Modified Pechini synthesis of tricalcium aluminate powder

被引：24

作者：

Voicu, Georgeta ^{[1
]}

Ghitulica, Cristina Daniela ^{[1
]}

Andronescu, Ecaterina ^{[1
]}

机构：

[1] Univ Politehn Bucuresti, Sci & Engn Oxide Mat & Nanomat Dept, Fac Appl Chem & Mat Sci, Bucharest 011061, Romania

来源：

MATERIALS CHARACTERIZATION | 2012年 / 73卷

关键词：

Tricalcium aluminate; Modified Pechini synthesis; Thermal treatment; Morphology; Bioactivity; MINERAL TRIOXIDE AGGREGATE; SEALING ABILITY; CALCIUM;

D O I：

10.1016/j.matchar.2012.08.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Tricalcium aluminate (Ca3Al2O6-C(3)A) was obtained by a modified Pechini synthesis in order to eliminate successive thermal treatments and intermediate grinding usually performed between the two sintering steps and in order to reduce the sintering temperature. Our results indicated that pure C(3)A was obtained, by a single step thermal treatment at 1300 degrees C for 4 h and 1350 degrees C for 1 h. The synthesis was confirmed by XRD, FT-IR and free lime analyses. The morphology of synthesised C(3)A was assessed by electron microscopy (SEM and TEM, HRTEM) and it was observed a high tendency of the particles to form aggregates and the individual particles seem to be single crystals. The bioactivity was assessed by specimen soaking in simulated body fluid (SBF) for 7 days; the hydrate (i.e. 3CaO center dot Al2O3 center dot 6H(2)O formed at the C(3)A surface), can act as nucleation centers for the resulted phosphate phases. (C) 2012 Elsevier Inc. All rights reserved.

引用

页码：89 / 95

页数：7

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