Novel fabrication of monodispersed peanut-type celestine particles using Sr-EDTA chelating precursors

被引：9

作者：

Li, Yu-Feng ^{[1
]}

Ouyang, Jia-Hu ^{[1
]}

Zhou, Yu ^{[1
]}

机构：

[1] Harbin Inst Technol, Inst Adv Ceram, Dept Mat Sci, Harbin 150001, Heilongjiang, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2008年 / 111卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

strontium sulfate; EDTA; growth mechanism; mesopore;

D O I：

10.1016/j.matchemphys.2008.05.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Novel monodispersed peanut-type SrSO4 (celestine) particles have been prepared using a facile precipitation reaction of Sr-EDTA chelating precursors at ambient temperature. The as-formed products were studied by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen absorption-desorption and differential scanning calorimetry-thermogravimetry (DSC-TG) measurement. The monodispersed SrSO4 particles with an average length of 1.7 mu m and an aspect ratio of 1.4 appear unusual peanut-type morphology. These SrSO4 Particles have a relatively large Brunauer-Emmett-Teller (BET) surface area of about 20.9 m(2) g(-1) and contain mesopores with a mean pore size of about 34.3 nm. The SrSO4 particles exhibit an excellent thermal stability from room temperature to 1400 degrees C with a structural transformation at 1158.3 degrees C. The growth mechanism of the monodispersed peanut-type celestine particles was discussed to obtain a better understanding on their formation process. (C) 2008 Elsevier B. V. All rights reserved.

引用

页码：508 / 512

页数：5

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