Título:	The influence of the synthesis method on the characteristics of BaTiO3
Autor(es):	Almeida, G. N. Souza, Rodrigo Nunes de Lima, L. F. S. Mohallem, Nelcy Della Santina Silva, Edson Paulo da Silva, Alysson Martins Almeida
ORCID:	https://orcid.org/0000-0002-6200-3253 https://orcid.org/0000-0002-9094-4536
Afiliação do autor:	University of Brasília, Faculty of Technology, Mechatronic Engineering Department University of Brasília, Faculty of Technology, Mechanical Engineering Department Federal University of Minas Gerais, Chemistry Department Federal University of Minas Gerais, Chemistry Department University of Brasília, Faculty of Technology, Mechanical Engineering Department University of Brasília, Faculty of Technology, Mechanical Engineering Department
Assunto:	Titanato de bário Processos sol-gel Propriedades elétricas
Data de publicação:	11-Abr-2023
Editora:	MDPI
Referência:	ALMEIDA, G. N. et al. The influence of the synthesis method on the characteristics of BaTiO3. Materials, [S. l.], v. 16, n. 8, 3031, 2023. DOI: https://doi.org/10.3390/ma16083031. Disponível em: https://www.mdpi.com/1996-1944/16/8/3031. Acesso em: 09 jul. 2024.
Abstract:	In this work, barium titanate powders were produced by sol-gel and sol-precipitation methods from metal alkoxides. In the sol-gel method, tetraisopropyl orthotitanate was mixed with 2-propanol, acetic acid and barium acetate and the gel samples obtained were calcined at 600 °C, 800 °C and 1000 °C. Through the sol-precipitation method, tetraisopropyl orthotitanate was mixed with acetic acid and deionized water and precipitated by addition of a concentrated solution of KOH. The products were calcined at various temperatures and the microstructural and dielectric properties of BaTiO3 prepared for the two processes were analyzed and compared. The result of these analyzes allowed to observe in the samples produced by the sol-gel method an increase in the tetragonal phase and the dielectric constant (15 – 50 at 20 kHz) with increasing temperature, while the sample obtained by sol precipitation was cubic. The presence of BaCO3 is more evident in the sample produced by sol-precipitation and the band gap of the products obtained did not show significant variation, changing the synthesis method (3.363 - 3.594 eV).
Unidade Acadêmica:	Faculdade de Tecnologia (FT) Departamento de Engenharia Elétrica (FT ENE)
Licença:	© 2023 by the authors. Submitted for possible open access publication under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/license s/by/4.0/).
DOI:	https://doi.org/10.3390/ma16083031
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