Synthesis of LiBGeO4 using compositional design and its dielectric behaviors at RF and microwave frequencies |
| |
| Affiliation: | 1. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, 430074, PR China;2. Key Lab of Functional Materials for Electronic Information (B), Ministry of Education, Wuhan, 430074, PR China;3. State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, PR China;1. Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, College of Materials and Chemical Engineering, China Three Gorges University, Yichang, 443002, China;2. Guangxi Key Laboratory of Optical and Electronic Materials and Devices. College of Material Science and Engineering, Guilin University of Technology, Guilin, 541004, China;3. College of Information Science and Engineering, Guilin University of Technology, Guilin, 541004, China |
| |
| Abstract: | Borates are promising candidates as dielectric substrate materials in low temperature cofired ceramics technology (LTCC) due to their relative low sintering temperatures and relative permittivities compared to their counterparts. However, synthesizing borates having single-phase is still challenging because of the volatility and hydrophilicity of boron resources. In this work, a compositional design was utilized to synthesize single-phase LiBGeO4 ceramics over a broad temperature range from 600 to 840 °C. Radio-frequency dielectric behaviours featured a strong temperature dependence, especially at high temperatures (>400 °C), which is related to the thermally activated polarizations. LiBGeO4 ceramic sintered at 820 °C has optimum microwave dielectric properties with the relative permittivity (εr) of 6.28, a quality factor (Q × f) of 21,620 GHz, and a temperature coefficient of resonance frequency (τf) of -88.7 ppm/°C. LiBGeO4 also showed chemical inertness when cofired with silver (Ag), provided an evidence for its utilization in LTCC technology. Overall, this work provides a strategy for facile synthesis of phase pure borates, via the proposed two-step process to obtain stable boron resources. |
| |
| Keywords: | Precursor synthesis Dielectric properties Ceramics Borates |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
