升温速率和烧结温度对纳米晶MnZn粉体直接制备功率铁氧体性能的影响

Effect of heating rate and sintering temperature on the properties of MnZn power ferrites fabricated directly by nano-crystalline powder

采用纳米晶粉体直接造粒压制成块材烧结的方法制备MnZn铁氧体,研究了不同的升温速率和烧结温度对样品微观结构、磁性能的影响。研究表明,与传统的制备方法相比,直接烧结纳米晶MnZn铁氧体粉体,可以降低烧结温度。采用低的升温速率有利于提高样品的密度和初始磁导率,降低比损耗因子,并且低温烧结可以形成良好的微观结构和磁性能。

The power MnZn ferrites were fabricated directly by nano-crystalline powder,and the effect of heating rate and sintering temperature on the microstructure and magnetic properties of power MnZn ferrites was investigated. The results showed that the sintering temperature decreased when the nano-crystalline powder was directly sintered compared with the traditional fabrication method. The high density,initial permeability and low specific loss were obtained at low heating rate. In addition,the fine microstructure and magnetic properties were also obtained at low sintering temperature.