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重点研究以Ba1-xSrxTiO3和(V1-xCrx)2O3为主要基体的双基体PTC热敏厚膜材料的相关特性。用(V1-xCrx)2O3取代价格昂贵的RuO2和银粉,不仅降低了室温电阻率,消除了非欧姆接触,同时提高了厚膜材料的性能,并显著降低了成本。独立地设计了用化学共沉淀方法制备Ba1-xSrxTiO3微粉的两个化学反应方程式,深入分析了聚乙二醇和无水乙醇在制备纳米微粉时所起的防止颗粒发生团聚现象的作用。由于大分子量的聚乙二醇几乎是无毒的[1],对人体基本无毒害作用,因而有广泛的推广价值。
The relevant properties of bismuth-based PTC thermosensitive thick film materials with Ba1-xSrxTiO3 and (V1-xCrx) 2O3 as their main substrates are mainly studied. Replacing the expensive RuO2 and silver powders with (V1-xCrx) 2O3 not only reduces room temperature resistivity, eliminates non-ohmic contact, improves thick film material properties, and significantly reduces costs. The two chemical reaction equations for the preparation of Ba1-xSrxTiO3 powders by chemical coprecipitation method were independently designed. The effects of preventing the agglomeration of particles during the preparation of nanosized powders were analyzed in depth. As the large molecular weight polyethylene glycol is almost non-toxic [1], the basic non-toxic to the human body, which has a wide range of promotional value.