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High-entropy ceramic material for preparing heat-stable NTC (Negative Temperature Coefficient) thermistor and preparation method of high-entropy ceramic material
The invention discloses a high-entropy ceramic material for preparing a heat-stable NTC (Negative Temperature Coefficient) thermistor and a preparation method of the high-entropy ceramic material. The molecular formula of the high-entropy ceramic material is FexCoyNizCuwMn (3-x-y-z-w) O4, wherein 0.4 < = x < = 0.8, 0.4 < = y < = 0.8, 0.4 < = z < = 0.8, and 0.4 < = w < = 0.8; the preparation method comprises the following steps: preparing a metal oxide powder material according to a stoichiometric ratio; the preparation method comprises the following steps: carrying out ball milling and pre-sintering on metal oxide powder to obtain powder with reaction activity; carrying out ball milling and drying on the pre-sintered powder, and molding into a block ingot; compacting the block ingot in a cold isostatic press, and demolding to obtain a biscuit; and the biscuit is placed in a muffle furnace to be subjected to densification sintering according to a preset sintering curve, and the NTC thermistor is subsequently prepared. The prepared NTC thermistor is uniform in component, good in thermal stability and excellent in aging performance, and the resistance drift rate is within the application range.
本发明公开了一种用于制备热稳定型NTC热敏电阻的高熵陶瓷材料及制备方法，高熵陶瓷材料的分子式为FexCoyNizCuwMn(3‑x‑y‑z‑w)O4；其中，0.4≤x≤0.8，0.4≤y≤0.8，0.4≤z≤0.8，0.4≤w≤0.8；该制备方法，包括：按照化学计量比配置金属氧化物粉体材料；将金属氧化物粉体进行球磨、预烧，得到具备反应活性的粉料；将预烧粉料进行球磨并烘干，并成型为块锭；将块锭置于冷等静压机中压实，脱模得到素坯；将素坯置于马弗炉中以预设烧结曲线进行致密化烧结，进行后续制得NTC热敏电阻。本发明所制得的NTC热敏电阻组分均匀，热稳定性好，老化性能优异，阻值漂移率在应用范围内。
High-entropy ceramic material for preparing heat-stable NTC (Negative Temperature Coefficient) thermistor and preparation method of high-entropy ceramic material
The invention discloses a high-entropy ceramic material for preparing a heat-stable NTC (Negative Temperature Coefficient) thermistor and a preparation method of the high-entropy ceramic material. The molecular formula of the high-entropy ceramic material is FexCoyNizCuwMn (3-x-y-z-w) O4, wherein 0.4 < = x < = 0.8, 0.4 < = y < = 0.8, 0.4 < = z < = 0.8, and 0.4 < = w < = 0.8; the preparation method comprises the following steps: preparing a metal oxide powder material according to a stoichiometric ratio; the preparation method comprises the following steps: carrying out ball milling and pre-sintering on metal oxide powder to obtain powder with reaction activity; carrying out ball milling and drying on the pre-sintered powder, and molding into a block ingot; compacting the block ingot in a cold isostatic press, and demolding to obtain a biscuit; and the biscuit is placed in a muffle furnace to be subjected to densification sintering according to a preset sintering curve, and the NTC thermistor is subsequently prepared. The prepared NTC thermistor is uniform in component, good in thermal stability and excellent in aging performance, and the resistance drift rate is within the application range.
本发明公开了一种用于制备热稳定型NTC热敏电阻的高熵陶瓷材料及制备方法，高熵陶瓷材料的分子式为FexCoyNizCuwMn(3‑x‑y‑z‑w)O4；其中，0.4≤x≤0.8，0.4≤y≤0.8，0.4≤z≤0.8，0.4≤w≤0.8；该制备方法，包括：按照化学计量比配置金属氧化物粉体材料；将金属氧化物粉体进行球磨、预烧，得到具备反应活性的粉料；将预烧粉料进行球磨并烘干，并成型为块锭；将块锭置于冷等静压机中压实，脱模得到素坯；将素坯置于马弗炉中以预设烧结曲线进行致密化烧结，进行后续制得NTC热敏电阻。本发明所制得的NTC热敏电阻组分均匀，热稳定性好，老化性能优异，阻值漂移率在应用范围内。
High-entropy ceramic material for preparing heat-stable NTC (Negative Temperature Coefficient) thermistor and preparation method of high-entropy ceramic material
用于制备热稳定型NTC热敏电阻的高熵陶瓷材料及制备方法
PENG DEMIAO (author) / ZHAO SHIXI (author) / LI MINGXUAN (author)
2023-06-23
Patent
Electronic Resource
Chinese
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