Processing and characterization of CaTiO3 perovskite ceramics

Processing and Application of Ceramics

卷:8

Dachamir Hotza¹  Alessandra E. Thomsen¹  Cristian A. Moraes²  Guilherme Gralik²  Fabiano Raupp-Pereira² 

[1] Department of Chemical Engineering (EQA), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil;

[2] Department of Mechanical Engineering (EMC), Federal University of Santa Catarina (UFSC), Florianópolis, SC, Brazil;

关键词: CaTiO3;    structural characterization;    conductivity;    thermistor;   

DOI  :  10.2298/PAC1402053G

来源: DOAJ

【 摘 要 】

Calcium titanate (CaTiO3) ceramics with perovskite structure were produced by solid state reaction. Calcium carbonate (CaCO3) and titanium dioxide (TiO2) were mixed (in molar ratios 1/1 and 3/2), and the obtained mixtures were calcined at 1150 °C in successive thermal cycles. The obtained samples were characterized bydifferential 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.

【 授权许可】

Unknown