MgF2掺杂对0.95MgTiO3-0.05CaTiO3陶瓷结构与微波性能的影响

doi:10.19976/j.cnki.43-1448/TF.2023022

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Abstract MgF₂ doped 0.95MgTiO₃-0.05CaTiO₃ (95MCT) microwave ceramics were synthesized by solid-phase reaction. The effects of MgF₂ doping on the sintering temperature, crystal structure, microstructure and microwave properties of 95MCT ceramics were characterized by X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and vector network analyzer. The results show that a small amount of MgF₂ doping can promote the uniform growth of ceramic grains. The addition of MgF₂ inhibits the transition of Ti⁴⁺ ions to Ti³⁺ ions and enhances the Ti—O bonding strength of [TiO₆] octahedra, thus significantly improving the quality factor of ceramics from 30 335 GHz to 89 470 GHz. MgF₂ doped with 1% (mass fraction) of 95MCT ceramic sintered at 1 225 ℃ has excellent microwave properties: the relative permittivity ε_r is about 19.74, the Q×f value is about 89 470 GHz, and the resonant frequency temperature coefficient τ_f is about -10.2×10^-6 ℃^-1.

Key words： MgTiO₃-CaTiO₃ceramic MgF₂ doping [TiO₆] octahedra sintering temperature microwave property

Received: 17 March 2023 Published: 06 July 2023

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	RAN Wen
	LIU Fan
	LI Hao
	LIU Shaojun

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RAN Wen,LIU Fan,LI Hao, et al. Effects of MgF₂ doping on structure and microwave property of 0.95MgTiO₃-0.05CaTiO₃ ceramics[J]. Materials Science and Engineering of Powder Metallurgy, 2023, 28(3): 253-261.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2023022 OR http://pmbjb.csu.edu.cn/EN/Y2023/V28/I3/253

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