摘要
主要采用固相反应法,将原料粉体经过混料、球磨、预烧、成型和烧结后制备Ba_3La_2Ti_2Nb_2O_(15)(BLTN)微波介质陶瓷。研究了不同量的Bi_2O_3掺杂对BLTN微波介质陶瓷烧结行为、显微结构和介电性能的影响。结果表明:Bi_2O_3的添加不仅能有效降低BLTN陶瓷的烧结温度,而且显著提高了其相对介电常数(ε_r)和品质因数。当Bi_2O_3添加量为0.2%(质量分数)时,陶瓷的烧结温度由1440℃降低到1360℃,并呈现较好的微波介电性能:ε_r=55,Q·f=13 500 GHz(4.71 GHz),τ_f=–2.35×10^(-6)℃^(-1)。
Ba3La2Ti2Nb2O15（BLTN）microwave dielectric ceramics were prepared by solid state reaction method through the processes of the mixing, ball milling, pre-sintering, molding and sintering. The effects of Bi2O3 doping amount on sintering behavior, microstructures and microwave dielectric properties of the BLTN ceramics were investigated. The results reveal that the incorporation of Bi2O3 can effectively reduce the sintering temperature, relative permittivity and quality factor of the BLTN ceramics are remarkably improved. When the Bi2O3 doping amount of Bi2O3 is 0.2% （mass fraction）, the sintering temperature of BLTN ceramics is reduced from 1440 ℃ to 1360 ℃, and the optimal microwave dielectric properties are obtained： εr=55, Q·f=13 500 GHz（4.71 GHz）, τf = –2.35×10^–6℃^–1.
出处
《电子元件与材料》
CAS
CSCD
2017年第11期12-15,共4页
Electronic Components And Materials
基金
深圳市科技研发计划项目资助(No.JCYJ20150827165038323
No.JCYJ20160301154309393)
国家重点研发计划项目资助(No.2017YFB0406300)
