Template formation of magnesium aluminate (MgAl2O4) spinel microplatelets in molten salt

被引：56

作者：

Jayaseelan, Daniel Doni ^{[1
]}

Zhang, Shaowei ^{[2
]}

Hashimoto, Shinobu ^{[3
]}

Lee, William Edward ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Mat, London SW7 2AZ, England

[2] Univ Sheffield, Dept Mat Engn, Sheffield S1 3JD, S Yorkshire, England

[3] Nagoya Inst Technol, Dept Mat & Environm Engn, Nagoya, Aichi 4660064, Japan

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2007年 / 27卷 / 16期

基金：

英国工程与自然科学研究理事会;

关键词：

molten salt synthesis; platelets;

D O I：

10.1016/j.jeurceramsoc.2007.03.027

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Magnesium aluminate, MgAl2O4 (MA), microplatelets were synthesized using a molten salt technique. alpha-Alumina platelets partially decomposed from aluminium sulphate were reacted with either commercial magnesium oxide or magnesium nitrate in the molar ratio 1:1 to synthesize spinet platelets. Molten salts Such as chloride, MCI (M = Li, Na, and K) and potassium sulphate were used for MA synthesis and the salt to oxide ratio was kept at 3:1 for all compositions. Reactants and molten salt mixes were fired in an alumina crucible for 3 h at from 800 to 1150 degrees C. XRD revealed complete MA without formation of any secondary phase for powders fired for 3 h at 1100 degrees C. Electron microscopy revealed the MA platelet morphology and size was the same as the alpha-alumina platelets indicating a 'template process' during molten salt synthesis. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：4745 / 4749

页数：5

共 15 条

[1] Formation of magnesium spinel in the presence of LiCl [J].

Alvarez, FH ;

Pasquevich, DM ;

Bohé, A .

JOURNAL OF MATERIALS SCIENCE, 2005, 40 (05) :1193-1200

[2] HIGH-TEMPERATURE MECHANICAL-BEHAVIOR OF STOICHIOMETRIC MAGNESIUM SPINEL [J].

BAUDIN, C ;

MARTINEZ, R ;

PENA, P .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1995, 78 (07) :1857-1862

[3]

DU Y, 1996, SYNTHESIS CERAMIC PO

[4] Synthesis of magnesium aluminate spinel platelets from α-alumina platelet and magnesium sulfate precursors [J].

Hashimoto, S ;

Zhang, SW ;

Lee, WE ;

Yamaguchi, A .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2003, 86 (11) :1959-1961

[5] Synthesis of MgAl2O4 whiskers by an oxidation-reduction reaction [J].

Hashimoto, S ;

Yamaguchi, A .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1996, 79 (02) :491-494

[6] Synthesis of α-Al2O3 platelets using sodium sulfate flux [J].

Hashimoto, S ;

Yamaguchi, A .

JOURNAL OF MATERIALS RESEARCH, 1999, 14 (12) :4667-4672

[7] Synthesis of MgAl2O4 (spinel) powder using MgCl2 [J].

Hashimoto, S ;

Yamaguchi, A .

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN, 2001, 109 (10) :894-896

[8]

HOBBS JW, 1999, Patent No. 99012841

[9]

Kimura T., 1983, Ceramics International, V9, P13, DOI 10.1016/0272-8842(83)90004-4

[10] PREPARATION AND CRYSTALLIZATION OF ALKALINE-EARTH METAL-SALTS FROM NON-STOICHIOMETRIC MELTS [J].

ROY, BN ;

PACKTER, A .

PROGRESS IN CRYSTAL GROWTH AND CHARACTERIZATION OF MATERIALS, 1983, 6 (03) :305-359

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