Effects of surface state of nanocrystal PbTiO3 on their dielectric properties

	Effects of surface state of nanocrystal PbTiO3 on their dielectric properties
	Ruan S. P.; Wang J.; Zhang L.; Yang D.; Xuan L.
	2003
发表期刊	Acta Physico-Chimica Sinica
ISSN	1000-6818
卷号	19 期号:7 页码:593-596
摘要	Nanocrystalline PbTiO3 powder was obtained by melting appropriate amount of stearic acid at 70 degreesC, into which tetrabutyl titanate and lead acetate were added while stirring. Then the solution was cooled in cool water to form a gel and the gel was calcined at different temperatures. The products were characterized by X-ray powder diffraction and infrared spectra analysis. The surface state was analyzed by means of X-ray photoelectron spectroscopy and surface photovoltage spectroscopy (SPS). The results show that the surface structure of nanocrystalline PbTiO3 is not integrate mainly due to the existence of oxygen cavities and most of the exposing atoms on the grain surface are metal ions. With the reducing of grain size, the oxygen cavity defect increases, the photovoltage effect on the surface enhances and the width of SPS becomes wider. The surface states of nanocrystalline materials have important influence on their dielectric properties and make the static state dielectric constant much bigger than that of bulk material.
收录类别	SCI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/34069
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Ruan S. P.,Wang J.,Zhang L.,et al. Effects of surface state of nanocrystal PbTiO3 on their dielectric properties[J]. Acta Physico-Chimica Sinica,2003,19(7):593-596.
APA	Ruan S. P.,Wang J.,Zhang L.,Yang D.,&Xuan L..(2003).Effects of surface state of nanocrystal PbTiO3 on their dielectric properties.Acta Physico-Chimica Sinica,19(7),593-596.
MLA	Ruan S. P.,et al."Effects of surface state of nanocrystal PbTiO3 on their dielectric properties".Acta Physico-Chimica Sinica 19.7(2003):593-596.

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