Steklo i Keramika (Glass and Ceramics). Monthly scientific, technical and industrial journal

 

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Anomalous thermal expansion in solid-state synthesis of pie-zoceramics based on sodium and potassium niobate solid solu-tions

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Autors: Ponomarev S. G., Tarasovskiy V. P., Rybal?chenko V. V., Koshkin V. I., Vasin A. A., Smirnov D. A.
  • Continuous numbering: 1080
  • Pages: 21-24
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Heading: Science for ceramic production

During solid-phase synthesis of piezoceramic materials based on complex oxides with a perovskite structure, anomalous thermal expansion of the pressed mixture of the initial reaction components is observed. Under certain conditions, the magnitude of this expansion can be an indicator of the degree of progress of solid-phase reactions. The analysis of the thermal expansion of a compressed mixture of powders of potassium, sodium and niobium carbonates during the synthesis of complex oxide of potassium and sodium niobate KNN is carried out. It is shown that on the basis of this analysis it is possible to estimate the temperature and completeness of the synthesis reaction. Several schemes for the solid-phase synthesis of this material are considered. From the material obtained, samples of piezoceramics with a density of up to 92 & # 37; from theoretical and value of piezomodulus d 33 to 1.010 -10 C / N
Yaffe B., Cook U., Yaffe G. Piezoelectric ceramics. Moscow: Mir, 1974.288 p. Directive 2002/95 / EC of the european parliament and of the council of 27 January 2003 // Official Journal of the European Union. 2003. V. 37. No. 19. Saito Y., Takao H., Tani T. et al. Lead-free piezoceramics // Nature. 2004. V. 432. P. 84? 87. Li J.-F., Wang K., Zhu F.-Y. et al. (K, Na) NbO3-based lead-free piezoceramics: Fundamental aspects, processing technologies, and remaining challenges // J. Am. Ceram. Soc. 2013. V. 96. P. 3677? 3696. Wang X., Wu J., Xiao D., Zhu J. Giant piezoelectricity in potassium-sodium Niobate lead-free ceramics // J. Am. Chem. Soc. 2014. V. 136. P. 2905? 2910. Segalla AG, Belov VV, Golovnin VA Anomalous thermal expansion during solid-phase synthesis of complex oxide compounds // Tr. Int. scientific-practical conf. "Piezotechnics-99". T. 1. Rostov-on-Don, 1999.S. 153? 165. Verbenko IA, Razumovskaya ON, Shilkina LA et al. Obtaining and dielectric properties of lead-free ceramics of composition [(Na0.5K0.5) 1? xLix] (Nb1-y-zTaySbz) O3 // Inorgan. materials. 2009. T. 45.? 6.S. 762? 768. Farooq MU, Fisher JG, Kim J. et al. Zhang Reactive sintering of lead-free piezoelectric (K0.5Na0.5) NbO3 ceramics // Journal of Ceramic Processing Research. 2016. V. 17. N 4. R. 304? 312.

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Keywords

piezoceramic material, solid phase synthesis, potassium and sodium niobates, abnormal thermal expansion

Use the reference below to cite the publication

Ponomarev S. G., Tarasovskiy V. P., Rybal?chenko V. V., Koshkin V. I., Vasin A. A., Smirnov D. A. Anomalous thermal expansion in solid-state synthesis of pie-zoceramics based on sodium and potassium niobate solid solu-tions. Steklo i keramika. 2017:90(12):21-24. (in Russ). UDK 620.22:537.226:546.05
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Lyudmila Vladimirovna Sokolova