文献类型：期刊文献

英文题名：Crystallization of low-k boron calcium silicate glass-ceramics induced by β-CaSiO3 seed crystals

作者：Yang, Maoyuan[1]; Jia, Qingchao[1]; Chen, Chen[2]; Yu, Jiayan[2]; Yu, Hang[2]; Zeng, Huidan[1]; Luo, Xiongke[2]

机构：[1] School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Shanghai Zenfocus Semiconductor Technology Co., Ltd., Shanghai, 201206, China

年份：2025

卷号：51

期号：11

起止页码：14736

外文期刊名：Ceramics International

收录：EI(收录号：20250617812425)

语种：英文

外文关键词：Borosilicate glass - Crystal growth from melt - Crystalline materials - Dielectric losses - Dielectric properties of solids - Low-k dielectric - Silicates - Sintering

摘要：Calcium borosilicate (CBS) low temperature co-fired glass-ceramic substrates exhibit excellent dielectric properties in microwave wireless devices. Since the multiphase competition that occurs during the sintering of CBS glass-ceramics, achieving a high ratio of β-CaSiO3 crystalline phases with dielectric properties is of critical importance. Here, by introducing varying levels of β-CaSiO3 crystals as seed crystals, a highly crystalline β-CaSiO3 phase was formed while achieving a dense glass-ceramic, and the crystal growth regulations were explored. Specifically, with a doping level of 3 wt% β-CaSiO3, the glass-ceramics achieve optimal densification and a crystalline phase comprising 75 % β-CaSiO3, with a low dielectric constant (5.03 at 1 MHz) and low dielectric loss (5.09 × 10?? at 1 MHz). The flexural strength exhibits 196.4 MPa. Moreover, the different crystallization stages, corresponding to various morphology crystal sizes, were identified. Our work presents a method for introducing seed crystals to induce spherical crystal growth in low-dielectric glass-ceramics. ? 2025 Elsevier Ltd and Techna Group S.r.l.