钆掺杂钨酸铅闪烁晶体的介电双弛豫峰研究

无机材料学报, 2002, 17(1): 29-34. doi: 10.3321/j.issn:1000-324X.2002.01.005

钆掺杂钨酸铅闪烁晶体的介电双弛豫峰研究

黄红伟 ^1, , DONG Ming ^2, , YE ZuO-Guang ^3, , 冯锡淇 ^4,

1.中国科学院无机功能材料开放实验室中国科学院上海硅酸盐研究所,上海,200050

2.Dept. of Chemistry, Simon Freaser University, Canada

3.Dept. of Chemistry, Simon Freaser University, Canada

4.中国科学院无机功能材料开放实验室中国科学院上海硅酸盐研究所,上海,200050

基金项目: 国家自然科学基金(59732040)

关键词：介电弛豫 , 掺Gd钨酸铅晶体 , 偶极缺陷

Dielectric Relaxation of Gd Doped PbWO4 Single Crystal

完成了钆离子(Gd3+)掺杂钨酸铅晶体在40～600°C、1～106Hz范围内介电性能的测量.在升温过程中观察的典型的介电弛豫峰,记为α峰,其激活能为0.50+0.01eV,频率因子v=1.44×109.而在降温过程中,除α峰外还出现了另一介电弛豫峰,记为β峰,其激活能为0.51+0.02eV,频率因子v=2.44×106.α峰和β峰均可用Debye方程来描述,而其相对强度呈此消彼长的趋势.分析了Gd:PWO中两种介电弛豫峰的起因及其相互关系,并讨论了它们与PWO晶体闪烁性能变化之间的关系.

参考文献

[1]	Lecoq P, Dafinei I, Auffray E, et al. Nucl.lnstr. and Meth. A, 1995, 365: 412-423.
[2]	Kobayashi M, Usuki Y, Ishii M, et al. Nucl.Instr. and Meth. A. 1999, 434: 412-423.
[3]	Baccaro S, Bohacek P, Borgia B, et al. Phys. Sta. Sol.(a), 1997, 164: R5-R6.
[4]	Baccaro S , Bohacek P, Cecilia A, et al. Proc. Int. Cont. on Inorganic Scintilltors and Their Application. Delft, Netherlands, 1996. 129.
[5]	Kobayashi M, Usuki Y, Ishii M, et al. Proc. Int. Cont. on Inorganic Scintilltors and Their Application. Delft, Netherlands, 1996. 163.
[6]	Han Baoguo, Feng Xiqi, Hu Guanqin, et al. J. Appl. Phys., 1998, 84: 2831-2834.
[7]	Li Wensheng. Dielectric Properties and Defects Structure of Lead Tungstate Crystal. [P.h D Thesis.]Hong Kong: Hong Kong Baptist University, 2000.
[8]	Lin Qisheng, Feng Xiqi, Man Zhenyong. Phys. Sta. Sol. (a), 2000, 81: R1-R3.
[9]	Quinten H J C A, Van Gemert W J Th, Stevels J M. J. Non-crystal Solids, 1979, 29: 333-345.
[10]	Stevels J M. J .Non-crystal Solids, 1980, 40: 69-82.
[11]	Lin Qisheng, Feng Xiqi, Man Zhenyong. Phys. Rew. B 2001, 63: 134105-134110.
[12]	Sorensen O T. Non-stoichiometric Oxides, New York: Academy Press, 1981. 61.
[13]	Shi Caoshu, Wei Yaguang, Yang Xiaoyu, et al. Chem. Phys. Lett., 2000, 328: 1-4.
[14]	Takao S, Sugiura K, Esaka T. Mat. Res. Bul., 1999, 34(2): 193-202.
[15]	Chen Yonghu, Ye Xiaoling, Zhou Dongfang, et al. Proc. Int. Cont. on Inorganic Scintilltors and Their Application. Moscow, Russia, 1999. 609.
[16]	科埃略R.电介质物理学,北京:科学出版社,1984.62.
[17]	Groenink J A, Binsma H. J. Solid State Chemistry, 1979, 29: 227-236.

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钆掺杂钨酸铅闪烁晶体的介电双弛豫峰研究

Dielectric Relaxation of Gd Doped PbWO4 Single Crystal

参考文献