Process for production of scandia-stabilized zirconia sheet, scandia-stabilized zirconia sheet obtained by the process, and scandia-stabilized zirconia sintered powder
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United States of America Patent
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Mar 21, 2017
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Sep 13, 2012
app pub date -
Oct 22, 2010
filing date -
Oct 23, 2009
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Abstract
The present invention relates to a method of producing a scandia-stabilized zirconia sheet. The method includes the steps of: (1) pulverizing a scandia-stabilized zirconia sintered body to obtain a sintered scandia-stabilized zirconia powder having an average particle diameter (De), determined by a transmission electron microscope, in the range of 0.3-1.5 μm, and an average particle diameter (Dr), determined by a laser scattering method, in the range of 0.3-3.0 μm, where a ratio of Dr/De is at least 1.0-2.5; (2) preparing a slurry containing the sintered scandia-stabilized zirconia powder and an unsintered zirconia powder, where a percentage of the sintered scandia-stabilized zirconia powder to a sum of the sintered scandia-stabilized zirconia powder and the unsintered zirconia powder in the slurry is at least 2 mass % and at most 40 mass %; (3) molding the slurry into a green sheet; and (4) sintering the green sheet.
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