Low temperature fired CaF2-based microwave dielectric ceramics with enhanced microwave properties

Chen，Xianqiang1,2; Zhao，Binfeng1,2; Chen，Naichao1,2; Cheng，Jin1,2; Dang，Mingzhao3; Wang，Feng1,2; Xu，Xinwei1,2; Wang，Hong1,2

2022

10.1016/j.jeurceramsoc.2022.05.027

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY   影响因子和分区

0955-2219

1873-619X

Low-temperature-fired microwave ceramics are key to realizing the integration and miniaturization of microwave devices. In this study, a facile wet chemical method was applied to synthesize homogenous nano-sized CaF powders for simultaneously achieving low-temperature sintering and superior microwave dielectric properties. Pure CaF ceramics sintered at 950 °C for 6 h with good microwave dielectric properties (ε = 6.22, Q×f = 36,655 GHz, and τ = −102 ppm/°C) was achieved. The microwave dielectric properties of the CaF ceramics were further improved by introducing LiF as a sintering aid. The sintering temperature of CaF-based ceramics was effectively lowered from 950 °C to 750 °C with 10 wt% LiF doping, and excellent microwave dielectric properties (ε = 6.37, Q×f = 65,455 GHz, and τ = −71 ppm/°C) were obtained.

CaF2 ceramics CaF2-LiF composites LTCC Microwave dielectric properties

EI ; SCI

英语

第一 ; 通讯

Key Area Research Plan of Guangdong[2020B010176001] ; Shenzhen Science and Technology Program["KQTD20180411143514543","JCYJ20180504165831308"] ; State key laboratory of new electronic components and materials of Guangdong Fenghua Advanced Technology Holding CO., LTD.[FHR-JS-202011010]

Materials Science

Materials Science, Ceramics

WOS:000865403700003

ELSEVIER SCI LTD

20222112142171

Calcium fluoride ; Dielectric properties ; Fluorspar ; Lithium compounds ; Microelectronics ; Microwave devices ; Microwaves ; Sintering

Minerals:482.2 ; Thermodynamics:641.1 ; Electromagnetic Waves:711 ; Inorganic Compounds:804.2 ; Physical Properties of Gases, Liquids and Solids:931.2

MATERIALS SCIENCE

2-s2.0-85130327044

Scopus

1.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
2.Shenzhen Engineering Research Center for Novel Electronic Information Materials and Devices & Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
3.Guangdong Fenghua Advanced Technology Holding Co.,Ltd,Zhaoqing,Guangdong,526000,China

Chen，Xianqiang,Zhao，Binfeng,Chen，Naichao,et al. Low temperature fired CaF2-based microwave dielectric ceramics with enhanced microwave properties[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2022,42(12):4969-4973.

Chen，Xianqiang.,Zhao，Binfeng.,Chen，Naichao.,Cheng，Jin.,Dang，Mingzhao.,...&Wang，Hong.(2022).Low temperature fired CaF2-based microwave dielectric ceramics with enhanced microwave properties.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,42(12),4969-4973.

Chen，Xianqiang,et al."Low temperature fired CaF2-based microwave dielectric ceramics with enhanced microwave properties".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 42.12(2022):4969-4973.