Structure features of barium and calcium titanate ceramics
O.V. Malyshkina, A.I. Ivanova, K.S. Karelina, R.A. Petrov
Tver State University
Abstract: Samples of ceramics based on barium titanate and calcium titanate were obtained and studied. We have analyzed the elemental composition of the obtained composite. It is shown that calcium-barium titanate Ba1-xCaxTiO3 solid solution contains calcium with x < 0,3. In ceramic samples with x ≥ 0,3, an excess of CaTiO3 was recrystallized in individual grains. An increase in the concentration of calcium leads to both a decrease in the size of the samples and a decrease in its density. An increase in the grain size (by several times) of the BaTiO3 ceramics in comparison with the CaTiO3 ceramics leads to a corresponding increase in the microhardness of the samples.
Keywords: barium titanate piezoelectric ceramics, lead-free materials, grain structure
- Olga V. Malyshkina – Dr. Sc., Full Professor, Head of the Department of Dissertation Councils and Doctorate Studies, Scientific Research Department, Tver State University
- Alexandra I. Ivanova – Ph. D., Docent of the Applied Physic Department, Tver State University
- Krisnina S. Karelina – student, Tver State University
- Roman A. Petrov – student, Tver State University
Malyshkina, O.V. Structure features of barium and calcium titanate ceramics / O.V. Malyshkina, A.I. Ivanova, K.S. Karelina, R.A. Petrov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2020. — I. 12. — P. 652-661. DOI: 10.26456/pcascnn/2020.12.652. (In Russian).
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