Study of alumosilicate porcelains: Sol-gel preparation, characterization and erosion evaluated by gravimetric method

被引：9

作者：

Bogdanoviciene, Irma ^{[1
]}

Jankeviciute, Audrone ^{[1
]}

Pinkas, Jiri ^{[2
]}

Beganskiene, Aldona ^{[1
]}

Kareiva, Aivaras ^{[1
]}

机构：

[1] Vilnius State Univ, Dept Gen & Inorgan Chem, LT-03225 Vilnius, Lithuania

[2] Masaryk Brno Univ, Dept Inorgan Chem, CZ-61137 Brno, Czech Republic

来源：

MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 11期

关键词：

Ceramics; Inorganic compounds; Oxides; Sol-gel chemistry;

D O I：

10.1016/j.materresbull.2007.11.021

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this paper, the sol-gel synthesis and characteristic properties of kalsilite-type alumosilicates (KAlSiO4 and K0.5Na0.5AlSiO4) are reported. The polycrystalline powders were characterized by thermal analysis (TG/DTA), powder X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). Single-phase kalsilite oxides have been obtained after annealing precursor gels for 5 h in the temperature range of 750-850 degrees C. It was demonstrated that crystallinity of the samples slightly depends on the temperature of annealing. From the results obtained, it could be concluded that the KAlSiO4 solids are composed of the volumetric plate-like grains with no regular size (from 5 gm to 30 pm at 750 degrees C and around 5-50 gm at 850 degrees C. Larger crystallites for mixed potassium-sodium kalsilite have formed (from 10 gm to 80 gm at 750 degrees C and > 100 mu m at 850 degrees C in comparison with potassium kalsilite samples). The erosion of obtained dental porcelain samples stored in saliva, beer and Coca-Cola was compared. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：2998 / 3007

页数：10

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