Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Barium titanate-based PTC ceramic and preparation method thereof
The invention provides barium titanate-based PTC (Positive Temperature Coefficient) ceramic and a preparation method thereof. The preparation method comprises the following steps: weighing primary raw materials, wherein the primary raw materials comprise BaCO3, TiO2, SrCO3 and Y2O3; sequentially performing primary ball milling and primary drying on the primary raw material to obtain primary powder; calcining the primary powder to obtain a calcined material; mixing the calcined material with a sintering aid, and sequentially carrying out secondary ball milling and secondary drying on the obtained mixture to obtain secondary powder; mixing the secondary powder with a binder and a lubricant to obtain mixed granules; tabletting the mixed granules to obtain a green body; the green body is subjected to glue discharging and sintering, the barium titanate-based PTC ceramic is obtained, the Curie temperature of the barium titanate-based PTC ceramic ranges from 0 DEG C to 90 DEG C, and the order of magnitude of the normal-temperature resistivity ranges from 105 omega.cm to 108 omega.cm. The barium titanate-based PTC ceramic prepared by the invention has the characteristics of low Curie temperature and high normal-temperature resistivity, and keeps excellent PTC characteristics.
本发明提供了钛酸钡基PTC陶瓷及其制备方法。该制备方法包括：称量一次原料，一次原料包括BaCO3、TiO2、SrCO3和Y2O3；将一次原料依次进行一次球磨和一次烘干，得到一次粉体；将一次粉体进行煅烧，得到煅烧料；将煅烧料和助烧剂混合，并对获得混合物依次进行二次球磨和二次烘干，得到二次粉体；将二次粉体与粘结剂和润滑剂混合，得到混合粒料；将混合粒料进行压片得到生坯；将生坯进行排胶烧结，得到钛酸钡基PTC陶瓷，所述钛酸钡基PTC陶瓷的居里温度为0℃～90℃，常温电阻率的数量级为105～108Ω·cm。本发明制备的钛酸钡基PTC陶瓷具有低居里温度和高常温电阻率特性，并保持了优良的PTC特性。
Barium titanate-based PTC ceramic and preparation method thereof
The invention provides barium titanate-based PTC (Positive Temperature Coefficient) ceramic and a preparation method thereof. The preparation method comprises the following steps: weighing primary raw materials, wherein the primary raw materials comprise BaCO3, TiO2, SrCO3 and Y2O3; sequentially performing primary ball milling and primary drying on the primary raw material to obtain primary powder; calcining the primary powder to obtain a calcined material; mixing the calcined material with a sintering aid, and sequentially carrying out secondary ball milling and secondary drying on the obtained mixture to obtain secondary powder; mixing the secondary powder with a binder and a lubricant to obtain mixed granules; tabletting the mixed granules to obtain a green body; the green body is subjected to glue discharging and sintering, the barium titanate-based PTC ceramic is obtained, the Curie temperature of the barium titanate-based PTC ceramic ranges from 0 DEG C to 90 DEG C, and the order of magnitude of the normal-temperature resistivity ranges from 105 omega.cm to 108 omega.cm. The barium titanate-based PTC ceramic prepared by the invention has the characteristics of low Curie temperature and high normal-temperature resistivity, and keeps excellent PTC characteristics.
本发明提供了钛酸钡基PTC陶瓷及其制备方法。该制备方法包括：称量一次原料，一次原料包括BaCO3、TiO2、SrCO3和Y2O3；将一次原料依次进行一次球磨和一次烘干，得到一次粉体；将一次粉体进行煅烧，得到煅烧料；将煅烧料和助烧剂混合，并对获得混合物依次进行二次球磨和二次烘干，得到二次粉体；将二次粉体与粘结剂和润滑剂混合，得到混合粒料；将混合粒料进行压片得到生坯；将生坯进行排胶烧结，得到钛酸钡基PTC陶瓷，所述钛酸钡基PTC陶瓷的居里温度为0℃～90℃，常温电阻率的数量级为105～108Ω·cm。本发明制备的钛酸钡基PTC陶瓷具有低居里温度和高常温电阻率特性，并保持了优良的PTC特性。
Barium titanate-based PTC ceramic and preparation method thereof
钛酸钡基PTC陶瓷及其制备方法
ZHOU YUANXIANG (Autor:in) / YANG DA (Autor:in) / JIANG GUIMIN (Autor:in) / TENG CHENYUAN (Autor:in) / ZHANG YUNXIAO (Autor:in) / WANG NINI (Autor:in)
24.11.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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