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Low-temperature sintering method for barium titanate-based thermistor
The invention relates to the field of preparation of thermistor materials, in particular to a low-temperature sintering method for a barium titanate-based thermistor. According to the low-temperaturesintering method for the barium titanate-based thermistor in the invention, a preparation method for rare earth doped barium titanate nano-powder is provided, and the barium titanate-based thermistoris prepared from the powder. The prepared rare earth-doped barium titanate nano-powder has a large specific surface area and is beneficial for increasing free energy on the surface of the material soas to facilitate densification of a material at a low sintering temperature; and in addition, a low-temperature sintering aid, namely the barium carbonate nano-powder is added in the sintering process, so grain growth can be promoted, the grain growth is beneficial for reducing the number of pores in ceramic and continuously improving the density and semiconductibility of the ceramic, and barium carbonate can generate defect diffusion in the sintering process and can also promote intergranular substance transmission so as to promote the increase of a densification degree.
本发明涉及热敏电阻材料制备领域，具体关于一种钛酸钡基热敏电阻低温烧结方法；本发明的一种钛酸钡基热敏电阻低温烧结方法，本方法提供了一种稀土掺杂钛酸钡纳米粉体的制备方法，并用该粉体制备成了一种钛酸钡基热敏电阻；制备的稀土掺杂钛酸钡纳米粉体具有较大的比表面积，有利于增加材料表面自由能从而有助于材料在低烧结温度下实现致密化，另外本发明还在烧结过程中加入低温烧结助剂纳米碳酸钡粉体，能够促进晶粒生长，晶粒生长有助于减少陶瓷中气孔数量，不断提高陶瓷致密度和半导体化，另一方面碳酸钡能在烧结过程中产生缺陷扩散，也可促进了晶粒间物质传输从而促进致密化层度的增加。
Low-temperature sintering method for barium titanate-based thermistor
The invention relates to the field of preparation of thermistor materials, in particular to a low-temperature sintering method for a barium titanate-based thermistor. According to the low-temperaturesintering method for the barium titanate-based thermistor in the invention, a preparation method for rare earth doped barium titanate nano-powder is provided, and the barium titanate-based thermistoris prepared from the powder. The prepared rare earth-doped barium titanate nano-powder has a large specific surface area and is beneficial for increasing free energy on the surface of the material soas to facilitate densification of a material at a low sintering temperature; and in addition, a low-temperature sintering aid, namely the barium carbonate nano-powder is added in the sintering process, so grain growth can be promoted, the grain growth is beneficial for reducing the number of pores in ceramic and continuously improving the density and semiconductibility of the ceramic, and barium carbonate can generate defect diffusion in the sintering process and can also promote intergranular substance transmission so as to promote the increase of a densification degree.
本发明涉及热敏电阻材料制备领域，具体关于一种钛酸钡基热敏电阻低温烧结方法；本发明的一种钛酸钡基热敏电阻低温烧结方法，本方法提供了一种稀土掺杂钛酸钡纳米粉体的制备方法，并用该粉体制备成了一种钛酸钡基热敏电阻；制备的稀土掺杂钛酸钡纳米粉体具有较大的比表面积，有利于增加材料表面自由能从而有助于材料在低烧结温度下实现致密化，另外本发明还在烧结过程中加入低温烧结助剂纳米碳酸钡粉体，能够促进晶粒生长，晶粒生长有助于减少陶瓷中气孔数量，不断提高陶瓷致密度和半导体化，另一方面碳酸钡能在烧结过程中产生缺陷扩散，也可促进了晶粒间物质传输从而促进致密化层度的增加。
Low-temperature sintering method for barium titanate-based thermistor
一种钛酸钡基热敏电阻低温烧结方法
SI HUIXIAN (author) / ZHANG YIZHONG (author) / WU YOUJIA (author)
2020-11-17
Patent
Electronic Resource
Chinese
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