文献类型：期刊文献

英文题名：Weakening the silicate network through six-coordinated magnesium to achieve a high degree of crystallization of β-CaSiO3 in calcium borosilicate glass ceramics for 5G application

作者：Jia, Qingchao[1];Yang, Rui[1];Zhang, Liangzhu[1];Chen, Chen[2];Yu, Jiayan[2];Luo, Xiongke[2];Zeng, Huidan[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]Shanghai Zenfocus Semicond Technol Co Ltd, Shanghai 201206, Peoples R China

年份：2024

卷号：50

期号：11

起止页码：20186

外文期刊名：CERAMICS INTERNATIONAL

收录：;EI(收录号：20241315805371);WOS:【SCI-EXPANDED(收录号:WOS:001292378000001)】；

基金：The authors are very grateful for the National Natural Science Foundation of China for Innovative Research Groups (nos. 52072122 and 52272001) and the technical support of Shanghai Zenfocus Semi-conductor Technology Co., Ltd. We appreciate Prof. Dr. Peter A. Thrower for Polishing the English language and providing meaningful suggestions for this work.

语种：英文

外文关键词：Glass-ceramics; beta-CaSiO3; MgO; Controlled crystallization

摘要：(3-CaSiO3 with a low dielectric constant and low dielectric loss is one of the decisive components of commercial calcium borosilicate (CBS) low-temperature co-fired ceramic substrate. However, achieving a high degree of crystallization of (3-CaSiO3 is difficult in CBS glass ceramics because of the competitive multiphase crystallization during sintering. We have shown that six-coordinated magnesium can be used to weaken the silicate network to achieve a high degree of crystallization of (3-CaSiO3 in CBS glass ceramics. The appropriate MgO content to ensure a large amount of MgO6 production gradually destroys the [SiO4] tetrahedral network as the temperature increases, resulting in a (3-CaSiO3 content of 76.2 vol%, when the MgO content is 2.71 mol%. The resulting material has the lowest dielectric constant (4.95@15 GHz) and dielectric loss (8 x 10-4@15 GHz), and the best three-point bend strength (77.43 MPa). Our work provides an effective method of changing the crystallization by modifying the glass network in silicate-based glass ceramics with a low dielectric constant.