Optimization of technology for producing a composite based on barium ferrite and barium titanate
O.V. Malyshkina, G.S. Shishkov, A.I. Ivanova
Tver State University
Abstract: It is shown in the work that as a result of sintering of composite samples of barium titanate (80 vol. %) – barium ferrite ( 20 vol. %) in a porcelain crucible at a temperature of 1300 °C, a eutectic appears. As a result of comparing the properties of the samples obtained at different sintering temperatures, it was found that the samples sintered at 1250 °C have optimal properties. The structure and dielectric properties of barium titanate ceramic samples and barium titanate (80 vol. %) – barium ferrite ( 20 vol. %) composite sintered at a temperature of 1250 °C are compared. It has been shown that the addition of 20% barium ferrite to the composition of barium titanate increases the dielectric constant, pyroelectric coefficient, and piezoelectric modulus d33 of the composite of 1,5–2 times compared to barium titanate ceramics, while the value of the piezoelectric modulus d31 remains unchanged. The introduction of 20 % barium ferrite into the barium titanate ceramics is sufficient for the resulting composite to have magnetic characteristics corresponding to pure barium ferrite.
Keywords: multiferroic, barium ferrite, barium titanate, magneto-electric composite, piezoelectric ceramic structure
- Olga V. Malyshkina – Dr. Sc., Full Professor, Head of the Department of Dissertation Councils and Doctorate Studies, Scientific Research Department, Tver State University
- Gregori S. Shishkov – 3rd year postgraduate student, Tver State University
- Alexandra I. Ivanova – Ph. D., Docent, Applied Physic Department, Tver State University
Malyshkina, O.V. Optimization of technology for producing a composite based on barium ferrite and barium titanate / O.V. Malyshkina, G.S. Shishkov, A.I. Ivanova // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2021. — I. 13. — P. 740-749. DOI: 10.26456/pcascnn/2021.13.740. (In Russian).
Full article (in Russian): download PDF file
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