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采用草酸盐化学共沉淀工艺制备了La_xZn_xBa_((1-x))Fe_((12-x))O_(19)磁铅石型铁氧体,研究了烧结过程的相变与磁性,主要结论如下: 1)当La的置换量小于0.8时,基本上可以形成FeC_2O_4·2H_2O为基的(La, Ba, Zn, Fe)草酸盐固溶体。 2)La_xZn_xBa_((1-x))Fe_((12-x))O_(19)相的生成温度随x值的增加(x≥0.8)而升高。 3)L2_xZn_xBa_((1-x))Fe_((12-x)O_(19)的室温比磁化强度随x值的增加(z≤0.8)而增大,居里温度随x值的增加而降低。
La_xZn_xBa _ ((1-x)) Fe _ ((12-x)) O_ (19) magnetoplumbite ferrite was prepared by oxalate chemical coprecipitation process. The phase transition and magnetic properties of La_xZn_xBa_ (1-x) As follows: 1) When the substitution amount of La is less than 0.8, basically, a solid solution of (La, Ba, Zn, Fe) oxalate based on FeC2O4 2H2O can be formed. 2) The formation temperature of La_xZn_xBa_ ((1-x)) Fe_ ((12-x)) O_ (19) phase increases with the increase of x value (x≥0.8). 3) The magnetization at room temperature of L2_xZn_xBa_ ((1-x)) Fe_ (12-x) O_ (19) increases with the increase of x value (z≤0.8), and the Curie temperature decreases with the increase of x .