Technological methods for reducing the sintering temperature of ceramics based on the BZN cubic pyrochlore system

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Abstract

For the first time, ceramics of the Bi2O3-ZnO-Nb2O5 system with high density, homogeneous microstructure and high dielectric parameters (higher by 30% in comparison with traditional ceramic technologies) were obtained by spark plasma sintering. The mechanisms of ceramic frame formation have been studied and technological modes of sintering have been optimized.

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About the authors

М. А. Marakhovskiy

Institute of High Technologies and Piezotechnics, Southern Federal University

Author for correspondence.
Email: marmisha@mail.ru
Russian Federation, Rostov-on-Don

М. V. Talanov

Moscow Institute of Physics and Technology (National Research University)

Email: marmisha@mail.ru
Russian Federation, Moscow

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2. Fig. 1. Powder X-ray diffraction patterns of the studied samples obtained by different sintering methods.

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3. Fig. 2. Images of the microstructure of ceramic samples sintered by different methods: SPS at Tsinter = 850 °C (a), 870 °C (b), 900 °C (c), 930 °C (d) and 950 °C (d) and ATM at Tsinter = 1000 °C (e).

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4. Fig. 3. Images of the microstructure of ceramic samples sintered by the SPS method at a temperature of 950 °C with different isothermal holding times: 0 min (a), 0.5 min (b), 1 min (c).

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