Sintering and electrical characterization of dense ceramics in bulk form of the ceramic system CuSn(x)Ti(1-x)O3 (0,0dxd1,0)

• Grant number: 22/04461-1
• Support Opportunities: Scholarships abroad - Research Internship - Scientific Initiation
• Start date: July 01, 2022
• End date: September 28, 2022
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Miguel Ángel Ramírez Gil
• Grantee: Pablo Samuel de Freitas Chaves
• Supervisor: Leandro Alfredo Ramajo
• Host Institution: Faculdade de Engenharia (FEG). Universidade Estadual Paulista (UNESP). Campus de Guaratinguetá. Guaratinguetá , SP, Brazil
• Institution abroad: Universidad Nacional de Mar del Plata (UNMdP), Argentina
• Associated to the scholarship: 21/09794-6 - Synthesis and characterization of multifunctional ceramic composites of CuSn (1-x)Ti (x)O3 (0.0dxd1.0) for optical and electrical applications, BP.IC

Abstract

Solid solutions of stannates/titanates have been studied more frequently due to the scientific and technological interest aroused by their multifunctionality, possessing several electrical applications. CuSnO3 has relevant photocatalytic activity, as does CuTiO3. However, little is known about the electrical behavior of these materials and their solid solutions, and the few articles found related to these materials are in the form of films. Thus, the objective of this project is to sinter bulks of the CuSn1-xTixO3 (0,0d xd 1,0) ceramic system from synthesized powders by solid-state reaction and to analyze the effect of replacing Sn4+ with Ti4+ on the dielectric, varistor and piezoelectric properties of the material. The powders will be sintered in a conventional furnace at appropriate temperatures and times to reach the form of dense bulks. The ceramics in the form of Bulk will be characterized by their structure and presence of crystalline phases, as well as their microstructure using techniques such as X-ray diffractometry and scanning electron microscopy. The ceramic systems will have the electrical, dielectric, and non-ohmic responses of the material studied from the techniques of impedance spectroscopy (IS) and current-voltage measurements (I-V) defining parameters as constant and dielectric loss, non-linearity coefficient, electric field of rupture, leakage current, among others related to dielectric and non-ohmic properties, respectively. The piezoelectric response will be analyzed from an impedance analyzer defining important constants such as planar coupling coefficient, electromechanical coupling factor, and the piezoelectric module of the material. (AU)