Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
High-temperature thermistor material and preparation method thereof
The invention relates to a high-temperature thermistor material and a preparation method thereof. The high-temperature thermistor material is prepared from the following raw materials: analytically pure Y2O3, Sm2O3 or Y2O3, Cr2O3 and MnO2. The preparation method comprises the following steps: performing mixed grinding on the raw materials, calcining the ground materials, performing mixed grinding on the calcined materials, molding the ground materials, performing high-temperature sintering on the molded material, and painting and burning electrodes so as to obtain a ceramic material compounded by a rare earth oxide Y2O3 and a perovskite structure MCr0.5Mn0.5O3 (M is Sm or Gd), wherein the material constant satisfies the following conditions: B300 DEG C/800 DEG C is equal to (4600-5600)*(1+/_2%) K, the resistance is (5.8-516)*(1+/_5%) kilohm under 100 DEG C, and after high-temperature aging is performed on the ceramic material under the temperature of 600 DEG C for 300 hours, the resistance change rate is within the range of minus 4% to 4%. The thermistor ceramic material prepared by the preparation method disclosed by the invention has the advantages that the performance is stable, and the consistency is good; the thermistor material has obvious negative-temperature coefficient characteristics within the range of (300-800) DEG C, and the thermistor material is a novel thermistor material suitable for manufacturing high-temperature thermistors.
High-temperature thermistor material and preparation method thereof
The invention relates to a high-temperature thermistor material and a preparation method thereof. The high-temperature thermistor material is prepared from the following raw materials: analytically pure Y2O3, Sm2O3 or Y2O3, Cr2O3 and MnO2. The preparation method comprises the following steps: performing mixed grinding on the raw materials, calcining the ground materials, performing mixed grinding on the calcined materials, molding the ground materials, performing high-temperature sintering on the molded material, and painting and burning electrodes so as to obtain a ceramic material compounded by a rare earth oxide Y2O3 and a perovskite structure MCr0.5Mn0.5O3 (M is Sm or Gd), wherein the material constant satisfies the following conditions: B300 DEG C/800 DEG C is equal to (4600-5600)*(1+/_2%) K, the resistance is (5.8-516)*(1+/_5%) kilohm under 100 DEG C, and after high-temperature aging is performed on the ceramic material under the temperature of 600 DEG C for 300 hours, the resistance change rate is within the range of minus 4% to 4%. The thermistor ceramic material prepared by the preparation method disclosed by the invention has the advantages that the performance is stable, and the consistency is good; the thermistor material has obvious negative-temperature coefficient characteristics within the range of (300-800) DEG C, and the thermistor material is a novel thermistor material suitable for manufacturing high-temperature thermistors.
High-temperature thermistor material and preparation method thereof
ZHAO QING (Autor:in) / ZHANG BO (Autor:in) / CHANG AIMIN (Autor:in)
29.04.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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