Dielectric permittivity of kaolinite heated to high temperatures

被引：21

作者：

Leluk, Karol ^{[1
]}

Orzechowski, Kazimierz ^{[1
]}

Jerie, Kazimierz ^{[2
]}

Baranowski, Andrzej ^{[2
]}

Slonka, Tadeusz ^{[3
]}

Glowinski, Jozef ^{[3
]}

机构：

[1] Univ Wroclaw, Fac Chem, PL-50383 Wroclaw, Poland

[2] Univ Wroclaw, Inst Expt Phys, PL-50383 Wroclaw, Poland

[3] Wroclaw Univ Technol, Fac Chem, PL-50370 Wroclaw, Poland

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2010年 / 71卷 / 05期

关键词：

Positron annihilation spectroscopy; Dielectric properties; ANNIHILATION; LIFETIME;

D O I：

10.1016/j.jpcs.2010.02.008

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Heating of kaolinite from the room temperature to 600 degrees C results in a gradual decrease in the dielectric permittivity. However, when the temperature rises to 1000 degrees C the high frequency permittivity of kaolinite increases surprisingly. We suppose that the decomposition of the material produces imperfections, which liberate a small distance movement of polar groups. Positron annihilation experiments performed in this material confirm the appearance of empty volumes after kaolinite calcination. (C) 2010 Elsevier Ltd. All rights reserved.

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页码：827 / 831

页数：5

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