-12-18 | 东邦原材料株式会社 | Method for producing complex metal oxide, metal oxide sintered body, and rotary kiln |
| CN103459352B (en) * | 2011-04-22 | 2016-03-02 | 东邦原材料株式会社 | The preparation method of complex metal oxides, metal oxide sintered body and rotary kiln |
| JP5919261B2 (en) * | 2011-04-22 | 2016-05-18 | 東邦マテリアル株式会社 | Method for producing composite metal oxide, metal oxide sintered body, and rotary kiln |
| US9598320B2 (en) | 2011-04-22 | 2017-03-21 | Toho Material Co., Ltd. | Method of producing composite metal oxide, metal oxide sintered body, and rotary kiln |
| KR20180053414A (en) * | 2011-04-22 | 2018-05-21 | 도호 머티리얼 가부시키가이샤 | Method for producing complex metal oxide, metal oxide sintered body, and rotary kiln |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0688833B2 (en) | 1994-11-09 |
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