Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Calcium-manganese-oxygen thermoelectric material and preparation method thereof
The invention discloses a calcium-manganese-oxygen thermoelectric material and a preparation method thereof, and the thermoelectric material is characterized in that cubic-phase CaMnO3 is used as a matrix phase, lamellar CaO is used as an embedded phase, the embedded phase is dispersed in the matrix phase and is directionally arranged, and a tetragonal perovskite symbiotic structure CaO (CaMnO3) m is formed; the preparation method comprises the following steps: uniformly mixing CaO and MnO2, and then carrying out high-temperature sintering; the mixture subjected to high-temperature sintering is subjected to ball milling, powder is formed, the ball milling mass ratio is (10-30): 1, the ball milling time is 0.5-4 h, and the diameter of the powder reaches 30-1000 nm; collecting powder, and carrying out hot pressing treatment on the powder under inert gas; calcium oxide and manganese oxide are used as raw materials, ball milling and hot pressing are performed to form the tetragonal perovskite symbiotic structure CaO (CaMnO3) m, so that the Seebeck coefficient of the thermoelectric material is improved, the ball milling mass ratio and the ball milling time are controlled, the heat conductivity is reduced, the thermoelectric conversion efficiency of the thermoelectric material is optimized, the cost is reduced, and industrial production is facilitated.
本发明公开了一种钙锰氧热电材料及其制备方法，热电材料，以立方相CaMnO3作为基体相，以片层状CaO作为嵌入相，嵌入相弥散在基体相中定向排列，形成四方钙钛矿共生型结构CaO(CaMnO3)m；制备方法，包括以下步骤：取CaO和MnO2均匀混合，然后进行高温烧结；将经过高温烧结的混合物进行球磨，形成粉末，其中，球磨质量比为10‑30：1，球磨时间为0.5‑4h，以使粉末径达30‑1000nm；收集粉末，在惰性气体下对粉末进行热压处理；本发明以氧化钙、氧化锰为原料，通过球磨、热压，形成四方钙钛矿共生型结构CaO(CaMnO3)m，从而提高热电材料的塞贝克系数，并且控制球磨质量比、球磨时间，从而降低热导率，以此优化热电材料的热电转换效率，降低成本、利于工业生产。
Calcium-manganese-oxygen thermoelectric material and preparation method thereof
The invention discloses a calcium-manganese-oxygen thermoelectric material and a preparation method thereof, and the thermoelectric material is characterized in that cubic-phase CaMnO3 is used as a matrix phase, lamellar CaO is used as an embedded phase, the embedded phase is dispersed in the matrix phase and is directionally arranged, and a tetragonal perovskite symbiotic structure CaO (CaMnO3) m is formed; the preparation method comprises the following steps: uniformly mixing CaO and MnO2, and then carrying out high-temperature sintering; the mixture subjected to high-temperature sintering is subjected to ball milling, powder is formed, the ball milling mass ratio is (10-30): 1, the ball milling time is 0.5-4 h, and the diameter of the powder reaches 30-1000 nm; collecting powder, and carrying out hot pressing treatment on the powder under inert gas; calcium oxide and manganese oxide are used as raw materials, ball milling and hot pressing are performed to form the tetragonal perovskite symbiotic structure CaO (CaMnO3) m, so that the Seebeck coefficient of the thermoelectric material is improved, the ball milling mass ratio and the ball milling time are controlled, the heat conductivity is reduced, the thermoelectric conversion efficiency of the thermoelectric material is optimized, the cost is reduced, and industrial production is facilitated.
本发明公开了一种钙锰氧热电材料及其制备方法，热电材料，以立方相CaMnO3作为基体相，以片层状CaO作为嵌入相，嵌入相弥散在基体相中定向排列，形成四方钙钛矿共生型结构CaO(CaMnO3)m；制备方法，包括以下步骤：取CaO和MnO2均匀混合，然后进行高温烧结；将经过高温烧结的混合物进行球磨，形成粉末，其中，球磨质量比为10‑30：1，球磨时间为0.5‑4h，以使粉末径达30‑1000nm；收集粉末，在惰性气体下对粉末进行热压处理；本发明以氧化钙、氧化锰为原料，通过球磨、热压，形成四方钙钛矿共生型结构CaO(CaMnO3)m，从而提高热电材料的塞贝克系数，并且控制球磨质量比、球磨时间，从而降低热导率，以此优化热电材料的热电转换效率，降低成本、利于工业生产。
Calcium-manganese-oxygen thermoelectric material and preparation method thereof
钙锰氧热电材料及其制备方法
SHI YIXUAN (Autor:in) / TANG TAO (Autor:in)
24.06.2022
Patent
Elektronische Ressource
Chinesisch
Thermoelectric ceramic material and preparation method thereof
| Europäisches Patentamt | 2022
| Europäisches Patentamt | 2018
Preparation method of lanthanum-calcium-manganese-oxygen low-doped samarium nitrate
| Europäisches Patentamt | 2020
| Europäisches Patentamt | 2023
Thermoelectric nano composite material and preparation method thereof
| Europäisches Patentamt | 2022