以溶胶-凝胶法制备的堇青石粉体为原料,聚丙烯酸钠为分散剂、聚乙烯醇为粘结剂,聚乙二醇为增塑剂,通过水基流延成型制备了堇青石陶瓷生坯。研究了流延生坯的烧结性能及微观形貌。结果表明,1000℃下烧结体析出晶相全部为α-堇青石,致密性较好。叠层生坯在1000℃下烧结后层间界面消失,致密性好。叠片在1GHz下的介电常数ε=4.56,介电损耗tanδ=0.0032,基本满足低介片式电感元器件对介质材料的要求。
Cordierite powders prepared by sol-gel method were used as raw materials.Sodium polyacrylate,poly-ving akohol and polyethylene glycol were acted as dispersant,adhesive and plasticizer,respectively.The cordi-erite green tapes were obtained by aqueous tape-casting process.Sintering properties and microstructure were investigated.It turned out that cordierite sheets sintered at 1000℃ was composed ofα-cordierite crystal phase and has higher density.The density of laminated sheet sintered at 1000℃ was also on the high side,the inter-face between layers diminished.And the dielectric constantεand dielectric losses tanδof cordierite laminated sheet sintered at 1000℃ were 4.56 and 0.0032 at 1GHz,respectively.Dielectric performance can meet the re-quirements of chip inductance components.
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