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Method Of Fabricating High Light Transmission Zirconia Blanks For Milling Into Natural Appearance Dental Appliances
专利权人:
Robin A. Carden
发明人:
Robin A. Carden
申请号:
US13481810
公开号:
US20130313738A1
申请日:
2012.05.26
申请国别(地区):
US
年份:
2013
代理人:
摘要:
A process for fabricating pre-sintered zirconia blanks that are then computer machined and sintered to form dental appliances having highly advantageous features. The principal steps of a preferred embodiment of that process comprise a) preparing a ceramic slurry of binderless zirconia powder b) subjecting the slurry to attrition milling down to about a 5-29 nm crystallite size c) preparing a vacuum assisted and pressure assisted slip casting mold and pouring the milled slurry into the slip-casting mold d) after casting, excess slurry is poured from the mold and a consolidated zirconia blank is removed e) drying the blank and pre-sintering it to form solid blanks ready for CAD/CAM machining and sintering to net shape. The attrition is run with ball bearings that are of the sample material to prevent contamination. It also is run, up to 24 hours, to break down the crystallites to overcome the high density of zirconia.
来源网站:
中国工程科技知识中心
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http://www.ckcest.cn/home/

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