OPTIMIZATION OF TECHNOLOGY FOR PRODUCING A COMPOSITE BASED ON BARIUM FERRITE AND BARIUM TITANATE

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.