Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
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Cerium-zirconium composite rare earth-based high-entropy ceramic material and preparation method thereof
The invention discloses a cerium-zirconium composite rare earth-based high-entropy ceramic material and a preparation method thereof, the cerium-zirconium composite rare earth-based high-entropy ceramic material has the following chemical general formula: RE2 (Zr0. 5Ce0. 5) 2O7, 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. According to the cerium-zirconium composite rare earth-based high-entropy ceramic and the preparation method thereof, cerium acid and zirconic acid rare earth are subjected to high-entropy design, rare earth oxide RE2O3 is adopted for doping, the cerium-zirconium composite rare earth-based high-entropy ceramic is obtained by combining multiple rare earth ions, and metal ions participating in the structure are rare earth ions with unique electronic layers, so that the cerium-zirconium composite rare earth-based high-entropy ceramic shows good chemical properties in multiple fields; the thermal conductivity is further reduced, the heat resistance is improved, the minimum normal-temperature thermal conductivity is reduced to 0.8 W/(m.K), the thermal expansion coefficient is relatively large, and the material is very suitable for being used as a thermal barrier coating material.
本发明公开了一种铈锆复合稀土基高熵陶瓷材料及其制备方法，具有以下化学通式：RE2(Zr0.5Ce0.5)2O7，其中，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。本发明将铈酸和锆酸稀土进行高熵化设计，丙采用稀土氧化物RE2O3掺杂，通过将多种稀土离子结合得到铈锆复合稀土基高熵陶瓷，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，因而在多领域下均表现出良好的化学性质，进一步降低了其热导率，提高了耐热性能，常温热导率最低降至0.8W/(m.K)，且热膨胀系数相对较大，非常适于作为热障涂层材料。
Cerium-zirconium composite rare earth-based high-entropy ceramic material and preparation method thereof
The invention discloses a cerium-zirconium composite rare earth-based high-entropy ceramic material and a preparation method thereof, the cerium-zirconium composite rare earth-based high-entropy ceramic material has the following chemical general formula: RE2 (Zr0. 5Ce0. 5) 2O7, 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. According to the cerium-zirconium composite rare earth-based high-entropy ceramic and the preparation method thereof, cerium acid and zirconic acid rare earth are subjected to high-entropy design, rare earth oxide RE2O3 is adopted for doping, the cerium-zirconium composite rare earth-based high-entropy ceramic is obtained by combining multiple rare earth ions, and metal ions participating in the structure are rare earth ions with unique electronic layers, so that the cerium-zirconium composite rare earth-based high-entropy ceramic shows good chemical properties in multiple fields; the thermal conductivity is further reduced, the heat resistance is improved, the minimum normal-temperature thermal conductivity is reduced to 0.8 W/(m.K), the thermal expansion coefficient is relatively large, and the material is very suitable for being used as a thermal barrier coating material.
本发明公开了一种铈锆复合稀土基高熵陶瓷材料及其制备方法，具有以下化学通式：RE2(Zr0.5Ce0.5)2O7，其中，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。本发明将铈酸和锆酸稀土进行高熵化设计，丙采用稀土氧化物RE2O3掺杂，通过将多种稀土离子结合得到铈锆复合稀土基高熵陶瓷，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，因而在多领域下均表现出良好的化学性质，进一步降低了其热导率，提高了耐热性能，常温热导率最低降至0.8W/(m.K)，且热膨胀系数相对较大，非常适于作为热障涂层材料。
Cerium-zirconium composite rare earth-based high-entropy ceramic material and preparation method thereof
一种铈锆复合稀土基高熵陶瓷材料及其制备方法
ZHANG XUESONG (Autor:in) / YANG FAN (Autor:in) / XUE LIYAN (Autor:in) / ZHAO ZHIGANG (Autor:in) / SHAO ZHIHENG (Autor:in)
29.07.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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