Low-temperature sintering and microwave dielectric properties of CaMg1-xLi2xSi2O6 (x =0-0.3) ceramics

• 作者: Fangyi HUANG Hua SU Huaiwu ZHANG Xiaoli TANG Yuanxun LI
• 来源期刊: 先进陶瓷（英文版）
• 年，卷（期）: 2020,（4）
• 所属期刊栏目: Research Article
• 页码范围: 471-480
• 页数: 10页
• 语种: 英文

摘要

In this study,low-temperature fired CaMg1-xLi2xSi2O6 microwave dielectric ceramics were prepared via the traditional solid-state reaction method.In this process,0.4 wt％ Li2CO3-B2O3-SiO2-CaCO3-Al2O3 (LBSCA) glass was added as a sintering aid.The results showed that ceramics consisted of CaMgSi2O6 as the main phase.The second phases were CaSiO3 always existing and Li2SiO3 occurring at substitution content x ＞ 0.05.Li+ substitution effectively lowered sintering temperature due to 0.4 wt％ LBSCA and contributed to grain densification,and the most homogeneous morphology could be observed at x =0.05.The effects of relative density,the second phase,and ionic polarizability on dielectric constant (εr) were investigated.The quality factor (Q × f) varied with packing fraction that concerned the second phase.Moreover,the temperature coefficient of the resonant frequency (τf) was influenced by MgO6 octahedral distortion and bond valence.Excellent dielectric properties of the CaMg1-xLi2xSi2O6 ceramic was exhibited at x =0.05 with εr =7.44,Q × f=41,017 GHz (f=15.1638 GHz),and τf=-59.3 ppm/℃ when sintered at 900 ℃.It had a good application prospect in the field of low-temperature co-fired ceramic (LTCC) substrate and devices.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	Fangyi HUANG		1	0	0.0	0.0
2	Hua SU		1	0	0.0	0.0
3	Yuanxun LI		1	0	0.0	0.0
4	Huaiwu ZHANG		1	0	0.0	0.0
5	Xiaoli TANG		1	0	0.0	0.0