Production of barium-calcium-strontium niobate ceramics with optimal properties for practical application
I.L. Kislova, O.V. Malyshkina, P.A. Ivanova, A.I. Ivanova
Tver State University
Abstract: In this work, we obtained at various sintering temperatures and studied the ceramic samples of a 3-component system of barium niobate – calcium – strontium (Ca0,28Ba0,72)0,25(Sr0,61Ba0,39)0,75Nb2O6 (CSBN25) which is a nanostructured solid solution. The effect of sintering temperature on the structure and dielectric properties of CSBN25 ceramics was studied. It has been established that the CSBN25 sample obtained at a sintering temperature of 1300°С has the optimal ferroelectric properties. For this sample, the pore size does not exceed 10 – 100 nm, while for samples sintered at other temperatures, pores can reach 10 microns. Using examples of CSBN25 ceramics, we have also shown a direct relationship between the uniformity of the grain structure and their packing density with the dielectric properties of the samples: the maximum density and the value of the permittivity have the samples that have a dense, uniform grain structure not only on the surface, but also in the bulk of the samples. Increasing the sintering temperature of CSBN25 ceramics to1350°С leads to the appearance of an amorphous state in the sample bulk and, as a result, to a decrease in the dielectric constant.
Keywords: piezoelectric ceramics, barium – calcium – strontium niobate, lead-free materials, grain structure, permittivity
- Inna L. Kislova – Ph. D., Docent, Condensed Matter Physics Department, Tver State University
- Olga V. Malyshkina – Dr. Sc., Professor, Full Professor, Department of Computer Security and Mathematical Control Methods, Tver State University
- Polina A. Ivanova – 3rd year student, Faculty of Physics and Technology, Tver State University
- Alexandra I. Ivanova – Ph. D., Docent, Applied Physic Department, Tver State University
Kislova, I.L. Production of barium-calcium-strontium niobate ceramics with optimal properties for practical application / I.L. Kislova, O.V. Malyshkina, P.A. Ivanova, A.I. Ivanova // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2023. — I. 15. — P. 736-745. DOI: 10.26456/pcascnn/2023.15.736. (In Russian).
Full article (in Russian): download PDF file
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