The dimensional effect of MgTiO3 ceramic filler on the microwave dielectric properties of PTFE/MgTiO3 composite with ultra-low dielectric loss

被引：33

作者：

Peng, Haiyi ^{[1
,2
]}

Ren, Haishen ^{[1
,2
]}

Dang, Mingzhao ^{[1
,2
]}

Zhang, Yi ^{[1
]}

Gu, Zhongyuan ^{[1
]}

Yao, Xiaogang ^{[1
]}

Lin, Huixing ^{[1
]}

机构：

[1] Chinese Acad Sci, Informat Mat & Devices Res Ctr, Shanghai Inst Ceram, 1295 Dingxi Rd, Shanghai 200050, Peoples R China

[2] Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2019年 / 30卷 / 07期

关键词：

COUPLING AGENT; CONSTANT; PTFE; MICROSTRUCTURE; MECHANISM;

D O I：

10.1007/s10854-019-00977-y

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

PTFE matrix loaded with different volume fractions of MgTiO3 ceramic powder with particle sizes of around 5m and 15m (abbreviated as MT-5 and MT-15, respectively) was prepared. The microstructure, microwave dielectric properties and thermal properties of the composites were studied by scanning electron microscope, vector network analyzer and thermal dilatometer. The results show that PTFE/MT-15 composite exhibits higher relative density and better dielectric properties than the PTFE/MT-5 composite, since the former with coarse particles possesses lower surface energy to weaken the particle agglomeration effect. Even at 40% filler volume fraction, the ultra-low dielectric loss of PTFE/MT-15 composite can be maintained in the order of 10(-4)at 10GHz. Different models are used to predict the dielectric constant of the composites. Among which, the effective medium theory shows the least deviation from the experimental results. PTFE matrix filled with 40V% MT-15 ceramic powder shows excellent microwave dielectric properties: epsilon(r)=5.5, tan=2.7x10(-4) (at 10GHz), which may be a promising material in electronic packaging field.

引用

页码：6680 / 6687

页数：8

共 21 条

[1] Dielectric properties of spherical dielectric oxide powder and its ceramic-polymer composite [J].