Doping effects of Ta on conductivity and microwave dielectric loss of MgTiO3 ceramics

doi:10.1111/j.1551-2916.2007.01899.x

CORC > 化学研究所 > 中国科学院化学研究所

	Doping effects of Ta on conductivity and microwave dielectric loss of MgTiO3 ceramics
	Kuang, Xiao-Jun ; Xia, Hai-Ting ; Liao, Fu-Hui ; Wang, Chun-Hai ; Li, Lei ; Jing, Xi-Ping ; Tang, Zong-Xi
刊名	JOURNAL OF THE AMERICAN CERAMIC SOCIETY
	2007-10-01
卷号	90 期号:10 页码:3142-3147
ISSN号	0002-7820
DOI	10.1111/j.1551-2916.2007.01899.x
英文摘要	Two kinds of solid solution systems of Ta-doped MgTiO3 were identified by X-ray diffraction, which can be represented by the formulae MgTi1-x(Mg1/3Ta2/3)(x)O-3 (0 <= x < 0.5) and MgTi1-xTaxO3 (0 <= x < 0.05). The conductivity and microwave dielectric loss for the two solid solution systems were examined by AC impedance and microwave resonator measurements, respectively. In the system MgTi1-x(Mg1/3Ta2/3)(x)O-3, the mechanism for the solid solution formation is the isovalent substitution of (Mg1/32+Ta2/35+)for Ti4+. In the system MgTi1-xTaxO3, the doping mechanism is the aliovalent substitution of Ta5+ for Ti4+, where for a small amount Ta doping, the oxygen vacancies formed during the high-temperature preparation are filled by an extra oxygen introduced from Ta2O5 and further Ta doping leads to an increase in the contents of Ta-Ti and electrons, which was consistent with conductivity measurements. In both systems, the Q x f values improved, e.g., similar to 17% for the isovalent substitution at x=0.08 and similar to 10% for the aliovalent substitution at x=0.02. The filling oxygen vacancy and the substitution of Ta/Mg for Ti may contribute to the improvement of Q x f values for both systems.
语种	英语
出版者	BLACKWELL PUBLISHING
WOS记录号	WOS:000249663000018
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/62275]
专题	中国科学院化学研究所
通讯作者	Jing, Xi-Ping
作者单位	1.Peking Univ, Beijing Natl Lab Mol Sci, State Key Lab Rare Earth Mat Chem & Appl, Coll Chem & Mol Engn, Beijing 100871, Peoples R China 2.Univ Elect Sci & Technol China, Coll Elect Engn, Chengdu 610054, Peoples R China
推荐引用方式 GB/T 7714	Kuang, Xiao-Jun,Xia, Hai-Ting,Liao, Fu-Hui,et al. Doping effects of Ta on conductivity and microwave dielectric loss of MgTiO3 ceramics[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY,2007,90(10):3142-3147.
APA	Kuang, Xiao-Jun.,Xia, Hai-Ting.,Liao, Fu-Hui.,Wang, Chun-Hai.,Li, Lei.,...&Tang, Zong-Xi.(2007).Doping effects of Ta on conductivity and microwave dielectric loss of MgTiO3 ceramics.JOURNAL OF THE AMERICAN CERAMIC SOCIETY,90(10),3142-3147.
MLA	Kuang, Xiao-Jun,et al."Doping effects of Ta on conductivity and microwave dielectric loss of MgTiO3 ceramics".JOURNAL OF THE AMERICAN CERAMIC SOCIETY 90.10(2007):3142-3147.