Z-type hexagonal ferrite material and preparation method thereof
A technology of hexagonal ferrite and powder is applied in the field of Z-type hexagonal ferrite material and its preparation to achieve the effects of increasing the total magnetic moment, enhancing the interaction, and improving the anisotropy constant.
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[0023] This embodiment also provides a preparation method for preparing the above-mentioned Z-type hexagonal ferrite, comprising the following steps:
[0024] 1) Step 1, Fe2O3, BaCO3, SrCO3, CoO, Gd2O3 or Fe2O3, BaCO3, SrCO3, CoO, Sm2O3 are Fe2O3:73.4~74.9% by weight, BaCO3:9.2~13.8%, SrCO3:6.3~9.7%, CoO:5.7~5.9%, Gd2O3:0.3~0.8%; or Fe2O3:73.4~74.9%, BaCO3:9.2~13.8%, SrCO3:6.3~9.7%, CoO:5.7~5.9%, Sm2O3:0.3~0.8% The main ingredient is powdered, and mixed and stirred into a powder;
[0025] 2) In step 2, put the powder obtained in step 1 into a planetary ball mill, and add deionized water of equal mass for ball milling. The mass ratio of grinding medium to powder is 4:1~5:1 (preferably 5: 1), the ball milling time is 1~4 hours to make it evenly mixed;
[0026] 3) Step 3: Dry the powder obtained in Step 2, and put it into a sintering furnace for pre-firing after sieving. The pre-firing temperature is 800~1000℃, and the holding time is 1~4 hours;
[0027] 4) Step 4, put the pow...
Embodiment 1
[0035] Embodiment 1, proportioning molecular formula: Sr 3x Ba 3(1-x) co 2 Gd y Fe 24-y o 41 (where x=0.4, y=0.05); ingredient formula: Fe 2 o 3 :73.79%, BaCO 3 :13.71%, SrCO 3 : 6.37%, CoO: 5.78%; Gd 2 o 3:0.35%.
Embodiment 2
[0036] Embodiment 2, proportioning molecular formula: Sr 3x Ba 3(1-x) co 2 Gd y Fe 24-y o 41 (where x=0.4, y=0.1); ingredient formula: Fe 2 o 3 :73.49%, BaCO 3 :13.68%, SrCO 3 : 6.36%, CoO: 5.77%; Gd 2 o 3 :0.70%.
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