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High-entropy perovskite type thermal sensitive ceramic with high temperature and negative temperature coefficient as well as preparation method and application of thermal sensitive ceramic
The invention provides high-entropy perovskite type high-temperature negative-temperature-coefficient thermal sensitive ceramic, a preparation method and application, and belongs to the field of perovskite type semiconductor materials.The high-temperature negative-temperature-coefficient thermal sensitive ceramic is prepared by mixing lanthanum trioxide, neodymium oxide, samarium oxide, europium oxide and chromic oxide with an oxide of A respectively, and then adding an additive A, the perovskite structure (La0. 2Nd0. 2Sm0. 2Eu0. 2A0. 2) CrO3 heat-sensitive material can be obtained through wet-process three-dimensional vibration ball milling, powder calcination, cold isostatic pressing molding and high-temperature sintering, and A is one of Pr, Tb, Dy, Ho, Er, Yb, Lu and Y. The invention also discloses a preparation method of the perovskite structure (La0. 2Nd0. 2Sm0. 2Eu0. 2A0. 2) CrO3 heat-sensitive material. Through determination, the electrical property parameters of the series of materials prepared by the embodiment are as follows: B 25 DEG C/1500 DEG C is 1625-1742K, and rho 1500 DEG C is 7.48 * 10 < 2 > omega.cm to 7.75 * 10 < 2 > omega.cm; meanwhile, the corresponding material has excellent negative temperature coefficient characteristics within the temperature range of 25-1500 DEG C, and shows high-temperature aging stability at high temperature. The high-entropy perovskite type high-temperature negative temperature coefficient thermal sensitive ceramic disclosed by the invention has an applicable temperature upper limit as high as 1500 DEG C, is high in temperature resistance linear correlation degree and good in consistency, and is suitable for manufacturing high-temperature thermal sensitive components.
本发明提供一种高熵钙钛矿型高温负温度系数热敏陶瓷、制备方法及应用，属于钙钛矿型半导体材料领域，该系列高温型负温度系数热敏材料以三氧化二镧、三氧化二钕、三氧化二钐、三氧化二铕和三氧化二铬分别和A的氧化物混合，经过湿法三维震动球磨、粉体煅烧、冷等静压成型、高温烧结，即可得到钙钛矿结构(La0.2Nd0.2Sm0.2Eu0.2A0.2)CrO3热敏材料，A为Pr、Tb、Dy、Ho、Er、Yb、Lu、Y中的一种。经测定，实施例制备的系列材料电性能参数为：B25℃/1500℃＝1625K～1742K，ρ1500℃＝7.48×102Ω·cm～7.75×102Ω·cm；同时，相应材料在温度区间25℃～1500℃内具有优良的负温度系数特性，并在高温下表现出高温老化稳定性。本申请的高熵钙钛矿型高温负温度系数热敏陶瓷具有高达1500℃的适用温度上限，阻温线性相关度高，一致性好，适于制造高温热敏元器件。
High-entropy perovskite type thermal sensitive ceramic with high temperature and negative temperature coefficient as well as preparation method and application of thermal sensitive ceramic
The invention provides high-entropy perovskite type high-temperature negative-temperature-coefficient thermal sensitive ceramic, a preparation method and application, and belongs to the field of perovskite type semiconductor materials.The high-temperature negative-temperature-coefficient thermal sensitive ceramic is prepared by mixing lanthanum trioxide, neodymium oxide, samarium oxide, europium oxide and chromic oxide with an oxide of A respectively, and then adding an additive A, the perovskite structure (La0. 2Nd0. 2Sm0. 2Eu0. 2A0. 2) CrO3 heat-sensitive material can be obtained through wet-process three-dimensional vibration ball milling, powder calcination, cold isostatic pressing molding and high-temperature sintering, and A is one of Pr, Tb, Dy, Ho, Er, Yb, Lu and Y. The invention also discloses a preparation method of the perovskite structure (La0. 2Nd0. 2Sm0. 2Eu0. 2A0. 2) CrO3 heat-sensitive material. Through determination, the electrical property parameters of the series of materials prepared by the embodiment are as follows: B 25 DEG C/1500 DEG C is 1625-1742K, and rho 1500 DEG C is 7.48 * 10 < 2 > omega.cm to 7.75 * 10 < 2 > omega.cm; meanwhile, the corresponding material has excellent negative temperature coefficient characteristics within the temperature range of 25-1500 DEG C, and shows high-temperature aging stability at high temperature. The high-entropy perovskite type high-temperature negative temperature coefficient thermal sensitive ceramic disclosed by the invention has an applicable temperature upper limit as high as 1500 DEG C, is high in temperature resistance linear correlation degree and good in consistency, and is suitable for manufacturing high-temperature thermal sensitive components.
本发明提供一种高熵钙钛矿型高温负温度系数热敏陶瓷、制备方法及应用，属于钙钛矿型半导体材料领域，该系列高温型负温度系数热敏材料以三氧化二镧、三氧化二钕、三氧化二钐、三氧化二铕和三氧化二铬分别和A的氧化物混合，经过湿法三维震动球磨、粉体煅烧、冷等静压成型、高温烧结，即可得到钙钛矿结构(La0.2Nd0.2Sm0.2Eu0.2A0.2)CrO3热敏材料，A为Pr、Tb、Dy、Ho、Er、Yb、Lu、Y中的一种。经测定，实施例制备的系列材料电性能参数为：B25℃/1500℃＝1625K～1742K，ρ1500℃＝7.48×102Ω·cm～7.75×102Ω·cm；同时，相应材料在温度区间25℃～1500℃内具有优良的负温度系数特性，并在高温下表现出高温老化稳定性。本申请的高熵钙钛矿型高温负温度系数热敏陶瓷具有高达1500℃的适用温度上限，阻温线性相关度高，一致性好，适于制造高温热敏元器件。
High-entropy perovskite type thermal sensitive ceramic with high temperature and negative temperature coefficient as well as preparation method and application of thermal sensitive ceramic
高熵钙钛矿型高温负温度系数热敏陶瓷、制备方法及应用
GAO BO (author) / CHEN XIAOYI (author) / KONG WENWEN (author) / CHEN CHAOYANG (author)
2024-03-29
Patent
Electronic Resource
Chinese
| European Patent Office | 2024
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