Low-firing and temperature stability regulation of tri-rutile MgTa_(2)O_(6)microwave dielectric ceramics  

作　　者：Chengzhi Xu Hongyu Yang Hongcheng Yang Linzhuang Xing Yuan Wang Zhimin Li Enzhu Li Guorui Zhao 

机构地区：[1]School of Advanced Materials and Nanotechnology,Xidian University,Xi’an 710071,China [2]Academy of Advanced Interdisciplinary Research,Xidian University,Xi’an 710071,China [3]School of New Energy and Materials,Southwest Petroleum University,Chengdu 610500,China [4]National Engineering Research Center of Electromagnetic Radiation Control Materials and Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of Education,University of Electronic Science and Technology of China,Chengdu 610054,China [5]Songshan Lake Materials Laboratory A1 Building,University Innovation Park,Dongguan 523808,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2024年第8期1935-1943,共9页矿物冶金与材料学报（英文版）

基　　金：This study is supported by the National Key Research and Development Program of China(No.2022YFB2807405);the Qinchuangyuan Citing High-level Innovation and Entrepreneurship Talent Projects(No.QCYRCXM-2022-40);the National Natural Science Foundation of China(Nos.U2341263 and 62371366);Open project of Yunnan Precious Metals Laboratory Co.,Ltd(No.YPML-2023050246);Innovation Capability Support Program of Shaanxi,China(Nos.2023-CX-PT-30 and 2022TD-28).

摘　　要：A glass frit containing Li_(2)O-MgO-ZnO-B_(2)O_(3)-SiO_(2)component was used to explore the low-temperature sintering behaviors and microwave dielectric characteristics of tri-rutile MgTa_(2)O_(6)ceramics in this study.The good low-firing effects are presented due to the high matching relevance between Li_(2)O-MgO-ZnO-B_(2)O_(3)-SiO_(2)glass and MgTa_(2)O_(6)ceramics.The pure tri-rutile MgTa_(2)O_(6)structure remains unchanged,and high sintering compactness can also be achieved at 1150℃.We found that the Li_(2)O-MgO-ZnO-B_(2)O_(3)-SiO_(2)glass not only greatly improves the low-temperature sintering characteristics of MgTa_(2)O_(6)ceramics but also maintains a high(quality factor(Q)×resonance frequency(f))value while still improving the temperature stability.Typically,great microwave dielectric characteristics when added with 2wt%Li_(2)O-MgO-ZnO-B_(2)O_(3)-SiO_(2)glass can be achieved at 1150℃:dielectric constant,ε_(r)=26.1;Q×f=34267 GHz;temperature coefficient of resonance frequency,τ_(f)=-8.7×10^(-6)/℃.

关 键 词：MgTa_(2)O_(6) CERAMIC microwave dielectric characteristics glass 

分 类 号：TQ174.1[化学工程—陶瓷工业]