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Titanium-doped lanthanum hafnate ceramic for thermal/environmental barrier coating with low thermal expansion and preparation method of titanium-doped lanthanum hafnate ceramic
The invention provides low-thermal-expansion titanium-doped lanthanum hafnate ceramic for a thermal/environmental barrier coating and a preparation method of the low-thermal-expansion titanium-doped lanthanum hafnate ceramic. The preparation method comprises the following steps: dissolving lanthanum trioxide powder, hafnium oxide powder and titanium dioxide powder in absolute ethyl alcohol, carrying out ball milling to obtain mixed slurry, drying the mixed slurry to obtain mixed precursor powder, and reacting the mixed precursor powder in a high-temperature air atmosphere to obtain La2 (Hf1-xTix) 2O7 ceramic powder with the molar fraction of 0 lt; and x is less than or equal to 0.2. The material for the coating has a lower thermal expansion coefficient, is more matched with a ceramic-based composite material matrix, is simple in preparation process, is lower in cost, is higher in product purity, and has a wide application prospect.
本发明提供了一种低热膨胀的热/环境障涂层用钛掺杂铪酸镧陶瓷及其制备方法。制备方法包括先将三氧化二镧粉末、二氧化铪粉末与二氧化钛粉末溶于无水乙醇并球磨，得到混合浆料，将混合浆料干燥，得到混合前驱体粉末，将混合前驱体粉末高温空气气氛中进行反应，得到La2(Hf1‑xTix)2O7陶瓷粉末，其中摩尔分数0
Titanium-doped lanthanum hafnate ceramic for thermal/environmental barrier coating with low thermal expansion and preparation method of titanium-doped lanthanum hafnate ceramic
The invention provides low-thermal-expansion titanium-doped lanthanum hafnate ceramic for a thermal/environmental barrier coating and a preparation method of the low-thermal-expansion titanium-doped lanthanum hafnate ceramic. The preparation method comprises the following steps: dissolving lanthanum trioxide powder, hafnium oxide powder and titanium dioxide powder in absolute ethyl alcohol, carrying out ball milling to obtain mixed slurry, drying the mixed slurry to obtain mixed precursor powder, and reacting the mixed precursor powder in a high-temperature air atmosphere to obtain La2 (Hf1-xTix) 2O7 ceramic powder with the molar fraction of 0 lt; and x is less than or equal to 0.2. The material for the coating has a lower thermal expansion coefficient, is more matched with a ceramic-based composite material matrix, is simple in preparation process, is lower in cost, is higher in product purity, and has a wide application prospect.
本发明提供了一种低热膨胀的热/环境障涂层用钛掺杂铪酸镧陶瓷及其制备方法。制备方法包括先将三氧化二镧粉末、二氧化铪粉末与二氧化钛粉末溶于无水乙醇并球磨，得到混合浆料，将混合浆料干燥，得到混合前驱体粉末，将混合前驱体粉末高温空气气氛中进行反应，得到La2(Hf1‑xTix)2O7陶瓷粉末，其中摩尔分数0
Titanium-doped lanthanum hafnate ceramic for thermal/environmental barrier coating with low thermal expansion and preparation method of titanium-doped lanthanum hafnate ceramic
一种低热膨胀的热/环境障涂层用钛掺杂铪酸镧陶瓷及其制备方法
WANG YANFEI (author) / DU JINPING (author) / LIU RONGJUN (author) / WAN FAN (author) / LI DUAN (author) / LI JUNSHENG (author)
2022-04-15
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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