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Entropy-stable RE2O3-AO2-B2O5 oxide ceramic and preparation method thereof
The invention discloses entropy-stabille RE2O3-AO2-B2O5 oxide ceramic and a preparation method thereof, and the preparation method comprises the following steps: taking raw material rare earth oxides RE2O3, AO2 (A = Ti, Zr, Hf, Sn, Th and Ce) and B2O5 (B = V, Nb, Ta and P), calcining, cooling, carrying out ball milling, drying, sieving to obtain powder, carrying out spark plasma sintering, and finally carrying out heat preservation, annealing and carbon removal to obtain the compact RE2O3-AO2-B2O5 rare earth oxide ceramic which takes RE2A2O7 and RE3BO7 as matrixes and is of a fluorite type or pyrochlore type structure is obtained. The fluorite type or pyrochlore type rare earth oxide ceramic material which is high in lattice defect concentration, low in heat conductivity, high in hardness, excellent in fracture toughness, high in phase purity and high in density is prepared by regulating and controlling the stoichiometric ratio of different metal elements and through the steps of high-temperature, high-pressure and short-time sintering; and the material can be applied to the fields of thermal barrier coatings, environmental barrier coatings, solid oxide fuel cells, nuclear waste storages and the like.
本发明公开了一种熵稳定RE2O3‑AO2‑B2O5氧化物陶瓷及其制备方法，包括如下步骤：根取原料稀土氧化物RE2O3、AO2(A＝Ti,Zr,Hf,Sn,Th,Ce)、B2O5(B＝V,Nb,Ta,P)，煅烧冷却后进行球磨，然后干燥、过筛得到粉末，接着进行放电等离子烧结，最后保温退火除碳，得到致密的以RE2A2O7和RE3BO7为基体的萤石型或焦绿石型结构的RE2O3‑AO2‑B2O5稀土氧化物陶瓷。本发明通过调控不同金属元素的化学计量比以及高温、高压、短时烧结等步骤制备得到了一种晶格缺陷浓度高、热导率低、硬度高、断裂韧性优异、物相纯度高和致密度高的萤石型或焦绿石型稀土氧化物陶瓷材料，可应用于热障涂层、环境障涂层、固态氧化物燃料电池和核废料储存器等领域。
Entropy-stable RE2O3-AO2-B2O5 oxide ceramic and preparation method thereof
The invention discloses entropy-stabille RE2O3-AO2-B2O5 oxide ceramic and a preparation method thereof, and the preparation method comprises the following steps: taking raw material rare earth oxides RE2O3, AO2 (A = Ti, Zr, Hf, Sn, Th and Ce) and B2O5 (B = V, Nb, Ta and P), calcining, cooling, carrying out ball milling, drying, sieving to obtain powder, carrying out spark plasma sintering, and finally carrying out heat preservation, annealing and carbon removal to obtain the compact RE2O3-AO2-B2O5 rare earth oxide ceramic which takes RE2A2O7 and RE3BO7 as matrixes and is of a fluorite type or pyrochlore type structure is obtained. The fluorite type or pyrochlore type rare earth oxide ceramic material which is high in lattice defect concentration, low in heat conductivity, high in hardness, excellent in fracture toughness, high in phase purity and high in density is prepared by regulating and controlling the stoichiometric ratio of different metal elements and through the steps of high-temperature, high-pressure and short-time sintering; and the material can be applied to the fields of thermal barrier coatings, environmental barrier coatings, solid oxide fuel cells, nuclear waste storages and the like.
本发明公开了一种熵稳定RE2O3‑AO2‑B2O5氧化物陶瓷及其制备方法，包括如下步骤：根取原料稀土氧化物RE2O3、AO2(A＝Ti,Zr,Hf,Sn,Th,Ce)、B2O5(B＝V,Nb,Ta,P)，煅烧冷却后进行球磨，然后干燥、过筛得到粉末，接着进行放电等离子烧结，最后保温退火除碳，得到致密的以RE2A2O7和RE3BO7为基体的萤石型或焦绿石型结构的RE2O3‑AO2‑B2O5稀土氧化物陶瓷。本发明通过调控不同金属元素的化学计量比以及高温、高压、短时烧结等步骤制备得到了一种晶格缺陷浓度高、热导率低、硬度高、断裂韧性优异、物相纯度高和致密度高的萤石型或焦绿石型稀土氧化物陶瓷材料，可应用于热障涂层、环境障涂层、固态氧化物燃料电池和核废料储存器等领域。
Entropy-stable RE2O3-AO2-B2O5 oxide ceramic and preparation method thereof
一种熵稳定RE2O3-AO2-B2O5氧化物陶瓷及其制备方法
CHEN LIN (author) / FENG JING (author) / LI BAIHUI (author) / ZHANG LUYANG (author) / WANG JIANKUN (author)
2021-09-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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