JP6573872B2 - セラミック素地及びその製造方法 - Google Patents
セラミック素地及びその製造方法 Download PDFInfo
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- JP6573872B2 JP6573872B2 JP2016508465A JP2016508465A JP6573872B2 JP 6573872 B2 JP6573872 B2 JP 6573872B2 JP 2016508465 A JP2016508465 A JP 2016508465A JP 2016508465 A JP2016508465 A JP 2016508465A JP 6573872 B2 JP6573872 B2 JP 6573872B2
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Description
原料粉末を準備した。原料粉末は、平均粒径1.5μmのAl2O3粉末、平均粒径0.5μmのMgO粉末、平均粒径1.0μmのSiO2粉末、平均粒径1.0μmのMnCO3粉末及び平均粒径1.0μmのBaCO3粉末、平均粒径3.0μmのMoO3粉末である。
原料粉末のうち、SiO2粉末を4.0質量%、MnCO3粉末を4.7質量%(MnO換算2.9質量%)、MgO粉末を0.0質量%(添加せず)、BaCO3粉末を1.2質量%(BaO換算0.9質量%)とし、焼成温度(最高温度)を1360℃とした点以外は、上述した実施例1と同様にして実施例2に係るセラミック素地を作製した。
焼成温度(最高温度)を1320℃とした点以外は、上述した実施例2と同様にして実施例3に係るセラミック素地を作製した。
原料粉末のうち、Al2O3粉末を90.5質量%、SiO2粉末を4.4質量%、MnCO3粉末を5.7質量%(MnO換算3.5質量%)、MgO粉末を0.0質量%(添加せず)、BaCO3粉末を1.3質量%(BaO換算1.0質量%)とし、焼成温度(最高温度)を1320℃とした点以外は、上述した実施例1と同様にして実施例4に係るセラミック素地を作製した。
原料粉末のうち、SiO2粉末を3.8質量%、MnCO3粉末を6.0質量%(MnO換算3.7質量%)、BaCO3粉末を0.0質量%(添加せず)とし、焼成温度(最高温度)を1360℃とした点以外は、上述した実施例1と同様にして比較例1に係るセラミック素地を作製した。
原料粉末のうち、Al2O3粉末を90.5質量%、SiO2粉末を5.0質量%、MnCO3粉末を1.9質量%(MnO換算1.2質量%)、MgO粉末を0.8質量%、MoO3粉末を0.0質量%(添加せず)、BaCO3粉末を1.0質量%(BaO換算0.8質量%)、TiO2粉末を1.7質量%とし、焼成温度(最高温度)を1300℃とした点以外は、上述した実施例1と同様にして比較例2に係るセラミック素地を作製した。
<結晶相の確認>
実施例1〜4並びに比較例1及び2の各第1セラミック素地を粉砕し、X線回折により同定した。
実施例1〜4並びに比較例1及び2の各第2セラミック素地を、JISR1601の4点曲げ強度試験に基づいて室温にて測定した。
JISC2565に基づく、空洞共振法により、室温での周波数2GHzで測定した。
図5Aに示すように、多数個取り基板60を作製する。多数個取り基板60は、横方向に23個の積層基板12をチップ分割でき、縦方向に23個の積層基板12をチップ分割できるサイズを有する。つまり、この多数個取り基板60は、図5Bに示すように、横Lxが2.0mm、縦Lyが1.6mm、厚みtが0.4mm(ベース部分16の厚みtb:0.2mm)の積層基板12を23×23=529個取ることができるサイズを有する。
Claims (6)
- 結晶相が、Al2O3を主結晶相とし、その他、BaAl2Si2O8結晶相のみを含み、
AlをAl 2 O 3 換算で89.0〜92.0質量%、SiをSiO 2 換算で2.0〜5.0質量%、MnをMnO換算で2.0〜5.0質量%、MgをMgO換算で0〜2.0質量%、BaをBaO換算で0.05〜2.0質量%含むことを特徴とするセラミック素地。 - 請求項1記載のセラミック素地において、
曲げ強度が600MPa以上であることを特徴とするセラミック素地。 - 請求項1又は2記載のセラミック素地において、
温度1200〜1400℃にて焼結されていることを特徴とするセラミック素地。 - 結晶相が、Al 2 O 3 を主結晶相とし、その他、BaAl 2 Si 2 O 8 結晶相のみを含むセラミック素地の製造方法であって、
Al2O3粉末を89.0〜92.0質量%、SiO2粉末を2.0〜5.0質量%、MnCO3粉末を3.2〜8.1質量%(MnO換算2.0〜5.0質量%)、MgO粉末を0〜2.0質量%、BaCO3粉末を0.06〜2.6質量%(BaO換算0.05〜2.0質量%)含有する成形体を作製する成形体作製工程と、
前記成形体を1200〜1400℃にて焼成する焼成工程とを有することを特徴とするセラミック素地の製造方法。 - 請求項4記載のセラミック素地の製造方法において、
前記成形体に、金属を含む導体層を形成する工程をさらに有し、
前記焼成工程は、前記導体層が形成された成形体を焼成することを特徴とするセラミック素地の製造方法。 - 請求項4又は5記載のセラミック素地の製造方法において、
前記焼成工程は、水素を5%以上含む、水素と窒素のフォーミングガス中で行うことを特徴とするセラミック素地の製造方法。
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