JP2010138060A - チタン酸アルミニウム系セラミックスの製造方法 - Google Patents
チタン酸アルミニウム系セラミックスの製造方法 Download PDFInfo
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- JP2010138060A JP2010138060A JP2009204163A JP2009204163A JP2010138060A JP 2010138060 A JP2010138060 A JP 2010138060A JP 2009204163 A JP2009204163 A JP 2009204163A JP 2009204163 A JP2009204163 A JP 2009204163A JP 2010138060 A JP2010138060 A JP 2010138060A
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Abstract
【解決手段】チタン源物質およびアルミニウム源物質を含む原材料混合物を焼成してチタン酸アルミニウム系セラミックスを製造する方法であって、前記アルミニウム源物質のBET比表面積が0.1m2/g以上5m2/g以下である方法である。
【選択図】なし
Description
AT化率(%)=100×IAT/(IAT +IT)・・・(1)
収縮率(%)=100×((H−H0)+(A−A0))/2・・・(2)
BET比表面積が15.2m2/gである酸化チタン粉末〔デュポン(株) 製、「R−900」〕4810g、BET比表面積が0.6m2/g、二次粒子径43μmであるαアルミナ粉末4093g、マグネシア粉末〔宇部興産(株) 製、「UC−95S」〕405gおよび屈服点が852℃(カタログ値)であるガラスフリット〔タカラスタンダード(株)製、「CF−0043M2」〕693gを、直径15mmのアルミナボール80kgとともに、内容量50Lのアルミナ製粉砕容器に投入した。原料混合物の合計容量は10Lであった。その後、粉砕容器を振動ミルにより振幅10mm、振動数1200回/分、動力5.5kWにて30分間振動させることにより粉砕容器内の原料混合物を粉砕しながら混合した。この原材料混合物3gを一軸成形機にて、0.3t/cm2の成形圧力にて成形し、直径(A0)約20mm、高さ(H0)約5mmの原材料成形体を得た。この原材料成形体を大気中、箱型電気炉により昇温速度300℃/時間で1450℃まで昇温し、同温度を4時間保持することにより焼成した。その後、室温まで放冷して、実施例1のセラミックス焼成体を得た。また原材料混合物を同条件で焼成し、得られた焼成物について粉末X線回折法で回折スペクトルを求めたところ、AT化率は100%であった。また実施例1のセラミックス焼成体の収縮率と熱膨張率は、それぞれ8.6%、−0.72×10-6〔K-1〕であり、低熱膨張率と低収縮率を達成できた。また得られたチタン酸アルミニウムマグネシウムを(Al2(1-x)MgxTi(1+x)O5)と表した場合のxの値は0.20であった。
実施例1で使用したαアルミナ粉末に代えて、BET比表面積が6.2m2/gのαアルミナ粉末〔住友化学(株)製、「AES−12」〕を用いた以外は、実施例1と同じ条件にて比較例1のセラミックス焼成体を得た。粉末X線回折法で回折スペクトルを求めたところ、AT化率は100%であった。また比較例1のセラミックス焼成体の収縮率と熱膨張率は、それぞれ11.4%、−0.14×10-6〔K-1〕であり、収縮率が大きくなった。また上記xの値は0.20であった。
Claims (13)
- チタン源物質およびアルミニウム源物質を含む原材料混合物を焼成してチタン酸アルミニウム系セラミックスを製造する方法であり、前記アルミニウム源物質のBET比表面積が0.1m2/g以上5m2/g以下である方法。
- 前記アルミニウム源物質のBET比表面積が0.3m2/g以上3m2/g以下である請求項1に記載の方法。
- 前記原材料混合物を成形して原材料成形体を得、得られた原材料成形体を焼成する請求項1または2に記載の方法。
- チタニア換算のチタン源物質の使用量は、チタニア換算のチタン源物質の使用量およびアルミナ換算のアルミニウム源物質の使用量の合計100質量部あたり、30質量部以上70質量部以下である請求項1〜3のいずれか一項に記載の方法。
- チタン源物質のBET比表面積が0.1m2/g以上100m2/g以下である請求項1〜4のいずれか一項に記載の方法。
- 前記原材料混合物が、さらにマグネシウム源物質を含む請求項1〜5のいずれか一項に記載の方法。
- マグネシア換算のマグネシウム源物質の使用量は、チタニア換算のチタン源物質の使用量およびアルミナ換算のアルミニウム源物質の使用量の合計100質量部あたり、0.1質量部以上10質量部以下である請求項6に記載の方法。
- 原材料混合物が、さらにシリコン源物質を含む請求項1〜7のいずれか一項に記載の方法。
- 前記シリコン源物質が長石またはガラスフリットである請求項8に記載の方法。
- 前記ガラスフリットの屈服点が700℃以上である請求項9に記載の方法。
- 前記原材料混合物に対し、さらに振動ミルを用いた混合を行う請求項1〜10のいずれか一項に記載の方法。
- 前記振動ミルを用いた混合に際して、粉砕メディアとして粒子径1mm以上100mm以下のアルミナボールまたはジルコニアボールを用いる請求項11に記載の方法。
- 前記振動ミルを、2mm以上20mm以下の振幅幅で振動させる請求項11または12に記載の方法。
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JP2012036079A (ja) * | 2010-07-14 | 2012-02-23 | Sumitomo Chemical Co Ltd | グリーン成形体、および、チタン酸アルミニウム焼成体の製造方法 |
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US9623360B2 (en) | 2013-05-20 | 2017-04-18 | Corning Incorporated | Porous ceramic article and method of manufacturing the same |
US9908260B2 (en) | 2013-05-20 | 2018-03-06 | Corning Incorporated | Porous ceramic article and method of manufacturing the same |
US9376347B2 (en) | 2013-05-20 | 2016-06-28 | Corning Incorporated | Porous ceramic article and method of manufacturing the same |
US11229902B2 (en) | 2016-05-31 | 2022-01-25 | Corning Incorporated | Porous article and method of manufacturing the same |
CN111527055A (zh) | 2017-10-31 | 2020-08-11 | 康宁股份有限公司 | 包含预反应过的无机颗粒的批料组合物及由其制造生坯体的方法 |
US10676401B2 (en) * | 2018-04-23 | 2020-06-09 | Scientific Design Company, Inc. | Porous bodies with enhanced pore architecture prepared with oxalic acid |
JP2021160962A (ja) * | 2020-03-31 | 2021-10-11 | 住友化学株式会社 | 粒子、粉体組成物、固体組成物、液体組成物及び成形体 |
CN112979307B (zh) * | 2021-04-06 | 2022-08-05 | 济南大学 | 钛酸铝陶瓷前体料和钛酸铝致密陶瓷及其制造方法 |
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Publication number | Publication date |
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CN102143925A (zh) | 2011-08-03 |
JP4929327B2 (ja) | 2012-05-09 |
KR20110053313A (ko) | 2011-05-20 |
EP2322492A1 (en) | 2011-05-18 |
WO2010026982A1 (ja) | 2010-03-11 |
EP2322492A4 (en) | 2011-10-05 |
US20110156323A1 (en) | 2011-06-30 |
TW201026631A (en) | 2010-07-16 |
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