Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-entropy rare earth tantalate ceramic coating material and preparation method thereof
The invention relates to a high-entropy rare earth tantalate ceramic coating material and a preparation method thereof, and belongs to the technical field of high-entropy ceramic materials. The phase composition of the coating material is (Nd < 0.2 > Dy < 0.2 > Ho < 0.2 > Y < 0.2 > Er < 0.2 >) TaO < 4 >. The preparation method comprises the following steps: carrying out wet ball milling on raw material powder, uniformly mixing to form slurry, drying to obtain powder, heating the powder to 1450-1550 DEG C, and carrying out constant-temperature calcination for 8-10 hours to obtain the coating material. According to the coating material, five rare earth oxides and Ta2O5 are subjected to solid solution to form a single-phase compound with a monoclinic crystal structure, and the thermal conductivity of rare earth tantalate is remarkably improved due to the high-entropy lattice distortion effect, so that the coating material has excellent thermal physical properties, has low thermal conductivity of 1.41 W.m <-1 >. K <-1 > and a thermal expansion coefficient of 10.5 * 10 <-6 > K <-1 >, and can be applied to the field of thermal engineering. The material has excellent thermal stability, can be used as a candidate material of TPC, and has a wide application scene in the field of thermal protection coatings of key high-end equipment; the process flow for preparing the coating material by adopting a high-temperature solid-phase reaction method is simple, the preparation cost is relatively low, and the popularization is easy.
本发明涉及一种高熵稀土钽酸盐陶瓷涂层材料及制备方法，属于高熵陶瓷材料技术领域。所述涂层材料的物相组成为(Nd0.2Dy0.2Ho0.2Y0.2Er0.2)TaO4。所述制备方法通过将原料粉体湿法球磨混合均匀，形成浆料，干燥后得到的粉体升温至1450℃～1550℃恒温煅烧8h～10h，制得所述涂层材料。所述涂层材料通过将五种稀土氧化物与Ta2O5固溶，形成具有单斜晶体结构的单相化合物，由于高熵化的晶格畸变效应显著改善了稀土钽酸盐的热导率，因此所述涂层材料具有优异热物理性能，具有1.41W·m‑1·K‑1的低热导率，10.5×10‑6K‑1的热膨胀系数，并具有优异的热稳定性，可以作为TPC的候选材料，在关键高端装备热防护涂层领域具有广泛的应用场景；采用高温固相反应法制备所述涂层材料的工艺流程简洁，制备成本较低，易于推广。
High-entropy rare earth tantalate ceramic coating material and preparation method thereof
The invention relates to a high-entropy rare earth tantalate ceramic coating material and a preparation method thereof, and belongs to the technical field of high-entropy ceramic materials. The phase composition of the coating material is (Nd < 0.2 > Dy < 0.2 > Ho < 0.2 > Y < 0.2 > Er < 0.2 >) TaO < 4 >. The preparation method comprises the following steps: carrying out wet ball milling on raw material powder, uniformly mixing to form slurry, drying to obtain powder, heating the powder to 1450-1550 DEG C, and carrying out constant-temperature calcination for 8-10 hours to obtain the coating material. According to the coating material, five rare earth oxides and Ta2O5 are subjected to solid solution to form a single-phase compound with a monoclinic crystal structure, and the thermal conductivity of rare earth tantalate is remarkably improved due to the high-entropy lattice distortion effect, so that the coating material has excellent thermal physical properties, has low thermal conductivity of 1.41 W.m <-1 >. K <-1 > and a thermal expansion coefficient of 10.5 * 10 <-6 > K <-1 >, and can be applied to the field of thermal engineering. The material has excellent thermal stability, can be used as a candidate material of TPC, and has a wide application scene in the field of thermal protection coatings of key high-end equipment; the process flow for preparing the coating material by adopting a high-temperature solid-phase reaction method is simple, the preparation cost is relatively low, and the popularization is easy.
本发明涉及一种高熵稀土钽酸盐陶瓷涂层材料及制备方法，属于高熵陶瓷材料技术领域。所述涂层材料的物相组成为(Nd0.2Dy0.2Ho0.2Y0.2Er0.2)TaO4。所述制备方法通过将原料粉体湿法球磨混合均匀，形成浆料，干燥后得到的粉体升温至1450℃～1550℃恒温煅烧8h～10h，制得所述涂层材料。所述涂层材料通过将五种稀土氧化物与Ta2O5固溶，形成具有单斜晶体结构的单相化合物，由于高熵化的晶格畸变效应显著改善了稀土钽酸盐的热导率，因此所述涂层材料具有优异热物理性能，具有1.41W·m‑1·K‑1的低热导率，10.5×10‑6K‑1的热膨胀系数，并具有优异的热稳定性，可以作为TPC的候选材料，在关键高端装备热防护涂层领域具有广泛的应用场景；采用高温固相反应法制备所述涂层材料的工艺流程简洁，制备成本较低，易于推广。
High-entropy rare earth tantalate ceramic coating material and preparation method thereof
一种高熵稀土钽酸盐陶瓷涂层材料及制备方法
ZHANG YANING (Autor:in) / ZHU JINPENG (Autor:in) / YANG KAIJUN (Autor:in) / TIAN JINYU (Autor:in) / WANG HAILONG (Autor:in) / HE JILIN (Autor:in)
12.01.2024
Patent
Elektronische Ressource
Chinesisch
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