JP4704111B2 - 酸化物結合炭化珪素質材料 - Google Patents
酸化物結合炭化珪素質材料 Download PDFInfo
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- JP4704111B2 JP4704111B2 JP2005161327A JP2005161327A JP4704111B2 JP 4704111 B2 JP4704111 B2 JP 4704111B2 JP 2005161327 A JP2005161327 A JP 2005161327A JP 2005161327 A JP2005161327 A JP 2005161327A JP 4704111 B2 JP4704111 B2 JP 4704111B2
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- silicon carbide
- oxide
- bonded
- carbide material
- bonded silicon
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- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
- C04B2235/9684—Oxidation resistance
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Description
SiC及びSiO2を焼成後に表1に示す組成になるように調製するとともに、微量成分として、表1に示す添加剤を酸化物換算で1質量%添加し、更に分散材(物質名:ポリカルボン酸アンモニウム)、バインダー(物質名:ポリアクリル酸エマルジョン)及び水を添加したものを50kgボールミルにて、24時間混合し、泥漿をそれぞれ得た。得られた泥漿を、真空中で30分間脱泡処理を施した後、石膏型に泥漿を注泥する鋳込み成形で、成形体をそれぞれ得た。得られた成形体を大気雰囲気下で1400℃焼成することにより、酸化物結合炭化珪素質材料である焼結体(サイズ:400mm×400mm×10mm)を得た。それぞれ得られた焼結体の特性(嵩比重、常温及び1300℃における曲げ強度、1300℃における耐酸化性、耐クリープ性及び耐熱衝撃温度)を測定し、その結果を表1に示す。
(1)焼結体の密度(嵩密度)の測定
『JIS R 2205 耐火れんがの見掛気孔率・吸水率・比重の測定方法』により密度(嵩比重)を測定した。
(2)焼結体の曲げ強度試験
『JIS R 1601 ファインセラミックスの曲げ強さ試験方法』における4点曲げ強さにて測定した。
表1に示すように、実施例1〜8は、微量成分として、原子番号22から29までの遷移金属元素であるTi、V、Cr、Mn、Fe、Co、Ni、Cuが泥漿に添加することにより、得られた焼結体のすべての特性(常温及び1300℃における曲げ強度、1300℃における耐酸化性、耐クリープ性及び耐熱衝撃温度)が良好であった。一方、比較例1〜3では、得られた焼結体の特性が不十分であった。
表2に示す粒子配合を有するSiC、SiO2及びV2O5を、焼成後に表2に示す組成になるように調製し、更に分散材(物質名:ポリカルボン酸アンモニウム)、バインダー(物質名:ポリアクリル酸エマルジョン)及び水を添加したものを50kgボールミルにて、24時間混合し、泥漿をそれぞれ得た。得られた泥漿を、真空中で30分間脱泡処理を施した後、石膏型に泥漿を注泥する鋳込み成形で、成形体をそれぞれ得た。得られた成形体を大気雰囲気下で1400℃焼成することにより、酸化物結合炭化珪素質材料である焼結体(サイズ:400mm×400mm×10mm)を得た。それぞれ得られた焼結体の特性(嵩比重、常温及び1300℃における曲げ強度、1300℃における耐酸化性、耐クリープ性及び耐熱衝撃温度)を測定し、その結果を表2に示す。尚、実施例17は、実施例2と同様である。
表2の結果から、実施例9〜21は、最大粒子径50〜200μmの骨材粒子に、最大粒子径10μm以下の微細粒子を添加したSiCと、焼成後の組成が0.45〜10.0質量%のSiO2及び0.05〜5.0質量%のV2O5になるように調製された泥漿を鋳込み成形した後、焼成することにより、得られた焼結体のすべての特性(常温及び1300℃における曲げ強度、1300℃における耐酸化性、耐クリープ性及び耐熱衝撃温度)が良好であった。一方、比較例4〜28では、得られた焼結体の特性のいずれかが不十分であった。
実施例2で得られた酸化物結合炭化珪素質材料(焼結体)の微構造をSEM(走査型電子顕微鏡)で観察した。その結果を図1に示す。一方、比較例29は、日本ガイシ株式会社からカタロンの商品名で市販されている酸化物結合炭化珪素材料の微構造をSEM(走査型電子顕微鏡)で観察したものである。その結果を図2に示す。
実施例2で得られた酸化物結合炭化珪素質材料(焼結体)の微構造は、図1に示すように、焼成時における骨材である炭化珪素結晶粒子と結合部である二酸化珪素との組織を制御して、緻密に焼結することができた。一方、比較例29は、図2に示すように、焼成時において骨材であるSiC粒子間の結合部を構成する二酸化珪素とSiC微粒部が非常に気孔が多量の存在する状態で、緻密に焼結させることが困難であった。
Claims (5)
- 炭化珪素から実質的に構成され、前記炭化珪素の結晶粒子とその粒界部及び気孔とを有し、且つ前記炭化珪素の結晶粒子を、二酸化珪素を主成分とする酸化物で結合した構造を有する酸化物結合炭化珪素質材料であって、
前記炭化珪素の結晶粒子が、実質的に粒径の大きな骨材と、微細な炭化珪素の結晶粒子からなる微粒とを含有する混合粒子であり、且つ前記骨材の最大粒子径が、50〜200μmであるとともに、前記微粒の最大粒子径が10μm以下であり、
炭化珪素が85〜99.5質量%、二酸化珪素が0.45〜10質量%、微量成分として原子番号22から29までの遷移金属元素から選択される1種以上を酸化物換算で0.05〜5.0質量%からなり、
常温及び高温時における曲げ強度が100MPa以上であり、且つ嵩比重が2.65以上である酸化物結合炭化珪素質材料。 - 前記骨材の周辺部に、前記微粒が均一に分散され、且つ前記結合部が、前記微粒と前記二酸化珪素を主成分とする酸化物とを混在させた構造を有する請求項1に記載の酸化物結合炭化珪素質材料。
- 前記炭化珪素の結晶粒子間を結合する結合部が、前記二酸化珪素を主成分とする酸化物で構成され、且つ前記結合部に、微量成分として原子番号22から29までの遷移金属元素から選択される少なくとも1種以上含有する請求項1又は2に記載の酸化物結合炭化珪素質材料。
- 原子番号22から29までの遷移金属元素から選択される1種以上を含有する二酸化珪素を主成分とする皮膜が、表面に形成されている請求項1〜3のいずれか1項に記載の酸化物結合炭化珪素質材料。
- 前記酸化物結合炭化珪素質材料の前駆体である成形体を、鋳込み成形した後、大気雰囲気下で焼成する請求項1〜4のいずれか1項に記載の酸化物結合炭化珪素質材料。
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| CNB2006100825480A CN100393668C (zh) | 2005-06-01 | 2006-05-17 | 氧化物结合碳化硅质材料 |
| EP20060114683 EP1728774B8 (en) | 2005-06-01 | 2006-05-30 | Oxide-bonded silicon carbide material |
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| EP2138474B1 (en) * | 2008-06-23 | 2018-08-08 | Imerys Kiln Furniture Hungary Ltd. | Sic material |
| CN101423412B (zh) * | 2008-11-27 | 2012-07-11 | 中钢集团洛阳耐火材料研究院有限公司 | 低温烧成制备高性能氧化硅结合碳化硅耐火材料的方法 |
| WO2011082102A1 (en) * | 2009-12-31 | 2011-07-07 | Oxane Materials, Inc. | Ceramic particles with controlled pore and/or microsphere placement and/or size and method of making same |
| FR2973369B1 (fr) * | 2011-03-31 | 2013-04-05 | Saint Gobain Ct Recherches | Produit fritte vitrifie |
| CN104987097A (zh) * | 2015-07-30 | 2015-10-21 | 武汉科技大学 | 一种氮化硅结合碳化硅耐火材料及其制备方法 |
| JP2019529320A (ja) * | 2016-09-30 | 2019-10-17 | サン−ゴバン セラミックス アンド プラスティクス,インコーポレイティド | セラミック構成要素およびその形成方法 |
| US11292749B2 (en) * | 2017-01-18 | 2022-04-05 | The University Of North Carolina At Charlotte | Composite carbide compositions and methods of making the same |
| JP7220527B2 (ja) * | 2017-06-30 | 2023-02-10 | クアーズテック株式会社 | 焼成用道具材 |
| US11285242B1 (en) | 2019-12-20 | 2022-03-29 | The University Of North Carolina At Charlotte | Processing and bioactivation of a novel SiC medical device |
| JP7515087B2 (ja) * | 2020-05-27 | 2024-07-12 | パナソニックIpマネジメント株式会社 | 無機構造体及びその製造方法 |
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| JPH04164862A (ja) * | 1990-10-25 | 1992-06-10 | Ngk Insulators Ltd | 炭化硅素耐火物 |
| CN1018477B (zh) * | 1991-03-19 | 1992-09-30 | 山东省冶金设计研究院 | 碳化硅基复合陶瓷热电偶保护管的生产工艺 |
| JP3142360B2 (ja) * | 1992-03-25 | 2001-03-07 | 日本碍子株式会社 | SiC質耐火物原料とその調製方法、及び該耐火物原料を用いて得られるSiC質耐火物 |
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| JPH07187785A (ja) * | 1993-12-27 | 1995-07-25 | Ngk Insulators Ltd | SiC質耐火物 |
| JP3373312B2 (ja) * | 1994-12-27 | 2003-02-04 | 日本碍子株式会社 | SiC質窯道具とその製造方法 |
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| EP1728774B1 (en) | 2009-08-05 |
| JP2006335594A (ja) | 2006-12-14 |
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