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Ceric acid rare earth-based high-entropy ceramic material and preparation method thereof
The invention discloses a cerium acid rare earth-based high-entropy ceramic material and a preparation method thereof, the cerium acid rare earth-based high-entropy ceramic material has the following chemical general formula: RE2Ce2O7, RE is selected from at least five of rare earth elements La, Nd, Sm, Eu, Gd, Dy, Ho, Yb, Tm, Lu, Sc and Y, and the mole numbers of the rare earth elements are the same. The rare earth oxide RE2O3 is adopted for doping, metal ions participating in the structure are rare earth ions with unique electronic layers, so that the rare earth oxide has good chemical properties in multiple fields, and compared with existing materials such as YSZ and lanthanum zirconate, the rare earth oxide RE2O3-doped YSZ composite material has the advantages that the performance is good; the single rare earth cerate has the characteristics of high melting point, low thermal conductivity, high thermal expansion coefficient, low heat ratio, high-temperature thermal stability and the like, and the high-entropy rare earth cerate ceramic is obtained by combining various rare earth ions, so that the heat resistance of the material is further improved, and the thermal conductivity is further reduced to 0.6 W/(m.K).
本发明公开了一种铈酸稀土基高熵陶瓷材料及其制备方法，具有以下化学通式：RE2Ce2O7，RE选自稀土元素La、Nd、Sm、Eu、Gd、Dy、Ho、Yb、Tm、Lu、Sc和Y中的至少五种，且每种稀土元素的摩尔数相同。本发明采用稀土氧化物RE2O3进行掺杂，由于参与结构的金属离子均为具有独特的电子层的稀土离子，因而使其在多领域下均表现出良好的化学性质，相对于现有的YSZ、锆酸镧之类的材料，单一铈酸稀土盐本身就具备高熔点、低热导率、高热膨胀系数、低热比及高温热稳定等特性，通过将多种稀土离子结合，得到高熵铈酸稀土陶瓷，进一步提高了材料的耐热性能，且进一步将热导率降低至0.6W/(m.K)。
Ceric acid rare earth-based high-entropy ceramic material and preparation method thereof
The invention discloses a cerium acid rare earth-based high-entropy ceramic material and a preparation method thereof, the cerium acid rare earth-based high-entropy ceramic material has the following chemical general formula: RE2Ce2O7, RE is selected from at least five of rare earth elements La, Nd, Sm, Eu, Gd, Dy, Ho, Yb, Tm, Lu, Sc and Y, and the mole numbers of the rare earth elements are the same. The rare earth oxide RE2O3 is adopted for doping, metal ions participating in the structure are rare earth ions with unique electronic layers, so that the rare earth oxide has good chemical properties in multiple fields, and compared with existing materials such as YSZ and lanthanum zirconate, the rare earth oxide RE2O3-doped YSZ composite material has the advantages that the performance is good; the single rare earth cerate has the characteristics of high melting point, low thermal conductivity, high thermal expansion coefficient, low heat ratio, high-temperature thermal stability and the like, and the high-entropy rare earth cerate ceramic is obtained by combining various rare earth ions, so that the heat resistance of the material is further improved, and the thermal conductivity is further reduced to 0.6 W/(m.K).
本发明公开了一种铈酸稀土基高熵陶瓷材料及其制备方法，具有以下化学通式：RE2Ce2O7，RE选自稀土元素La、Nd、Sm、Eu、Gd、Dy、Ho、Yb、Tm、Lu、Sc和Y中的至少五种，且每种稀土元素的摩尔数相同。本发明采用稀土氧化物RE2O3进行掺杂，由于参与结构的金属离子均为具有独特的电子层的稀土离子，因而使其在多领域下均表现出良好的化学性质，相对于现有的YSZ、锆酸镧之类的材料，单一铈酸稀土盐本身就具备高熔点、低热导率、高热膨胀系数、低热比及高温热稳定等特性，通过将多种稀土离子结合，得到高熵铈酸稀土陶瓷，进一步提高了材料的耐热性能，且进一步将热导率降低至0.6W/(m.K)。
Ceric acid rare earth-based high-entropy ceramic material and preparation method thereof
铈酸稀土基高熵陶瓷材料及其制备方法
XUE LIYAN (author) / YANG FAN (author) / ZHANG XUESONG (author) / SHAO ZHIHENG (author)
2022-07-15
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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