Borate, lithium borate, and borophosphate powders by sol-gel precipitation

被引：15

作者：

Bengisu, M. ^{[1
]}

Yilmaz, E. ^{[2
]}

Farzad, H. ^{[3
]}

Reis, S. T. ^{[4
]}

机构：

[1] Eastern Mediterranean Univ, Dept Ind Engn, Mersin 10, Turkey

[2] Eastern Mediterranean Univ, Dept Chem, Mersin 10, Turkey

[3] Eastern Mediterranean Univ, Dept Mech Engn, Mersin 10, Turkey

[4] Univ Missouri, Dept Mat Sci, Rolla, MO 65409 USA

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2008年 / 45卷 / 03期

关键词：

sol-gel; borate; glass; P2O5; chemical durability;

D O I：

10.1007/s10971-008-1681-8

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：

Borate, lithium borate and borophosphate powders were synthesized by the sol-gel method. Triethyl borate, lithium methoxide, and orthophosphoric acid were used as precursors for B2O3, Li2O, and P2O5, respectively. Powders were characterized by FTIR, DTA, XRD and SEM techniques. Powders from the Li2O-B2O3 system exhibited glassy features while borate and borophosphate powders contained mainly crystalline B2O3 according to XRD analysis. However, a 500 degrees C heat treatment transformed these crystalline powders into glass powders. Conversely, heat treatment of Li2O-B2O3 powders transformed their structure from glassy to crystalline (Li2B4O7). Chemical durability studies conducted in water at 60 degrees C showed that minor additions of P2O5 into borate and lithium borate powders improved their chemical durability significantly. Furthermore, Li2O and P2O5 acted synergistically on the chemical durability when added simultaneously to borate compositions.

引用

页码：237 / 243

页数：7

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