THERMAL-DECOMPOSITION OF CALCIUM HYDROXIDE DEPOSITED ON THE SUBSTRATE

被引：11

作者：

SAWADA, Y

ITO, Y

机构：

[1] Department of Industrial Chemistry, Faculty of Engineering, Tokyo Institute of Polytechnics, Atsugi-shi, Kanagawa, 243-02

来源：

THERMOCHIMICA ACTA | 1994年 / 232卷 / 01期

关键词：

D O I：

10.1016/0040-6031(94)80044-8

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Calcium hydroxide particles deposited on substrates have been investigated by thermal analysis. Dehydration was successfully detected by DSC (heating rate, 1-20-degrees-C min-1) for the specimen (thickness about 0.80-2.57 mum) as-deposited on the glass substrate (5 mm x 5 mm x 0.15 mm). The peak temperature and the heat of dehydration (278 +/- 10 cal g-1) was independent of the thickness in the present study. The deviation from the thermochemical data (328 cal g-1) was explained semi-quantitatively as being due to CaCO3 impurity; this hypothesis was supported by the TG-DTA of the deposit removed from the bottom of the vessel.

引用

页码：47 / 54

页数：8

共 12 条

[1]

BARIN I, 1973, THERMOCHEMICAL PROPE, P174

[2]

GALLAGHER PK, 1992, J THERM ANAL, V238, P17

[3] THERMAL DECOMPOSITION OF BRUCITE .2. KINETICS OF DECOMPOSITION IN VACUUM [J].

GORDON, RS ;

KINGERY, WD .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1967, 50 (01) :8-&

[4] RATE ENHANCEMENT OF THE DEHYDRATION OF CA(OH)2 UNDER REDUCED PRESSURES [J].

LEE, SK ;

MATSUDA, H ;

HASATANI, M .

KAGAKU KOGAKU RONBUNSHU, 1986, 12 (02) :165-171

[5]

LESKELA M, 1992, 10TH INT CONF THERM, P146

[6] PREPARATION OF AN OXIDE FILM THROUGH A HYDROXIDE COMPOUND LAYER [J].

MORITA, K ;

KAMBE, S ;

OHSHIMA, S ;

OKUYAMA, K .

APPLIED PHYSICS LETTERS, 1992, 60 (17) :2156-2158

[7]

SAWADA Y, 1989, NETSU SOKUTEI, V16, P185

[8]

SAWADA Y, 1992, 10TH INT CONF THERM, P330

[9]

TANAKA H, 1989, GYPSUM LIME, V220, P130

[10]

WEAST RC, 1971, CRC HDB CHEM PHYSICS, pB77

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