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METHOD FOR PRODUCING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
PROBLEM TO BE SOLVED: To provide an alumina sintered body having high volume resistivity or high withstand voltage at a high temperature.SOLUTION: There is provided a method for producing an alumina sintered body which comprises: (a) a step of obtaining a molded body by charging a slurry containing AlOpowder, MgO powder, MgFpowder, a solvent, a dispersant and a gelling agent into a molding die, reacting the gelling agent to gelate the slurry in the molding die and releasing the slurry from the die; (b) a step of obtaining a calcined body by drying the molded body, followed by degreasing and calcining; and (c) a step of obtaining a ceramic sintered body by hot-press firing the calcined body at 1150 to 1350°C. There is provided a method for producing an alumina sintered body in which in preparing the slurry in the step (a), an AlOpowder having a purity of 99.9 mass% or more is used as 0.1 to 0.2 pt.mass of MgO powder and 0.13 pt.mass or less of MgFpowder are used based on 100 pts.mass of the AlOpowder.SELECTED DRAWING: None
【課題】高温での体積抵抗率や耐電圧の高いアルミナ焼結体の提供。【解決手段】（ａ）Ａｌ2Ｏ3粉末、ＭｇＯ粉末、ＭｇＦ2粉末、溶媒、分散剤及びゲル化剤を含むスラリーを成形型に投入し、前記成形型内で前記ゲル化剤を化学反応させて前記スラリーをゲル化させたあと離型することにより、成形体を得る工程と、（ｂ）該成形体を乾燥したあと脱脂し更に仮焼することにより、仮焼体を得る工程と、（ｃ）前記仮焼体を１１５０〜１３５０℃でホットプレス焼成することにより、セラミック焼結体を得る工程と、を含むアルミナ焼結体の製法。前記工程（ａ）では、前記スラリーを調製するにあたり、Ａｌ2Ｏ3粉末として純度が９９．９質量％以上のものを使用し、Ａｌ2Ｏ3粉末１００質量部に対してＭｇＯ粉末を０．１〜０．２質量部、ＭｇＦ2粉末を０．１３質量部以下使用するアルミナ焼結体の製法。【選択図】なし
METHOD FOR PRODUCING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
PROBLEM TO BE SOLVED: To provide an alumina sintered body having high volume resistivity or high withstand voltage at a high temperature.SOLUTION: There is provided a method for producing an alumina sintered body which comprises: (a) a step of obtaining a molded body by charging a slurry containing AlOpowder, MgO powder, MgFpowder, a solvent, a dispersant and a gelling agent into a molding die, reacting the gelling agent to gelate the slurry in the molding die and releasing the slurry from the die; (b) a step of obtaining a calcined body by drying the molded body, followed by degreasing and calcining; and (c) a step of obtaining a ceramic sintered body by hot-press firing the calcined body at 1150 to 1350°C. There is provided a method for producing an alumina sintered body in which in preparing the slurry in the step (a), an AlOpowder having a purity of 99.9 mass% or more is used as 0.1 to 0.2 pt.mass of MgO powder and 0.13 pt.mass or less of MgFpowder are used based on 100 pts.mass of the AlOpowder.SELECTED DRAWING: None
【課題】高温での体積抵抗率や耐電圧の高いアルミナ焼結体の提供。【解決手段】（ａ）Ａｌ2Ｏ3粉末、ＭｇＯ粉末、ＭｇＦ2粉末、溶媒、分散剤及びゲル化剤を含むスラリーを成形型に投入し、前記成形型内で前記ゲル化剤を化学反応させて前記スラリーをゲル化させたあと離型することにより、成形体を得る工程と、（ｂ）該成形体を乾燥したあと脱脂し更に仮焼することにより、仮焼体を得る工程と、（ｃ）前記仮焼体を１１５０〜１３５０℃でホットプレス焼成することにより、セラミック焼結体を得る工程と、を含むアルミナ焼結体の製法。前記工程（ａ）では、前記スラリーを調製するにあたり、Ａｌ2Ｏ3粉末として純度が９９．９質量％以上のものを使用し、Ａｌ2Ｏ3粉末１００質量部に対してＭｇＯ粉末を０．１〜０．２質量部、ＭｇＦ2粉末を０．１３質量部以下使用するアルミナ焼結体の製法。【選択図】なし
METHOD FOR PRODUCING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
アルミナ焼結体の製法及びアルミナ焼結体
NOBORI KAZUHIRO (author) / KIMURA TAKUJI (author)
2016-10-20
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
METHOD FOR PRODUCING ALUMINA SINTERED BODY AND ALUMINA SINTERED BODY
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