Microwave dielectric properties of Ba5Nb4O15 ceramic by molten salt method |
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Authors: | Huanfu Zhou Xiuli Chen Liang Fang Changzheng Hu Hong Wang |
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Affiliation: | (1) Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, Guilin University of Technology, 541004 Guilin, China;(2) Electronic Materials Research Laboratory, Key Laboratory of the Ministry of the Education, Xi’an Jiaotong University, 710049 Xi’an, China |
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Abstract: | Ba5Nb4O15 powders were synthesized by molten-salt method in NaCl–KCl flux at a low temperature of 650–900 °C for 2 h, which is lower than that of the conventional solid-state reaction. This simple process involved mixing of the raw materials and salts in a certain proportion. Subsequent calcination of the mixtures led to Ba5Nb4O15 powders at 650–900 °C. XRD and SEM techniques were used to characterize the phase and morphology of the fabricated Ba5Nb4O15 powders, respectively. After sintering at 1,300 °C for 2 h, the densified Ba5Nb4O15 ceramics with good microwave dielectric properties of εr = 39.2, Q × f approximated as 27,200 GHz and τ f = 72 ppm/°C have been obtained. |
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