Synthesis of AlPO4-5 powder by microwave heating:: Influence of starting gel pH and reaction time

被引：45

作者：

Kodaira, T

Miyazawa, K

Ikeda, T

Kiyozumi, Y

机构：

[1] Natl Inst Adv Interdisciplinary Res, Tsukuba, Ibaraki 3058562, Japan

[2] Natl Inst Mat & Chem Res, Tsukuba, Ibaraki 3058565, Japan

[3] Univ Tsukuba, Inst Appl Phys, Tsukuba, Ibaraki 3058573, Japan

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 1999年 / 29卷 / 03期

关键词：

AlPO4-5; microwave heating; pH; reaction time; synthesis;

D O I：

10.1016/S1387-1811(99)00002-5

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Extremely pure AlPO4-5 powder was synthesized using a microwave heating method. The yield as well as the size distribution of the AlPO4-5 crystals depended on the pH value of the starting gel. On reducing the pH value from 7.0 to 4.0, the average size of the product crystal was found to increase, the size distribution became wider, and the yield increased. The pH value of the supernatant liquid after the synthesis was always ca. 7.5, independent of the pH values of the starting gels. During the first step of crystallization, disk-like crystals are formed, and they grow in the c-axis direction resulting in the formation of a hexagonal rod-like shape. The channels of the crystals are completely open, and, therefore, the crystals obtained are suitable for use as a host to stabilize guest materials. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：329 / 337

页数：9

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