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Information × Registration Number 0225U001279, (0123U104090) , R & D reports Title Mastering the improved technology of zirconia products of the Z90 group (stabilized by ~ 10 % Y2O3 with Al2O3 additive) with increased thermal shock resistance at service temperatures up to 2100 °C and pilot batches output of zirconia products for induction units popup.stage_title Освоєння удосконаленої технології цирконійоксидних виробів групи Z90 (стабілізованих ~ 10 % Y2О3 з добавкою Аl2О3) з підвищеною термостійкістю за температури служби до 2100 °С і випуск дослідних партій цирконійоксидних виробів для індукційних установок Head Halchenko Tetiana H., к.т.н. Registration Date 29-01-2025 Organization Joint Stock Company "The Ukrainian Research Institute of Refractories named after A. S. Berezhnoy" popup.description1 Mastering the improved technology of zirconia products of the Z90 group (stabilized by ~ 10 % Y2O3 with Al2O3 additive) with increased thermal shock resistance at service temperatures up to 2100 °C popup.description2  The research object is zirconium oxide products. The purpose is to develop an improved technology of zirconia products of the Z90 group (stabilized by ~10 % Y2O3 and with Аl2О3 additive) with increased thermal shock resistance at a service temperature of up to 2100 °C. Research methods are chemical, physical-mechanical, petrographic, and X-ray diffraction. Additional studies of the properties (microstructure, phase composition, refractoriness) of zirconia products at service temperatures up to 2100 °C were performed. It was established that the introduction of Аl2О3 additive contributes to the formation of a fine-crystalline, fine-porous microstructure of this refractory, the phase composition of which is represented by high-temperature phases of a solid solution of Y2O3 in ZrO2 and corundum. The refractoriness of this refractory was determined to be 2420 ºС. The studies conducted give grounds to recommend using refractories of this composition in high-temperature installations at a service temperature of up to 2100 ºС under possible temperature fluctuations. As a result of the work carried out, an improved technology of zirconia products of the Z90 group (stabilized by ~10 % Y2O3 and with Аl2О3 additive) was mastered during the production of a pilot batch, which ensures their manufacture with a thermal shock resistance which is more than 3.5 times higher in comparison with the currently manufactured products. This will ensure the prolonged service life of zirconium oxide refractories in high-temperature installations at consumers' facilities. By the terms of the contract concluded with the customer, JSC “URIR named after A.S. Berezhnoy” manufactured a pilot batch of vibro-cast zirconium oxide crucibles with properties that meet the Buyer's requirements. The manufactured products were supplied to the domestic market. Work is ongoing to further improve the technology of zirconium oxide products, and expand their production and use. Product Description popup.authors popup.nrat_date 2025-01-29 Close