Effect of pH on the production of dispersed Bi4Ge3O12 nanoparticles by combustion synthesis

被引：17

作者：

Andrade de Jesus, Fabiane Alexsandra ^{[1
]}

Silva, Ronaldo Santos ^{[1
]}

Hernandes, Antonio Carlos ^{[2
]}

Macedo, Zelia Soares ^{[1
]}

机构：

[1] Univ Fed Sergipe, Dept Fis, Grp Mat Ceram Avancados, BR-49100100 Sao Cristovao, SE, Brazil

[2] Univ Sao Paulo, Inst Fis Sao Carlos, Grp Crescimento Cristais & Mat Ceram, BR-13560970 Sao Carlos, SP, Brazil

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2009年 / 29卷 / 01期

关键词：

Combustion processing; Grain size; Luminescence; Bi4Ge3O12; Scintillator applications; HIGH-TEMPERATURE SYNTHESIS; CERAMIC SCINTILLATORS; ALUMINA POWDER; PURE;

D O I：

10.1016/j.jeurceramsoc.2008.05.048

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：

This paper reports the production of bismuth germanate ceramic scintillator (Bi4Ge3O12) by combustion synthesis (SHS) method, focusing on the influence of the synthesis parameters on the crystalline phases and agglomeration of the nanoparticles. The synthesis and sintering conditions were investigated through thermal analysis, X-ray diffraction as function of temperature, dilatometry and scanning electron microscopy. Well-dispersed Bi4Ge3O12 powder was accomplished by the combustion of the initial solution at pH 9, followed by low temperature calcination and milling. Sintered ceramics presented relative density of 98% and single crystalline Bi4Ge3O12 phase. The luminescent properties of the ceramics were investigated by photo- and radio- luminescence measurements and reproduced the typical Bi4Ge3O12 single-crystal spectra when excited with UV, beta and X-rays. The sintered ceramics presented light output of 4.4 x 10(3) photons/McV. (c) 2008 Published by Elsevier Ltd.

引用

页码：125 / 130

页数：6

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