Electronic active defects and local order in doped ZnO ceramics inferred from EPR and Al-27 NMR investigations

doi:10.1016/j.jeurceramsoc.2019.04.024

	Electronic active defects and local order in doped ZnO ceramics inferred from EPR and Al-27 NMR investigations
	Sun, Qianying; Tian, Tian; Zheng, Laoying; Man, Zhenyong; Li, Guorong; Barre, Maud; Dittmer, Jens; Bulou, Alain; Kassiba, Abdel Hadi
刊名	JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
	2019-08-01
卷号	39 期号:10 页码:3070
关键词	ZnO ceramics Doping EPR NMR Conductivity
ISSN号	0955-2219
DOI	10.1016/j.jeurceramsoc.2019.04.024
文献子类	Article
英文摘要	Doped ZnO based ceramics were fabricated by using a solid state reaction of ZnO co-doped by TiO2, Al2O3 and MgO and sintered in different atmospheres (Air, N-2, N-2 + CO). The crystalline structures consist in wurtzite ZnO and a minor spinel phase Zn2TiO4. The electrical conductivity is modulated by the sintering conditions with the highest value ((similar to)10(5) S m(-1)) obtained in the reducing atmosphere (N-2 + CO). The role of defects and vacancies on the electrical behavior was exhaustively investigated by Raman, electron paramagnetic resonance (EPR) and solid state NMR methods. The paramagnetic centres inferred from EPR studies show a Pauli-like spin susceptibility. Their origin was assigned to shallow donors from interstitial defects (Zn-i) favored by substitutional Al ions (Al-zn). The NMR spectral features with a characteristic 185 ppm line which correlates with the electrical conductivity are presumed to be caused by the Knight shift effect from the conduction electrons and the involved paramagnetic centres.
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER SCI LTD
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/26953]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 GB/T 7714	Sun, Qianying,Tian, Tian,Zheng, Laoying,et al. Electronic active defects and local order in doped ZnO ceramics inferred from EPR and Al-27 NMR investigations[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,2019,39(10):3070.
APA	Sun, Qianying.,Tian, Tian.,Zheng, Laoying.,Man, Zhenyong.,Li, Guorong.,...&Kassiba, Abdel Hadi.(2019).Electronic active defects and local order in doped ZnO ceramics inferred from EPR and Al-27 NMR investigations.JOURNAL OF THE EUROPEAN CERAMIC SOCIETY,39(10),3070.
MLA	Sun, Qianying,et al."Electronic active defects and local order in doped ZnO ceramics inferred from EPR and Al-27 NMR investigations".JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 39.10(2019):3070.