【作者】 曹全喜； 周晓华； 徐毓龙； 牛苏彦；

【Author】 Cao Quanxi Zhou Xiaohua Xu Yulong Niu Suyan (Department of Technical Physics,Xidian University,Xi’an,710071,China)

【机构】 西安电子科技大学技术物理系；

【摘要】 本文通过对不同厂家生产的ZnO、Co₃O₄、CaCO₃、MnO₂以及用不同方法制备的SrTiO₃粉体的显微观察和比表面积等物理参数的测试,研究了不同物理参数的材料对功能材料性能的影响,指出了材料的粒度影响烧结过程和不同的组份的均匀性。较细的粒度、近似球形的粒形、较窄的粒度分布以及各种组份间粒度的合理配合,利于降低功能陶瓷的气孔率,提高密度和微观均匀性,提高压敏电阻器的通流能力,降低损耗。材料的物理参数还影响陶瓷的最终生成物的种类和比例。更多还原

【Abstract】 The physical parameters of ZnO,Co₃O₄,CaCO₃,MnO₂ and SrTiO₃ that are made by different factories and different method and their effects on the microstructure and electrical properties of function ceramic have been studied.It is pointed out that grain size relates to sinter process and uniformity among materials. When grain shape looks like ball,size is fine and distribution is more concentric,and size matching is reasonable among all materials,it would result in the reduction of air hole,the increment of density and microstructure uniformity for function ceramic,and the reduction of loss,the increment of the surge current absorption capability for varistor.It reveals also that physical parameter of material would effect the ultimate state of chemical compound.更多还原