Room-temperature-densified H_(3)BO_(3) microwave dielectric ceramics with ultra-low permittivity and ultra-high Qf value

作     者：Wen Bin Hong Lei Li Han Yan Shu Ya Wu Hang Sheng Yang Xiang Ming Chen 

作者机构：Laboratory of Dielectric MaterialsSchool of Materials Science and EngineeringZhejiang UniversityHangzhou310027China 

出 版 物：《Journal of Materiomics》 (无机材料学学报（英文）)

年 卷 期：2020年第6卷第2期

页      面：233-239页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by National Key Research and Development Program of China under Grant No.2017YFB0406301 Natural Science Foundation of Zhejiang Province under Grant No.LY17E020004 

主　　题：Boric acid Microwave dielectric ceramics Room-temperature cold sintering Ultra-low permittivity 

摘      要：With the rapid development of mobile communication technology towards 5G and 6G,the microwave dielectric materials with ultra-low permittivity and ultra-high Qf value are urgently ***,the excellent microwave dielectric properties are reported in H3BO3 ceramics with the molecular crystal structure,whose permittivity(2.84)and density(1.46 g/cm^(3))are record-low among the low-loss *** ultra-high Qf value of 146,000 GHz(or the ultra-low dielectric loss of 1.03×10^(-4) at 15 GHz)is also ***,the H_(3)BO_(3) ceramics can be densified at room temperature by a simple cold sintering process in a short time of 10 min,and this brings many advantages for the integration with microwave *** large molecule volume originating from the molecular crystal structure and the low dielectric polarizabilities of H^(+) and B^(3+) are responsible for the ultra-low permittivity of H_(3)BO_(3) ceramics,and more microwave dielectric materials with ultra-low permittivity and ultra-high Qf value are expected to be explored in the molecular crystals.