低损耗高耐压Al_(2)O_(3)基低温共烧陶瓷  

Low Dielectric Loss and High Dielectric Breakdown Strength in Al_(2)O_(3)-Based Low-Temperature Co-Fired Ceramic Materials

作　　者：王飞[1,2,3] 宋小强 尹长志 雷文 吕文中[1,2,3] WANG Fei;SONG Xiaogiang;YIN Changzhi;LEI Wen;LYU Wenzhonog(Key lab of Functional Materials for Electronic Information(B)of MOE,Huazhong University of Science and Technology,Wuhan 430074,China;School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,China;Wenzhou Advanced Manufacturing Institute of Huazhong University of Science and Technology,Wenzhou 325035,Zhejiang,China)

机构地区：[1]华中科技大学,电子信息功能材料教育部重点实验室(B类),武汉430074 [2]华中科技大学光学与电子信息学院,武汉430074 [3]华中科技大学温州先进制造技术研究院,浙江温州325035

出　　处：《硅酸盐学报》2023年第4期882-888,共7页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金资助项目(No.51772107、No.U21B2068、No.52072133)。

摘　　要：为获得低介电损耗、高耐压强度的Al_(2)O_(3)基低温共烧陶瓷(LTCC)材料,采用固相法制备了x(6La2O3·24CaO·50B2O3·20SiO2)(LCBS)+(1–x)Al_(2)O_(3)玻璃/陶瓷.通过X射线衍射仪、扫描电子显微镜、矢量网络分析仪、高压击穿试验仪、高温介电温谱仪对烧结样品的结构和性能进行了表征.结果表明:添加适量的LCBS玻璃粉有助于提升材料的致密性、降低介电损耗、提高击穿场强.同时,复阻抗谱分析表明,LCBS玻璃的加入可以显著提高玻璃/陶瓷的电阻率和活化能.当玻璃含量(摩尔分数)为44%时,850℃烧结0.5 h,可获得性能优异的LTCC陶瓷材料G44:εr=7.14,Q×f=5769 GHz(f=13 GHz),Eb=57.44 kV/mm.To obtain AlO3-based low-temperature co-fired ceramic(LTCC)materials with low dielectric loss and high breakdown strength,glass/ceramics of x(La_(2)O_(3)-CaO-B_(2)O_(3)-SiO2)(LCBS)+(1-x)Al_(2)O_(3)were synthesized by a solid-state method.The structure and properties of the sintered samples were characterized by X-ray difractometer,scanning electron microscope,vector network analyzer,high voltage breakdown instrument,and high-temperature dielectric spectrometer.The results show that adding an appropriate amount of LCBS glass powder can increase the density,reduce the dielectric loss and improve the breakdown strength of the composites.Moreover,based on the complex impedance spectrum analysis,the addition of LCBS can significantly increase the resistivity and activation energy of glass/ceramics.When Al_(2)O_(3)ceramic with 44%(mole fraction)LCBS glass(abbreviated G44)is sintered at 850 C for 0.5 h,a LTCC ceramic material with the superior properties(i.e.,&=7.14,Qxf=5769 GHz at f=13 GHz,and Eb=57.44 kV/mm)can be obtained.

关 键 词：玻璃/陶瓷 低温烧结 介电性能 击穿场强 

分 类 号：TQ174.75[化学工程—陶瓷工业]