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High temperature stable monoclinic phase-free tetragonal zirconia thermal barrier coating material and preparation method thereof
The invention discloses a high temperature stable monoclinic phase-free tetragonal zirconia thermal barrier coating material (Zr0.76Ce0.16Gd0.08)O1.96 and a preparation method thereof. According to the preparation method, Ce(NO3)3.6H2O, Gd(NO3)3.6H2O, and Zr(NO3)4.3H2O with a purity of 99.99% are taken as raw materials; a mixture is prepared at a Zr4+:Ce3+:Gd3+ molar ratio of 0.76:0.16:0.08; an aqueous solution with a certain concentration is prepared by taking deionized water as a solvent; appropriate amounts of citric acid and polyethylene glycol are added, and an obtained mixed solution is subjected to magnetic stirring to be clear and transparent; purified air with a pressure of 0.3MPa is taken as an atomizing medium, and is delivered into a corundum crucible with a temperature of 500 DEG C via atomizing; after atomizing, the temperature is increased to 1200 DEG C for 6h of calcining so as to obtain the pure tetragonal zirconia raw material. High temperature phase stability of the high temperature stable monoclinic phase-free tetragonal zirconia thermal barrier coating material is excellent, no monoclinic phase tetragonal zirconia is generated after 80h of calcining at 1500 DEG C, tetragonal phase content is 48mol%, the preparation method is high in phase purity and low in temperature, and the preparation method is simple.
High temperature stable monoclinic phase-free tetragonal zirconia thermal barrier coating material and preparation method thereof
The invention discloses a high temperature stable monoclinic phase-free tetragonal zirconia thermal barrier coating material (Zr0.76Ce0.16Gd0.08)O1.96 and a preparation method thereof. According to the preparation method, Ce(NO3)3.6H2O, Gd(NO3)3.6H2O, and Zr(NO3)4.3H2O with a purity of 99.99% are taken as raw materials; a mixture is prepared at a Zr4+:Ce3+:Gd3+ molar ratio of 0.76:0.16:0.08; an aqueous solution with a certain concentration is prepared by taking deionized water as a solvent; appropriate amounts of citric acid and polyethylene glycol are added, and an obtained mixed solution is subjected to magnetic stirring to be clear and transparent; purified air with a pressure of 0.3MPa is taken as an atomizing medium, and is delivered into a corundum crucible with a temperature of 500 DEG C via atomizing; after atomizing, the temperature is increased to 1200 DEG C for 6h of calcining so as to obtain the pure tetragonal zirconia raw material. High temperature phase stability of the high temperature stable monoclinic phase-free tetragonal zirconia thermal barrier coating material is excellent, no monoclinic phase tetragonal zirconia is generated after 80h of calcining at 1500 DEG C, tetragonal phase content is 48mol%, the preparation method is high in phase purity and low in temperature, and the preparation method is simple.
High temperature stable monoclinic phase-free tetragonal zirconia thermal barrier coating material and preparation method thereof
JIANG KUO (author) / LIU SONGBAI (author) / ZHAO LILIN (author)
2016-01-13
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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