Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method and application of pyrochlore-phase high-entropy ceramic
The invention relates to a preparation method and application of pyrochlore phase high-entropy ceramic. Weighing corresponding oxides according to the ratio of the chemical formula; taking absolute ethyl alcohol as a dispersing aid to obtain a uniformly mixed dry raw material; the preparation method comprises the following steps: pre-sintering the raw materials at 1100-1150 DEG C, and fully ball-milling and crushing the pre-sintered powder by taking ethanol as a grinding medium to obtain pre-sintered prefabricated powder; adding a polyvinyl alcohol aqueous solution into the prefabricated powder as a binder, mixing, and granulating to obtain prefabricated powder with better flowability; carrying out compression molding on the prefabricated powder, heating the molded ceramic biscuit to 600-700 DEG C, and carrying out glue removal; and then carrying out high-temperature sintering to obtain the pyrochlore phase high-entropy ceramic. The preparation method is simple and convenient to operate, short in preparation period, low in cost, uniform in microstructure and excellent in high-temperature NTC (Negative Temperature Coefficient) characteristic. The crystal grain size distribution is uniform, the NTC linear relation is stable in a high-temperature environment, and the material is applied to a temperature sensor.
本发明涉及一种烧绿石相高熵陶瓷的制备方法及应用。以化学式为的配比称量对应的氧化物；用无水乙醇作为分散助剂得到混合均匀的干燥原料；原料在1100℃‑1150℃下预烧，再将预烧后的粉料以乙醇为研磨介质进行充分球磨粉碎，得到预烧后的预制粉料；到的预制粉料中加入聚乙烯醇水溶液作为粘结剂，混合进行造粒，得到流动性较好的预制粉料；对预制粉料进行压制成型，将成型后的陶瓷素坯加热至600℃‑700℃进行排胶；再进行高温烧结，得到烧绿石相高熵陶瓷。本发明操作简便，制备周期短，成本低廉，微观结构均匀且具有优异的高温NTC特性。晶粒尺寸分布均匀，在高温环境下具有稳定的NTC线性关系，应用于温度传感器。
Preparation method and application of pyrochlore-phase high-entropy ceramic
The invention relates to a preparation method and application of pyrochlore phase high-entropy ceramic. Weighing corresponding oxides according to the ratio of the chemical formula; taking absolute ethyl alcohol as a dispersing aid to obtain a uniformly mixed dry raw material; the preparation method comprises the following steps: pre-sintering the raw materials at 1100-1150 DEG C, and fully ball-milling and crushing the pre-sintered powder by taking ethanol as a grinding medium to obtain pre-sintered prefabricated powder; adding a polyvinyl alcohol aqueous solution into the prefabricated powder as a binder, mixing, and granulating to obtain prefabricated powder with better flowability; carrying out compression molding on the prefabricated powder, heating the molded ceramic biscuit to 600-700 DEG C, and carrying out glue removal; and then carrying out high-temperature sintering to obtain the pyrochlore phase high-entropy ceramic. The preparation method is simple and convenient to operate, short in preparation period, low in cost, uniform in microstructure and excellent in high-temperature NTC (Negative Temperature Coefficient) characteristic. The crystal grain size distribution is uniform, the NTC linear relation is stable in a high-temperature environment, and the material is applied to a temperature sensor.
本发明涉及一种烧绿石相高熵陶瓷的制备方法及应用。以化学式为的配比称量对应的氧化物；用无水乙醇作为分散助剂得到混合均匀的干燥原料；原料在1100℃‑1150℃下预烧，再将预烧后的粉料以乙醇为研磨介质进行充分球磨粉碎，得到预烧后的预制粉料；到的预制粉料中加入聚乙烯醇水溶液作为粘结剂，混合进行造粒，得到流动性较好的预制粉料；对预制粉料进行压制成型，将成型后的陶瓷素坯加热至600℃‑700℃进行排胶；再进行高温烧结，得到烧绿石相高熵陶瓷。本发明操作简便，制备周期短，成本低廉，微观结构均匀且具有优异的高温NTC特性。晶粒尺寸分布均匀，在高温环境下具有稳定的NTC线性关系，应用于温度传感器。
Preparation method and application of pyrochlore-phase high-entropy ceramic
一种烧绿石相高熵陶瓷的制备方法及应用
JI HUIMING (Autor:in) / ZHENG ZHEWEI (Autor:in) / ZHANG YIWEN (Autor:in)
23.09.2022
Patent
Elektronische Ressource
Chinesisch
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