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- Title
Synthesis, phase structure and dielectric properties of CoTiTa<sub>2</sub>O<sub>8</sub> by molten salt method for LTCC application.
- Authors
Liao, Liwei; Zuo, Jun; Yang, Pao; Liang, Jiaji; Peng, Zhijian; Fu, Xiuli
- Abstract
The advancement of low-temperature co-fired ceramic (LTCC) technology has led to increased demands for microwave dielectric ceramics. Among various material systems, the ATiB2O8 (A = Mg2+, Zn2+, Cu2+, Co2+, Ni2+; B = Ta5+, Nb5+) family has garnered significant attention due to its high quality factor (Q × f). However, the elevated sintering temperature of this system hinders its application in LTCC technology. In this study, CoTiTa2O8 ceramics were synthesized using the molten salt method to lower the sintering temperature. The correlation between phase composition, microstructure, and microwave dielectric properties (MDP) of CoTiTa2O8 samples was investigated through XRD, Rietveld refinement, and SEM analyses. The findings reveal that CoTiTa2O8 ceramics fabricated under optimized conditions exhibit a tri-rutile structure with space group P42/mnm (136). The impact of oxygen octahedron distortion dielectric, packing fraction, and MDP is deliberated. CoTiTa2O8 samples sintered at 950 ℃ demonstrate exceptional dielectric characteristics with εr = 38.6, Q × f = 20,600 GHz, τf = + 108.42 ppm/℃, suggesting their significant potential for application in LTCC technology.
- Publication
Journal of Materials Science: Materials in Electronics, 2024, Vol 35, Issue 17, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-024-12955-0