Thermal transformations of Mg(H2PO4)2.4H2O

被引：8

作者：

Samuskevich, VV ^{[1
]}

Lukyanchenko, OA ^{[1
]}

机构：

[1] Belarus Natl Acad Sci, Inst Gen & Inorgan Chem, Minsk 220072, BELARUS

来源：

THERMOCHIMICA ACTA | 1998年 / 311卷 / 1-2期

关键词：

kinetics and mechanism; phosphates; thermal transformations;

D O I：

10.1016/S0040-6031(97)00420-6

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Isothermal and non-isothermal transformations of Mg(H2PO4)(2) . 4H(2)O in vacuum, water vapour, dry and humid air atmosphere at 20-900 degrees C were studied by the methods of DTA, XRD, paper chromatographic analyses, gravimetry and optical microscopy. It has been shown that the size of initial tetrahydrate crystals and the composition of gaseous phase affect not only the dehydration rate but the chemical and phase composition of the resulting intermediates as well. At the same time, the crystalline polyphosphate [Mg(PO3)(2)](n) is the end product, irrespective of the heat-treatment conditions. (C) 1998 Elsevier Science B.V.

引用

页码：87 / 95

页数：9

共 50 条

[1] THERMAL DEHYDRATION OF MG(H2PO4)2.4H2O WITH MGO ADDITIVE
KUANYSHEVA, GS
ZHOLOMANOVA, BS
MAKASHEVA, GR
NURAKHMETOV, NN
[J]. ZHURNAL NEORGANICHESKOI KHIMII, 1990, 35 (04): : 853 - 858
[2] STUDY OF THERMAL DEHYDRATION OF MN0.5MG0.5(H2PO4)2.4H2O
TROJAN, M
BRANDOVA, D
[J]. THERMOCHIMICA ACTA, 1990, 161 (01) : 11 - 21
[3] Thermal transformations of CO(H2PO4)2•2H2O
Lukyanchenko, OA
Samuskevich, VV
[J]. THERMOCHIMICA ACTA, 1999, 327 (1-2) : 181 - 189
[4] Mg(H2PO4)2•4H2O
Miyake, M
Matsuda, N
Sato, S
Matsuda, M
Nakagawa, S
Ochiai, J
[J]. ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 1998, 54 : 702 - 703
[5] DEHYDRATION OF MG(H2PO4)2.2H2O, CO(H2PO4)2.2H2O, FE(H2PO4)2.2H2O, MN(H2PO4)2.2H2O, CD(H2PO4)2.2H2O
HINSCH, TR
GUSE, W
SAALFELD, H
[J]. JOURNAL OF CRYSTAL GROWTH, 1986, 79 (1-3) : 205 - 209
[6] THERMAL DEHYDRATION OF MN2ZN(PO4)2.4H2O
SHCHEGROV, LN
TRAPEZNIKOVA, LV
GAMARNIK, MY
[J]. INORGANIC MATERIALS, 1983, 19 (10) : 1523 - 1526
[7] PYROLYSIS AND PRODUCTS OF PYROLYSIS OF MN(H2PO4)2.2H2O AND MG(H2PO4)2.2H2O
SHCHEGROV, LN
ANTRAPTSEVA, NM
PONOMAREVA, IG
[J]. INORGANIC MATERIALS, 1989, 25 (02) : 263 - 267
[8] Topochemical transformations of Mg(H2PO4)(2)center dot 4H(2)O crystals in vacuum
Lukyanchenko, OA
Samuskevich, VV
[J]. INORGANIC MATERIALS, 1997, 33 (09) : 956 - 959
[9] Kinetics and mechanisms of reversible topochemical transformations in polycrystalline Mg(H2PO4)•2H2O
Luk'yanchenko, OA
Samuskevich, VV
[J]. INORGANIC MATERIALS, 1998, 34 (04) : 373 - 376
[10] THERMAL DEHYDRATION OF CA(H2PO4)2.H2O AND MG(H2PO4)2.2H2O AND THEIR MIXTURES WITH KCL AND SILICIC-ACID ADDITIONS
PYLDME, ME
PYLDME, YK
TYNSUAADU, KO
VEIDERMA, MA
[J]. ZHURNAL NEORGANICHESKOI KHIMII, 1981, 26 (01): : 58 - 61

← 1 2 3 4 5 →