| 摘要 |
PURPOSE:To obtain the title composition improved in the bond strength between metallizing metal and the ceramic therefrom by incorporating a ceramic composition predominant in mullite with each specified amount of yttria as sintering auxiliary and borosilicate glass. CONSTITUTION:For example, a synthetic mullite raw material is incorporated with (A) 2-4wt.%, on an outer basis, of yttria and (B) 2.0-10wt.%, on an outer basis, of borosilicate glass. The resulting raw material is then incorporated with an organic binder, plasticizer and solvent followed by grinding and mixing in a ball mill into a slurry, from which a tape-shaped ceramic green sheet is formed through doctor blade technique. This sheet is subjected to raw processing and cut into chips, which are then coated with a metallic paste such as of W or Mo and fired in a wet hydrogen-nitrogen mixed gas. Thereby, borosilicate glass will be intruded as liquid component into mullite's inner pores, leading to increase in the bond strength between the metallizing metal and the resultant ceramic. |
