Pressure-induced phase-transition and improvement of the microdielectric properties in yttrium-doped SrZrO3

	Pressure-induced phase-transition and improvement of the microdielectric properties in yttrium-doped SrZrO3
	Lidong Dai; Lei Wu; Heping Li; Haiying Hu; Yukai Zhuang; Kaixiang Liu
	2016
发表期刊	Epl
卷号	114 期号:5 页码:1-6
摘要	In this study, the effect of pressure on undoped and 5% yttrium-doped SrZrO3 (SZY0 and SZY5) were conducted from the ambient condition to similar to 25GPa with a diamond anvil cell. The comparison of the high-pressure Raman spectra of SZY0 and SZY5 indicate that SZY0 displays a rigid structure without any structural modification, whereas for SZY5 a structural transition at similar to 15GPa is revealed. Some characteristic physical parameters such as bulk conductivities, grain boundary conductivities, Warburg diffusion coefficient, transference number and bulk relaxation frequency were determined by the high-pressure impedance spectroscopy data. An obvious discontinuous inflexion point (at similar to 13GPa) for SZY5 sample is observable which was also verified the phase-transition of the Raman spectroscopy results. A mixed conduction mechanism for both SZY0 and SZY5 are coexisting for both SZY0 and SZY5 in a wide pressure range. The pressure-induced phase-transition of SZY5 would result in an inversion of conduction mechanism that is characterized by the dominant charge carriers transformation from electron to ion. The Maxwell-Wagner relaxation arising at the interfaces of grain and grain boundary indicates that Y-doping and pressure could make the ions diffusion much easier through the boundaries and finally enhance the dielectric performance of the sample. It is suggested that pressure could be a useful tool to manipulate the microstructure and dielectric performance of polycrystal through altering the grain boundary distribution.
学科领域	地球深部物质与流体作用地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/6513
专题	地球内部物质高温高压实验室_地球内部物质高温高压实验室_期刊论文
推荐引用方式 GB/T 7714	Lidong Dai,Lei Wu,Heping Li,et al. Pressure-induced phase-transition and improvement of the microdielectric properties in yttrium-doped SrZrO3[J]. Epl,2016,114(5):1-6.
APA	Lidong Dai,Lei Wu,Heping Li,Haiying Hu,Yukai Zhuang,&Kaixiang Liu.(2016).Pressure-induced phase-transition and improvement of the microdielectric properties in yttrium-doped SrZrO3.Epl,114(5),1-6.
MLA	Lidong Dai,et al."Pressure-induced phase-transition and improvement of the microdielectric properties in yttrium-doped SrZrO3".Epl 114.5(2016):1-6.

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