Ferrite wave-absorbing material and preparation method thereof
A wave-absorbing material and ferrite technology, applied in the field of radar absorbing materials, can solve the problems of reducing the initial magnetic permeability and dielectric constant, difficult large-scale production, complex preparation process, etc., to improve electromagnetic performance, The effect of low cost and simple process operation
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Embodiment 1
[0031] BaO, SrCO 3 , CoO and Fe 2 o 3 Analytical pure raw materials are composed according to the chemical formula 3(Ba 0.5 Sr 0.5 )O·2CoO·10.6Fe 2 o 3 0.25Sm 2 o 3 For batching, carry out ball milling and mixing in deionized water for 3 hours, after drying, heat to 1280°C at a heating rate of 3°C / min and pre-fire for 3 hours; add 0.25 moles of Sm 2 o 3 , in deionized water for secondary ball milling and mixing for 6 hours, after drying, heat up to 1250°C at a heating rate of 3°C / min for sintering, and keep warm for 3.5 hours; ball mill the sintered powder for 1 hour, and pass through a 200-mesh sieve to obtain The powder with a diameter of ≤74μm is then heat-treated at 250°C for 3 hours to obtain the ferrite wave-absorbing material. The drying temperature of the raw materials after the first ball milling and the second ball milling is 60-120°C. The purity of the raw material is ≥99.5%. figure 1 This is the scanning electron microscope (SEM) photo of the ferrite abs...
Embodiment 2
[0033] BaO, SrCO 3 , CoO and Fe 2 o 3 Analytical pure raw materials are composed according to the chemical formula 3(Ba 0.5 Sr 0.5 )O·2CoO·11.5Fe 2 o 3 0.15Sm 2 o 3 For batching, carry out ball milling and mixing in deionized water for 4 hours, after drying, heat up to 1270°C at a heating rate of 3°C / min for 3 hours; add 0.20 moles of Sm 2 o 3, in deionized water for secondary ball milling and mixing for 7 hours, after drying, heat up to 1260°C at a heating rate of 4°C / min for sintering, and keep warm for 4 hours; ball mill the sintered powder for 1.5 hours, and pass through a 200-mesh sieve to obtain The powder with a diameter of ≤74μm is then heat-treated at 250°C for 3 hours to obtain the ferrite wave-absorbing material. The drying temperature of the raw materials after the first ball milling and the second ball milling is 60-120°C. The purity of the raw material is ≥99.5%. Mix the obtained ferrite wave-absorbing powder with ordinary epoxy resin E51 in a mass rat...
Embodiment 3
[0035] BaO, SrCO 3 , CoO and Fe 2 o 3 Analytical pure raw materials are composed according to the chemical formula 3(Ba 0.5 Sr 0.5 )O·2CoO·10.8Fe 2 o 3 0.5Sm 2 o 3 For batching, carry out ball milling and mixing in deionized water for 3 hours, after drying, heat up to 1250°C at a heating rate of 4°C / min for 4.5 hours; add 0.5 moles of Sm 2 o 3 , in deionized water for secondary ball milling and mixing for 5 hours, after drying, heat up to 1280°C at a heating rate of 3°C / min for sintering, and keep warm for 3.5 hours; ball mill the sintered powder for 1 hour, and pass through a 200-mesh sieve to obtain The powder with a diameter of ≤74μm is then heat-treated at 250°C for 3 hours to obtain the ferrite wave-absorbing material. The drying temperature of the raw materials after the first ball milling and the second ball milling is 60-120°C. The purity of the raw material is ≥99.5%. Mix the obtained ferrite wave-absorbing powder with ordinary epoxy resin E51 in a mass rat...
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