Processing and characterization of CaTiO3 perovskite ceramics

被引：21

作者：

Gralik, Guilherme ^{[1
]}

Thomsen, Alessandra E. ^{[2
]}

Moraes, Cristian A. ^{[1
]}

Raupp-Pereira, Fabiano ^{[1
]}

Hotza, Dachamir ^{[2
]}

机构：

[1] Fed Univ Santa Catarina UFSC, Dept Mech Engn EMC, Florianopolis, SC, Brazil

[2] Fed Univ Santa Catarina UFSC, Dept Chem Engn EQA, Florianopolis, SC, Brazil

来源：

PROCESSING AND APPLICATION OF CERAMICS | 2014年 / 8卷 / 02期

关键词：

CaTiO3; structural characterization; conductivity; thermistor;

D O I：

10.2298/PAC1402053G

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：

Calcium titanate (CaTiO3) ceramics with perovskite structure were produced by solid state reaction. Calcium carbonate (CaCO3) and titanium dioxide (TiO 2) were mixed (in molar ratios 1/1 and 3/2), and the obtained mixtures were calcined at 1150 degrees C in successive thermal cycles. The obtained samples were characterized by differential thermal analysis, thermogravimetry, X-ray diffraction, measurement of particle size distribution and linear thermal shrinkage. XRD results indicated that the samples have perovskite CaTiO3 structure with small amount of secondary CaO and TiO2 phases, and their phase composition depends on the heat treatment conditions. The measured values of electrical resistivity were within the characteristic range of insulating materials and approach values corresponding to semiconducting ceramics.

引用

页码：53 / 57

页数：5