复合钙钛矿型Ba[(Co1-xMgx)1/3Nb2/3]O3基微波陶瓷的结构与性能

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Abstract Ba[(Co_1-_xMg_x)_1/3Nb_2/3]O₃(0.0≤x≤0.4) microwave ceramics were prepared by the conventional solid reaction method. The relationship between the B site 1:2 ordering and microwave dielectric properties of Mg-doped Ba(Co_1/3Nb_2/3)O₃ microwave ceramics were clarified using dielectric performance test XRD, Raman and TEM. The results show that the Q∙f of Mg-doped Ba(Co_1/3Nb_2/3)O₃ ceramics is increased because the B site 1:2 ordering degree is enhanced. The highest ordering degree of the ceramics doped with x=0.2 is obtained at 1 420 ℃. After annealing at 1 300 ℃ for 24 h, the ordering degree of 1:2 in B site is further improved, and the second phase is eliminated. Microwave properties with ε_r=30.94, Q∙f=63 161 GHz, τ_f =4.1 ppm/℃ comparable to those of conventional Ta based composites perovskite microwave ceramics are obtained.

Key words： microwave ceramics perovskite doping order-disorder transition microwave properties

Received: 01 April 2017 Published: 11 July 2019

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	LIU Liang
	HUANG Zonglian
	XIAO Ya
	CHENG Lijin
	LIU Shaojun

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LIU Liang,HUANG Zonglian,XIAO Ya, et al. Crystal structure and dielectric properties of complex perovskite Ba[(Co_1-_xMg_x)_1/3Nb_2/3]O₃ microwave ceramics[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(1): 78-84.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I1/78

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