【摘要】 以松油醇为溶剂、乙基纤维素为粘结剂、三乙醇胺为分散剂、蓖麻油为触变剂,制备了低粘度、高固含量的氧化铝绝缘浆料。分别研究了分散剂、触变剂的添加量对浆料流变性的影响,研究表明:分散剂三乙醇胺在有机溶剂中添加量为5wt%,触变剂蓖麻油在有机溶剂中添加量为3wt.%时,浆料具有良好的流变性。将制备的绝缘浆料丝网印刷在基材上,经1100℃烧结形成的导热绝缘层厚度均匀约为8μm,电阻率为8.0×106Ω.cm。更多还原

【Abstract】 Alumina insulation slurry with low viscosity and high solid content was prepared using terpinol as dissolvent,ethyl cellulose as binder,triethanolamine as dispersant and castor oil as thixotropic agent.The influence on slurry rheology by the content of dispersant and thixotropic agent waw studied respectively.Experimental investigation indicated that the slurry had good rheology when the organic solvent was doped with 5wt% triethanolamine as dispersant and 3wt% castor oil as thixotropic agent.The prepared alumina insulation slurry was screen printed on a substrate,then sintered at 1100℃ and a thermal insulating layer was formed with the thickness of 8μm and the resistivity of 8.0×106Ω·cm.更多还原