Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-entropy rare earth titanate ceramic coating material and preparation method thereof
The invention relates to a high-entropy rare earth titanate 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 (La < 0.3 > K < 0.1 > Ca < 0.2 > Sr < 0.2 > Ba < 0.2 >) TiO < 3 + delta >. The preparation method comprises the following steps: carrying out wet ball milling on raw material powder, uniformly mixing to form slurry, drying, heating to 900-1000 DEG C, pre-calcining for 2-3 hours at a constant temperature, cooling along with a furnace, heating to 1300-1400 DEG C, calcining for 10-15 hours at a constant temperature, and cooling to obtain the coating material. According to the coating material, the ideal novel high-entropy rare earth titanate ceramic coating material is successfully prepared by designing and adding doping elements and adjusting technological parameters, the crystal structure, the microstructure and the oxygen vacancy defect concentration of the coating material are changed, the compactness of the coating block material is larger than 98.4%, the Vickers hardness ranges from 10 GPa to 12 GPa, and the hardness ranges from 10 GPa to 12 GPa. The heat conductivity is 1.39 W.m <-1 >. K <-1 > to 1.75 W.m <-1 >. K <-1 >; 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钛酸盐陶瓷涂层材料及其制备方法，属于高熵陶瓷材料技术领域。所述涂层材料的物相组成为(La0.3K0.1Ca0.2Sr0.2Ba0.2)TiO3+δ。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，干燥后升温至900℃～1000℃恒温预煅烧2h～3h，随炉冷却，再升温至1300℃～1400℃恒温煅烧10h～15h，然后降温冷却，制得所述涂层材料。所述涂层材料通过掺杂元素的设计添加并通过调整工艺参数成功制备了理想的新型高熵稀土钛酸盐陶瓷涂层材料，使其晶体结构、微观组织以及氧空位缺陷浓度发生改变，使所述涂层块体材料致密度大于98.4％，维氏硬度为10GPa～12GPa，热导率为1.39W·m‑1·k‑1～1.75W·m‑1·k‑1；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 titanate ceramic coating material and preparation method thereof
The invention relates to a high-entropy rare earth titanate 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 (La < 0.3 > K < 0.1 > Ca < 0.2 > Sr < 0.2 > Ba < 0.2 >) TiO < 3 + delta >. The preparation method comprises the following steps: carrying out wet ball milling on raw material powder, uniformly mixing to form slurry, drying, heating to 900-1000 DEG C, pre-calcining for 2-3 hours at a constant temperature, cooling along with a furnace, heating to 1300-1400 DEG C, calcining for 10-15 hours at a constant temperature, and cooling to obtain the coating material. According to the coating material, the ideal novel high-entropy rare earth titanate ceramic coating material is successfully prepared by designing and adding doping elements and adjusting technological parameters, the crystal structure, the microstructure and the oxygen vacancy defect concentration of the coating material are changed, the compactness of the coating block material is larger than 98.4%, the Vickers hardness ranges from 10 GPa to 12 GPa, and the hardness ranges from 10 GPa to 12 GPa. The heat conductivity is 1.39 W.m <-1 >. K <-1 > to 1.75 W.m <-1 >. K <-1 >; 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钛酸盐陶瓷涂层材料及其制备方法，属于高熵陶瓷材料技术领域。所述涂层材料的物相组成为(La0.3K0.1Ca0.2Sr0.2Ba0.2)TiO3+δ。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，干燥后升温至900℃～1000℃恒温预煅烧2h～3h，随炉冷却，再升温至1300℃～1400℃恒温煅烧10h～15h，然后降温冷却，制得所述涂层材料。所述涂层材料通过掺杂元素的设计添加并通过调整工艺参数成功制备了理想的新型高熵稀土钛酸盐陶瓷涂层材料，使其晶体结构、微观组织以及氧空位缺陷浓度发生改变，使所述涂层块体材料致密度大于98.4％，维氏硬度为10GPa～12GPa，热导率为1.39W·m‑1·k‑1～1.75W·m‑1·k‑1；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 titanate ceramic coating material and preparation method thereof
一种高熵稀土钛酸盐陶瓷涂层材料及其制备方法
GAO CHANG (Autor:in) / ZHU JINPENG (Autor:in) / YANG KAIJUN (Autor:in) / ZHANG YANING (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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