不同TiO_(2)和Nb_(2)O_(5)含量对BaO-SrO-PbO-TiO_(2)-Nb_(2)O_(5)-SiO_(2)玻璃陶瓷介电性能的影响  

TiO_(2)and Nb_(2)O_(5)Content on Dielectric Properties of BaO-SrO-PbOTiO_(2)-Nb_(2)O_(5)-SiO_(2)Glass-Ceramics

作　　者：陈均优 张庆猛 周敏 赵艳芸 Chen Junyou;Zhang Qingmeng;Zhou Min;Zhao Yanyun(Advanced Electronic Materials Institute,GRIMAT Engineering Institute Co.,Ltd.,Beijing 101407,China)

机构地区：[1]有研工程技术研究院有限公司先进电子材料事业部,北京100088

出　　处：《稀有金属》2024年第10期1502-1509,共8页Chinese Journal of Rare Metals

基　　金：国家自然科技基金面上项目(62174015)资助。

摘　　要：使用熔融-快冷-可控结晶技术,制备出了不同TiO_(2)和Nb_(2)O_(5)含量的Ba O-Sr O-Pb O-TiO_(2)-SiO_(2)-Nb_(2)O_(5)纳米复合介电材料,并对其介电性能进行了研究。结果表明:800℃结晶处理后的样品析出了烧绿石结构Pb_(2)Nb_(2)O_(7)相、钨青铜结构(Ba,Sr,Pb)Nb_(2)O_(6)相和钙钛矿结构(Sr,Pb)TiO_(3)相,其中Pb_(2)Nb_(2)O_(7)相衍射峰强度随TiO_(2)/Nb_(2)O_(5)比例的上升而增强;900和1000℃结晶处理后,TiO_(2)含量较多的样品中依然存在Pb_(2)Nb_(2)O_(7)相,且衍射峰强度随结晶处理温度的上升而下降。微观结构分析结果显示在1000℃结晶处理后,所有样品的晶体颗粒近似球形。通过对Ba O-Sr O-Pb O-TiO_(2)-SiO_(2)-Nb_(2)O_(5)体系中TiO_(2)与Nb_(2)O_(5)含量的调整,获得了介电性能突出的玻璃陶瓷样品,TiO_(2)含量为12%,Nb_(2)O_(5)含量为24%的玻璃陶瓷样品获得了最大介电常数(~1310),同时介电损耗维持在0.0093的较低水平,作为高压陶瓷电容器介质展现出了良好的应用前景。The glass-ceramic dielectric material is a composite material of glass and ceramic phase coexist.The glass-ceramic can achieve complete densification and possess high breakdown field strength.It can precipitate high dielectric constant ceramic phase through controlled crystallization process,so that the glass-ceramic has moderate dielectric constant.Therefore,as a new type of dielectric energy storage material,dielectric glass-ceramic has a good prospect in the application field of high-voltage capacitors.However,the low dielectric constant and high dielectric loss of glass-ceramic hinder the further development of this material.In this paper,titanate ceramic phase was introduced into niobate glass-ceramic system to increase the dielectric constant and alkali metal ions with small radius were removed to reduce the dielectric loss.Ba O-Sr O-Pb O-TiO_(2)-SiO_(2)-Nb_(2)O_(5)nanocomposite dielectric materials with different TiO_(2)and Nb_(2)O_(5)contents were prepared via melting-quenching-controlled crystallization technology.And the effect of TiO_(2)and Nb_(2)O_(5)contents on properties of Ba O-Sr O-Pb O-TiO_(2)-SiO_(2)-Nb_(2)O_(5)glass-ceramic system were characterized by X-ray diffraction(XRD),differential thermal analysis(DTA),scanning electron microscopy(SEM)and dielectric properties test.The results showed that the crystallization activation energy decreased gradually with the value of TiO_(2)/Nb_(2)O_(5)increased,which meant that the increased of TiO_(2)/Nb_(2)O_(5)ratio in Ba O-Sr O-Pb O-TiO_(2)-SiO_(2)-Nb_(2)O_(5)glass-ceramic system was conducive to crystallize.XRD results showed the glass samples all had obvious amorphous characteristics,indicating there was no crystal phase precipitation in the glass matrix.The samples after crystallization treatment at800℃precipitated pyrochlore structure Pb_(2)Nb_(2)O_(7)phase,tungsten bronze structure(Ba,Sr,Pb)Nb2O6 phase and perovskite structure(Sr,Pb)TiO_(3)phase,and the intensity of the diffraction peak of Pb_(2)Nb_(2)O_(7)phase increased as the value of TiO_(2)/

关 键 词：玻璃陶瓷 介电性能 高介电常数 低介电损耗 

分 类 号：TN304.82[电子电信—物理电子学]