【摘要】 引入SnO₂对Li₂O-Nb₂O₅-TiO₂体系陶瓷进行掺杂改性研究,考察了SnO₂的添加量对LiNb_0.5Ti_0.5-xSn_xO₃陶瓷的烧结性能、显微结构和微波介电性能的影响。研究表明:对所考察的体系而言,随着SnO₂添加量的增加,烧结样品体积密度和介电常数基本保持不变;而品质因数Qf值随SnO₂的加入有所提高,而后随SnO₂含量继续增加而快速下降;在1100℃的烧结温度下,当x=0.01时,获得微波介电性能优良的微波陶瓷,其ε_?=67.8,τ_?=+4ppm/℃,Qf=6780GHz。更多还原

【Abstract】 SnO₂ was introduced into the LiNb_0.6Ti_0.5O₃ microwave dielectric ceramics as dopant.The effect of the amount of SnO₂ on sintering performances,microstructure and microwave dielectric properties in the LiNb_0.6Ti_0.5-xSn_xO₃ ceramics was investigated.The results indicate that for the specimens investigated, the bulk densities and dielectric constant remains steady when doping SnO₂.The value of quality factor （Qf）increases with the initial doping of SnO₂ but decrease quickly after more additives are introduced.The specimens with nice dielectric propertiesε_r=67.8,τ_f=+4ppm/℃,Qf=6780GHz were obtained at a sintering temperature of 1100℃for x=0.01.更多还原