共沉淀法制备Co_2-Z型铁氧体形成动力学过程研究

Study on Kinetic Process of Co_2 - Z Hexaferrite by Co - Precipitation

用化学共沉淀法制备得到了Z型六角铁氧体,并研究了它的动力学过程;详细讨论了煅烧制度,如煅烧温度、升温速率和却冷方式对最终产物晶体结构的影响。研究表明:Co2—Z型六角铁氧体的生成序为:Ba-M→Ba-M+Co2-Y→Co2-Z;在1200℃下煅烧4h,可获得以Co2-Z为主晶相的铁氧体材料;升温速率及冷却速率对晶体的形成与结构有影响,快速升温影响最为明显。

Co2 - Z hexaferrite was obtained by co - precipitation, and its kinetic process was studied. The effects of calcination system and cooling mode on crystal structure of the products were discussed. Results show that the forming order of Co2 - Z hexaferrite is Ba - M→Ba - M + Co2 - Y→Co2 - Z. A ferrite material with the crystalline of Co2 - Z was obtained after the precursors being calcinated for 4h. Both heating rate and cooling rate have effects on the formation and morphology of crystalline, the fast heating rate has more significant effect on them.