کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9829523 | 1524493 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal properties of lead germanate single crystals grown by the vertical Bridgman method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
 Lead germanate single crystals (Pb5Ge3O11:PGO) have been grown by the vertical Bridgman method. The dielectric measurements show that the Curie temperature of the PGO crystal is 447 K and the dielectric constant at room temperature is about 30. Thermal properties including specific heat, thermal diffusivity, thermal conductivity and thermal expansion have been investigated as a function of temperature for the first time. The specific heat of the PGO crystals has been measured to be 0.327 J/(g K) at 298 K. The thermal diffusivity and the thermal conductivity for PGO crystals are about 0.323 mm2/s and 0.763 W/(m K) at 298 K, respectively. The average thermal expansion coefficients along the a- and c-directions of PGO crystals, calculated from 323-447 K, are 8.68Ã10â6 and 6.60Ã10â6 /K; however, it changes to 10.55Ã10â6 and 6.07Ã10â6 /K between 448-573 K, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 282, Issues 1â2, 15 August 2005, Pages 160-164
Journal: Journal of Crystal Growth - Volume 282, Issues 1â2, 15 August 2005, Pages 160-164
نویسندگان
Xianjun Wu, Jiayue Xu, Weiqing Jin,