EVALUATION OF α-TRICALCIUM PHOSPHATE CEMENT OBTAINED AT DIFFERENT TEMPERATURES

被引：2

作者：

Vieira, R. S. ^{[1
]}

Coelho, W. T. ^{[1
]}

Thuermer, M. B. ^{[1
]}

Fernandes, J. M. ^{[1
]}

Santos, L. A. ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, Dept Mat Engn, Porto Alegre, RS, Brazil

来源：

ADVANCED POWDER TECHNOLOGY VIII, PTS 1 AND 2 | 2012年 / 727-728卷

关键词：

Calcium phosphate cements; alpha-tricalcium phosphate; compressive strength;

D O I：

10.4028/www.scientific.net/MSF.727-728.1187

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The calcium phosphate cements (CPCs) based on alpha-tricalcium phosphate (alpha-TCP) are highly attractive for use in medicine and odontology, since they have similar chemical and phase composition of mineral phase of bones (calcium deficient hydroxyapatite (CDHA)). However, one of the biggest difficulties for use of this type of cement is its low mechanical strength due to the presence of undesirable phases, such as beta-tricalcium phosphate. The route for obtaining alpha-TCP is at high temperature by solid state reaction, mixing calcium carbonate and calcium pyrophosphate. The aim of this work was to obtain calcium phosphate cements with improved strength, by studying the obtaining of alpha-TCP at temperatures of 1300, 1400 and 1500 degrees C. The samples were analyzed by crystalline phases, pH, setting time, particle size, in vitro test (Simulated Body Fluid), porosity, density and compressive strength. The results show that the synthesis temperatures influence strongly the phases of powders obtained and the mechanical properties of cement, being unnecessary quenching for obtaining pure alpha-TCP.

引用

页码：1187 / 1192

页数：6

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