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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Sintering-modified mixed Ni-Co-Cu oxymanganospinels for NTC electroceramics
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Sintering-modified mixed Ni-Co-Cu oxymanganospinels for NTC electroceramics

机译：用于NTC电瓷的烧结改性混合Ni-Co-Cu氧锰松油

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摘要

Mixed Ni-Co-Cu oxymanganospinels of Cu_(0.1)Ni_(0.8)Co_(0.2)Mn_(1.9)O_4 composition with improved functional reliability are first developed for possible application as high-precise NTC thermistors. It is established the amount of additional rock-salt NiO phase in these ceramics, which was not externally introduced at the initial stages of ceramics processing, but extracted during sintering route occurs a decisive role to inhibit the parasitic degradation caused by thermal storage at the elevated temperatures. This effect is well revealed only in ceramics having a character fine-grain microstructure obtained due to injection of small amount of thermally transferred energy, while structural monolithization caused by great value of thermally transferred energy into ceramics bulk reveals an opposite influence. The fact, the ceramics with fine-grain microstructure and large content of rock-salt NiO extractions demonstrate the best suitability for stretched-exponential relaxation kinetics (the most appropriate one for describing degradation kinetics in structurally dispersive solids like ceramics) serves as additional confirmation to the above conclusion.
机译：首先开发了具有改进的功能可靠性的Cu_（0.1）Ni_（0.8）Co_（0.2）Mn_（1.9）O_4组成的混合Ni-Co-Cu氧锰松油，可能用作高精度NTC热敏电阻。确定了这些陶瓷中额外的岩盐NiO相的数量，该数量并未在陶瓷加工的初始阶段从外部引入，而是在烧结过程中提取而起着决定性的作用，以抑制高温下储热引起的寄生降解。温度。仅在由于注入少量的热传递能量而获得具有特征细晶粒微结构的陶瓷中，才能很好地体现这种效果，而由于将大量热传递能量注入陶瓷本体而导致的结构整体化显示出相反的影响。事实上，具有微细晶粒结构和大量岩盐NiO萃取物的陶瓷表现出最适合拉伸指数松弛动力学（最适合描述结构分散固体中降解动力学的陶瓷，如陶瓷）可以进一步证实以上结论。

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