草酸盐共沉淀法制取优质锰锌铁氧体微细粉末的热力学分析

• 作 者: 郑昌琼 冉均国 杨云志 尹光福 刘耀敏
• 机 构: 四川联合大学
• 出 处: 稀有金属
• 发表日期: 1997年02期
• 关键词: 共沉淀 草酸盐 草酸盐共沉淀 共沉淀粉末 热力学分析 起始磁导率 锰锌铁氧体 温度灵敏度 磁性 软磁材料

对草酸盐共沉淀法制取锰锌铁氧体软磁材料粉末的ＦｅＳＯ４ＺｎＳＯ４ＭｎＳＯ４（ＮＨ４）２Ｃ２Ｏ４Ｈ２Ｏ体系进行热力学分析，得出最佳ｐＨ为４０～８２，热力学计算与试验吻合。草酸盐共沉淀粉末煅烧后平均粒径２２０μｍ，烧结温度比普通干法制粉低４０℃左右，制得的温敏锰锌铁氧体材料起始磁导率达４５５０左右，温度灵敏度≤１５℃，并在磁性温敏传感器中应用效果良好

Thermodynamic analysis of the FeSO4ZnSO4MnSO4 (NH4) 2C2O4H2O system prepared by oxalate coprecipitation method for Mn-Zn ferrite soft magnetic powder showed that the optimum pH was 40 ~ 82 and the thermodynamics Calculation and test match. The average particle diameter of oxalate coprecipitated powder after calcination is 2  20μm, the sintering temperature is about 40 ℃ lower than that of ordinary dry  milling, and the initial permeability of the prepared thermo-sensitive Mn-Zn ferrite material is about 4550.Temperature sensitivity ≤ 1  5 ℃, and the magnetic temperature-sensitive sensor with good results