JP5481137B2 - 窒化珪素・メリライト複合焼結体 - Google Patents
窒化珪素・メリライト複合焼結体 Download PDFInfo
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Description
ここで、窒化珪素の主ピーク回折強度aとは、窒化珪素のピークのうち最も高いピークの回折強度をいい、また、メリライトの主ピーク回折強度bとは、メリライトのピークのうち最も高いピークの回折強度をいう。
50≦[b/(a+b)]×100≦98を満足していることが好ましい。この場合、焼結体は、2〜6ppm/Kの範囲の任意の平均熱膨張係数(23〜150℃)を有することができる。
平均粒径0.7μmの窒化珪素(Si3N4)粉末、平均粒径1.2μmのイットリア(Y2O3)粉末、SrCO3粉末、La2O3粉末、CeO2粉末およびAl2O3粉末を用い、表1〜表5に示す組成の混合粉末を得た。得られた混合粉末とエタノールを、ボールミル容器中に投入し混合した後、加熱乾燥し、造粒した。
[理論密度比]
焼結体の寸法および重量を測定し、理論密度(イットリア(Y2O3)粉末がすべてメリライト(Me2Si3O3N4)に変換され、残りの窒化珪素はそのままで、その他添加物は各酸化物の状態で存在したと仮定して計算)に対する比率を算出した。
焼結体に吸水処理(水中にて脱泡)を行った後、乾燥させ、次式により算出した。
吸水率(%)=[(W1−W2)/W2)]×100
(W1:吸水処理後の焼結体重量、W2:乾燥後の焼結体重量)
[メリライト主ピーク強度比率]
焼結体を粉砕し、X線回折装置((株)リガク製 RU−200T)により、粉末X線回折を行い、メリライト(Me2Si3O3N4)の主ピーク回折強度bおよびSi3N4の主ピーク回折強度aを求め、次式より算出した。
メリライト主ピーク強度比率(%)=[b/(a+b)]×100
熱膨張係数測定機((株)リガク製 熱機械分析装置 8310シリーズ)を用いて、圧縮荷重法にて23〜150℃の平均熱膨張係数を求めた。
[曲げ強度]
JIS R 1601に準拠して室温(23℃)で測定した
[ヤング率]
JIS R 1602に規定する超音波パルス法により室温(23℃)で測定した。
3mm×4mm×10mmの形状に切断した焼結体の4mm×10mmの表面に鏡面加工を施した後、その表面をSEM(日本電子(株)製 JSM−6460LA)にて観察し、さらにEPMA(日本電子(株)製 JXA−8500F)を用いて二次電子像、反射電子像の観察、及びWDS(波長分散型X線分光器)ビームスキャンマッピングを行い、その表面における窒化珪素結晶相、メリライト結晶相、並びに、ガラス相及び窒化珪素とメリライト以外の結晶相(表中、「その他」と記載)の面積比を求めた。なお、必要に応じて(ガラス相や窒化珪素とメリライト以外の結晶相が多く、前記機器による観察だけでは面積比を求めることが困難である場合等)、STEM(走査型透過電子顕微鏡)((株)日立ハイテクノロジーズ製HD−2000)及びEDS(エネルギー分散型X線分析装置)(EDAX製Genesis)を用いた。また、場合により、鏡面加工面にエッチング処理を行い、このエッチング面をSEM等で観察して面積比を求めた。
Claims (11)
- 窒化珪素結晶相と、メリライト結晶相(Me2Si3O3N4、Meは、メリライトを形成する金属元素であって、La,Ce,Prを除く周期表IIIa族元素)と、粒界相とを有する複合焼結体であって、
前記複合焼結体の切断面における前記メリライト結晶相の占める割合が、20%以上であり、
前記複合焼結体の吸水率が1.5%以下であり、
前記切断面における前記メリライト結晶相の占める割合と、前記切断面における前記窒化珪素結晶相の占める割合との和が、80%以上であり、
SiをSi3N4換算で41〜83モル%、Meを酸化物換算で13〜50モル%、含有し、
平均熱膨張係数(23〜150℃)が2〜6ppm/Kであること、
を特徴とする窒化珪素・メリライト複合焼結体。 - Siを、Si3N4換算で41〜79モル%、
Meを、酸化物換算で13〜46モル%、
添加物として、周期表IIa族元素を、酸化物換算で5〜20モル%、
含有する請求項1に記載の窒化珪素・メリライト複合焼結体。 - 添加物として、Mg、Ca、およびSrの少なくとも1種が添加される請求項2に記載の窒化珪素・メリライト複合焼結体。
- 添加物として、Srが添加される請求項2に記載の窒化珪素・メリライト複合焼結体。
- Siを、Si3N4換算で45〜83モル%、
Meを、酸化物換算で15〜49モル%、
添加物として、La、Ce、およびPrの少なくとも1種を、酸化物換算で0.3〜12モル%、
含有する請求項1に記載の窒化珪素・メリライト複合焼結体。 - 添加物として、Al、Si、周期表IVa族元素、周期表Va族元素、および周期表VIa族元素からなる群より選択される少なくとも1種の元素がさらに添加される請求項2ないし5のいずれかに記載の窒化珪素・メリライト複合焼結体。
- Alを、酸化物換算で0.5〜10モル%含有する請求項6に記載の窒化珪素・メリライト複合焼結体。
- Meが、周期表IIIa族元素である請求項1ないし7のいずれかに記載の窒化珪素・メリライト複合焼結体。
- Meが、Yである請求項8に記載の窒化珪素・メリライト複合焼結体。
- X線回折により得られる窒化珪素の主ピーク回折強度aおよびメリライトの主ピーク回折強度bが、次式
50≦[b/(a+b)]×100≦98
を満足する請求項1ないし9のいずれかに記載の窒化珪素・メリライト複合焼結体。 - ヤング率が200GPa以上である請求項1ないし10のいずれかに記載の窒化珪素・メリライト複合焼結体。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009216741A JP5481137B2 (ja) | 2008-11-21 | 2009-09-18 | 窒化珪素・メリライト複合焼結体 |
| US12/616,514 US8071496B2 (en) | 2008-11-21 | 2009-11-11 | Silicon nitride-melilite composite sintered body and device utilizing the same |
| KR1020090110224A KR101562401B1 (ko) | 2008-11-21 | 2009-11-16 | 질화규소·메릴라이트 복합 소결체 및 이것을 이용한 장치 |
| TW098139247A TWI436961B (zh) | 2008-11-21 | 2009-11-19 | 氮化矽.黃長石複合燒結體 |
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| US20110135144A1 (en) * | 2009-07-01 | 2011-06-09 | Hand Held Products, Inc. | Method and system for collecting voice and image data on a remote device and coverting the combined data |
| JP5481273B2 (ja) * | 2010-05-14 | 2014-04-23 | 日本特殊陶業株式会社 | 窒化珪素・メリライト複合焼結体を用いた基板および部材 |
| KR102069861B1 (ko) | 2013-06-26 | 2020-01-23 | 삼성전자주식회사 | 산화물, 이를 포함하는 전해질 및 전기화학장치 |
| JP6158926B2 (ja) * | 2014-01-31 | 2017-07-05 | 日本碍子株式会社 | 熱・音波変換部品及び熱・音波変換器 |
| KR102176900B1 (ko) | 2016-10-31 | 2020-11-10 | 교세라 가부시키가이샤 | 프로브 카드용 기판, 프로브 카드 및 검사장치 |
| CN110709367B (zh) * | 2017-06-29 | 2022-08-23 | 住友大阪水泥股份有限公司 | 复合烧结体、静电卡盘部件及静电卡盘装置 |
| JP7164658B2 (ja) * | 2020-09-03 | 2022-11-01 | Ntn株式会社 | 窒化ケイ素焼結体、それを用いた転動体、および軸受 |
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| JP3677360B2 (ja) | 1996-10-30 | 2005-07-27 | 京セラ株式会社 | 窒化珪素質焼結体の製造方法 |
| JPH11180774A (ja) * | 1997-12-22 | 1999-07-06 | Kyocera Corp | 窒化珪素質放熱部材及びその製造方法 |
| JP3764581B2 (ja) * | 1998-03-26 | 2006-04-12 | 京セラ株式会社 | 低熱伝導セラミックス焼結体 |
| JP2002257853A (ja) * | 2001-02-27 | 2002-09-11 | Ibiden Co Ltd | プローブカード |
| JP2002128567A (ja) * | 2001-09-14 | 2002-05-09 | Ngk Spark Plug Co Ltd | 窒化珪素質焼結体及びその製造方法 |
| WO2005019133A1 (ja) * | 2003-08-26 | 2005-03-03 | Kyocera Corporation | 窒化珪素質焼結体およびその製造方法、並びにそれを用いた耐溶融金属用部材、耐摩耗用部材 |
| WO2006057232A1 (ja) * | 2004-11-26 | 2006-06-01 | Kyocera Corporation | 窒化珪素質焼結体およびその製造方法、並びに金属溶湯用部材、熱間加工用部材、掘削用部材 |
| JP4648030B2 (ja) * | 2005-02-15 | 2011-03-09 | 日本碍子株式会社 | イットリア焼結体、セラミックス部材、及び、イットリア焼結体の製造方法 |
| JP4716855B2 (ja) * | 2005-11-08 | 2011-07-06 | 日本特殊陶業株式会社 | サイアロン製切削工具及びこれを備えた工具 |
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| US8071496B2 (en) | 2011-12-06 |
| KR20100057497A (ko) | 2010-05-31 |
| US20100130345A1 (en) | 2010-05-27 |
| TWI436961B (zh) | 2014-05-11 |
| TW201033156A (en) | 2010-09-16 |
| KR101562401B1 (ko) | 2015-10-21 |
| JP2010150123A (ja) | 2010-07-08 |
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