【摘要】 利用陶瓷工艺制备了居里温度为 2 0℃的热敏MnZn铁氧体材料 ,研究了预烧温度和烧结温度对材料初始磁导率 ,密度以及收缩率的影响。实验结果表明存在一最佳制备工艺 (预烧温度为 10 0 0℃ ,烧结温度为 115 0℃ ) ,在此工艺下制备的样品在居里温度附近有较大的磁导率变化量 ( 2 17℃ ) ,并且密度可达极大值。热敏MnZn铁氧体材料性能不但与配方有关 ,而且对于制备工艺非常敏感更多还原

【Abstract】 Temperature sensitive MnZn ferrites with Curie temperature of 20 ℃ were fabricated by means of conventional ceramic processes. The effect of presintering temperature and main sintering temperature on the initial permeability, density and shinkrage rate of the ferrites was investigated. It is shown that there exists an optimum of preparation condition (The temperature of presintering and sintering is 1000 and 1150 ℃, respectively). In this case, the slope of permeability and density reaches their maximum values. It is shown that the properties of thermal sensitive MnZn ferrites are strongly influenced by sintering process in addition to composition.更多还原