Parkhurst, Wendel & Rossi
Formation of ceramic thin film on ceramic body
 A process for forming a ceramic thin film on a surface of a ceramic body, including the steps of preparing an annular body from a ceramic green sheet, inserting the ceramic body into the annular body, and firing the thus assembled annular body and ceramic body, whereby the annular body is shrunk and joined to the ceramic body. 
NGK Insulators, Ltd.
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Hirotake Ritsu
Yamada Tanaka