Abstracts Book - IMRC 2018

• SE2-P034
SYNTHESIS, MICROSTRUCTURE, AND PHASE STABILITY OF NEW
CERAMIC MATERIALS In1+x(Ti1/2Zn1/2)1-xO3(ZnO)m (m = 2, 4, and 6; x =
0.5) AND THEIR DIELECTRIC PROPERTIES
Fructuoso Hernandez Orozco 1 , Victor Alvarez Montaño 1 , Francisco Brown 2
1 Universidad de Sonora, Departamento de Ingenieria Quimica y Metalurgia, Mexico.
2 Universidad de Sonora, Departamento de Investigación en Polímeros y Materiales, Mexico.
New ceramic materials with a layered crystal structure having the chemical
formula In 1.5 (Ti 1/2 Zn 1/2 ) 0.5 O 3 (ZnO) m (m = 2, 4, and 6), here named ITZO-2, ITZO-4,
and ITZO-6, have been synthesized. The microstructure and phase stability have
been studied by Scanning Electron Microscopy (SEM) and X-ray Powder
Diffractometry (XRD), respectively. It is observed that samples sintered at 1200,
1300, and 1400 °C showed single phase at 1200 °C, whereas at higher
temperatures, they decompose in secondary phases like In 2 O 3 solid solution and
ZnO (zincite). The SEM micrograph of these samples showed an increase in the
grain size with increase in sintering temperature, indicating a reduction in
porosity, and increasing the bulk density. At 1400 °C some hexagonal patterns
are observed in the semi-melted sintered samples, indicating the presence of
small amounts of these compounds. Samples were coated with silver to prepare
them for dielectric measurements at selected frequencies room temperature to
500 °C. The optical band gap will be obtained by the absorption spectrum and
Kubelka-Munk transformation.
Acknowledgment:
This research was supported by the Department of Chemical Engineering and
Metallurgy the Universidad de Sonora . We thank our colleagues the
Department of Polymers and Materials Research who provided insight and
expertise that greatly assisted the research.
Keywords: Ceramic, phase stability, DIELECTRICS
Presenting authors email: fructuoso_h2o@hotmail.com