Ba2Ti9O20陶瓷流延浆料的流变性能和流延成型研究

Ba₂Ti₉O₂₀陶瓷流延浆料的流变性能和流延成型研究

摘要: 以BaCO₃和TiO₂粉末为原料,采用固相反应法合成Ba₂Ti₉O₂₀的粉体,并以此粉体为主要原料添加适量的分散剂、粘结剂及塑性剂,采用流延法制备Ba₂Ti₉O₂₀陶瓷膜片。研究了不同种类和配比的溶剂、不同种类和含量的分散剂对Ba₂Ti₉O₂₀流延浆料的流变特性的影响。结果表明,当选用异丙醇和甲苯(体积比为75:25)为溶剂,固含量Ba₂Ti₉O₂₀54wt%,分散剂蓖麻油0.5wt%,粘结剂聚乙烯醇缩丁醛5wt%,塑性剂聚乙二醇5wt%时,流延浆料的流变性能较好,浆料的粘度为9.1Pa.s。

Abstract: Ba₂Ti₉O₂₀ powder was synthesized by solid state reaction method using BaCO₃B and TiO₂ as raw materials.The Ba₂Ti₉O₂₀ powder mixed with appropriate dispersant,agglomerant and plasticizer was used to make the slurry for tape casting.The effect of the matching and type of solvents,the amount and type of dispersant on the properties of the rheological behavior were investigated.The results show that the rheological behaviors are well with slurry viscosity of 9.1Pa.s when plasticizer（polyethylene glycol） is 5wt%,agglomerant（Polyvinylbutyral） is 5wt%,dispersing agent（castor oil） is 0.5wt%,solid ceramic powders is 54wt% and combined solvents（volume ratio is 75:25） is isopropyl alcohol-toluene.