Thermo-elastic property of Ca(OH)2 portlandite

被引：12

作者：

Fukui, H

Ohtaka, O

Fujisawa, T

Kunisada, T

Suzuki, T

Kikegawa, T

机构：

[1] Osaka Univ, Toyonaka, Osaka 5600043, Japan

[2] Unit Kitakyushu, Fukuoka 8080135, Japan

[3] KEK, PF, Tsukuba, Ibaraki 3050801, Japan

来源：

HIGH PRESSURE RESEARCH | 2003年 / 23卷 / 1-2期

关键词：

portlandite; high pressure; equation of state; thermo-elasticity; X-ray diffraction; entropy;

D O I：

10.1080/0895795031000109670

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An equation of state (EoS) for Ca(OH)(2) portlandite has been obtained through measurements of pressure and temperature dependence of volume by means of in-situ X-ray observation. The bulk modulus and its pressure derivative at zero pressure calculated using third-order Birch-Mumaghan's equation of state is 33.1 GPa and 4.2 at 300 K, respectively. The unit cell parameters and the volumes have been also determined at 573 K and 673 K. Temperature derivatives of the bulk modulus and its pressure derivative have been calculated to be -0.022 GPa/K and 0.0072 K-1, respectively. Thermal expansion coefficient of portlandite has been calculated from the EoS. The pressure dependence of entropy has been obtained from the present thermo-elastic parameters.

引用

页码：55 / 61

页数：7

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