PRODUCTION OF GLASS POWDER AND SLURRY FOR GLASS-CERAMICS SUBSTRATE AND PRODUCTION OF GLASS-CERAMICS SUBSTRATE

摘要

PURPOSE:To improve diffusivity by surface treating a glass powder with =1 kind between a coupling agent and a water-soluble or water-insoluble dispersant to improve its diffusivity in a slurry, wet-crushing the product and drying the obtained glass powder. CONSTITUTION:A glass block is added with water and wet-crushed in a ball mill, etc. At least one kind among a titanium-based coupling agent, a silane- based coupling agent, a water-soluble dispersant such as ammonium polycarboxylate and a water-insoluble dispersant based on sorbitan, etc., is added by 0.13 pts.wt. based on the solid matter to 100 pts.wt. of a glass powder and mixed, and the mixture is dried. Subsequently, 5-25 pts.wt. of a binder such as polyvinyl butyral, 1-10 pts.wt. of a plasticizer such as dibutyl phthalate and 50-150 pts.wt. of a solvent such as toluene are added to 100 pts.wt. of the obtained glass powder to obtain a glass powder-contg. slurry. The slurry is applied on a carrier film, dried and released to obtain a green sheet, and the sheet is fired at =1000 deg.C to obtain a glass-ceramic substrate.