制备用于质子同步加速器中使用的高频大功率铁氧体材料,前人均采用氧化物球混工艺;我们采用适于实验室批量试制的草酸盐共沉淀工艺,并用稀土元素钐掺杂改性,取得了令人满意的结果。用我们确定的工艺条件,制备组成为 Ni_(0.37)Zn_(0.65)Co_(0.02)Fe_(1.96)O_(4±r)(外掺0.1原子%钐)的φ18mm 烧结环,在频率f=5MHz,射频磁通密度 B_(rf)=100GS 下测试,其μ_rQ_mf=3.6×10~(10);在有交直流偏磁场(60A,20Hz) Preparation of high-frequency high-power ferrite materials used in the proton synchrotron, the former per capita oxide ball mixing process; we used suitable for laboratory batch trial of oxalate coprecipitation process, and doped with rare earth samarium Sex, and achieved satisfactory results. Using φ18mm sintered ring of Ni_ (0.37) Zn_ (0.65) Co_ (0.02) Fe_ (1.96) O_ (4 ± r) (doped with 0.1 atom% of samarium) with the determined process conditions, , RF flux density B rf = 100GS test, the μ_rQ_mf = 3.6 × 10 ~ (10); in the AC and DC bias magnetic field (60A, 20Hz)