晶化焼結法によるディオプサイドセラミックスの作製とその誘電特性 : 合成・キャラクタリーゼーション

概要

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Diopside ceramics were fabricated by firing glass compacts with the composition of MgO-CaO-2SiO_2 at various temperatures for 1 hour and the applicability of these ceramics to low loss dielectrics was investigated. A sharp shrinkage of diopside glass compacts was observed in a few minutes at 800℃ by the viscous flow mechanism and then the transformation into diopside ceramics by precipitation of diopside crystals proceeded at 858℃. Diopside ceramics were obtained by firing in the temperature range from 900° to 1200℃. The bending strength of sintered bodies obtained at 900℃ was about 200 MPa and decreased with increasing firing temperature. The linear thermal expansion coefficient of diopside ceramics was 10×10^<-6>℃^<-1>, and the dielectric constant and loss tangent were 7.1 and 2×10^<-4>, respectively.
社団法人日本セラミックス協会の論文
1990-08-01