Development and Study of Electroceramic Materials with Technological Interest

• Grant number: 18/24352-7
• Support Opportunities: Research Grants - Visiting Researcher Grant - Brazil
• Start date: March 01, 2019
• End date: February 29, 2020
• Field of knowledge: Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
• Principal Investigator: Antônio Carlos Hernandes
• Grantee: Antônio Carlos Hernandes
• Visiting researcher: Jose de Los Santos Guerra
• Visiting researcher institution: Universidade Federal de Uberlândia (UFU). Instituto de Física, Brazil
• Host Institution: Instituto de Física de São Carlos (IFSC). Universidade de São Paulo (USP). São Carlos , SP, Brazil

Abstract

The objective of the present project is to synthesize and characterize the physical properties of electro-ceramic materials for application in electronic devices. The proposed materials are based on ferroelectric and ferroelectric systems obtained through sintering processes from conventionally processed ceramic powders and polymeric precursors chemical method (modified Pechini´s method). The application of different synthesis procedures aims the optimization the physical parameters of the most relevant properties, in order to obtain highly dense systems with enhanced response for devices applications (energy storage). The analyses of the obtained results, related to the determination of the physical properties of the proposed materials will be conducted in such a way that they can be inserted within the current theories reported in the literature. When possible, new interpretations leading to the understanding of the observed phenomena will be proposed. From these results, a critical evaluation of the studied materials viewing their insertion in practical applications will be carried out. On the other hand, with the execution of the present project a new research topic could be consolidated, in particular that one related to the study of ferroelectric/antiferroelectric ceramic systems with application in high efficiency storage devices. This will noticeably contribute for the development of commercially capable new electro-electronic devices devoted for the environmental preservation. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

CARRERAS-CASAS, C.; GARCIA-ZALDIVAR, O.; PELAIZ-BARRANCO, A.; GONZALEZ-ABREU, Y.; CALDERON-PINAR, F.; GUERRA, J. D. S.. Relaxor ferroelectric behavior: An approach considering both the dipolar and electrical conductivity contributions. JOURNAL OF ADVANCED DIELECTRICS, v. 11, n. 03, JUN 2021. (18/24352-7)

GUERRA, J. D. S.; SILVA, M. C. O.; SILVA, A. C.; OLIVEIRA, M. A.; MENDEZ-GONZALEZ, Y.; MONTE, A. F. G.; M'PEKO, J-C; HERNANDES, A. C.. Structural, electrical and optical properties of (K,Ba)(Nb,Ni)O3-delta electroceramics: Oxygen vacancy and grain size effects. CERAMICS INTERNATIONAL, v. 46, n. 12, p. 20201-20206, AUG 15 2020. (18/24352-7)