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Low-temperature high-coercivity permanent magnetic ferrite and production process thereof
The invention relates to the technical field of permanent magnetic ferrites, in particular to a low-temperature high-coercive-force permanent magnetic ferrite and a production process thereof.The low-temperature high-coercive-force permanent magnetic ferrite is prepared from SrCO3, CaCO3, Al2O3, Fe2O3, Cr2O3 and La2O3 according to the formula of Sr < 1-x-y > Ca < x > La < y > Al < z > Cr < w > Fe < 12-z-w > O < 19 > (x = 0.1-0.4; y is equal to 0 to 0.3; z is equal to 1.5-3, w is equal to 0-2, and the sum of z and w is smaller than 4), ball milling is conducted through a high-energy ball mill, then ball milling is conducted through a low-energy ball mill, and after ball milling powder is prepared, primary ball milling materials are sequentially dried, sieved and pre-sintered; the pre-sintered material is subjected to coarse crushing, an additive is added, a high-energy ball mill is adopted for wet milling, then a low-energy ball mill is adopted for secondary ball milling of the pre-sintered material, secondary ball milling slurry is pressed into a green body sample under an external magnetic field, high-temperature sintering is carried out, and the compact block high-coercivity ferrite magnet with high coercivity at low temperature is prepared.
本发明涉及永磁铁氧体技术领域，具体涉及一种低温高矫顽力永磁铁氧体及生产工艺，以SrCO3、CaCO3、Al2O3、Fe2O3、Cr2O3、La2O3为原料，按照Sr1‑x‑yCaxLayAlzCrwFe12‑z‑wO19(x＝0.1‑0.4；y＝0‑0.3；z＝1.5‑3，w＝0‑2，z+w＜4)进行配比，先利用高能球磨球磨，然后采用低能球磨机球磨，球磨制粉后将一次球磨料依次进行烘干、过筛、预烧；随后将预烧料粗破碎，加入添加剂，采用高能球磨机湿磨，然后采用低能球磨机对预烧料进行二次球磨，将二次球磨浆料在外加磁场下压制成生坯样品，利用高温烧结制得致密块体高矫顽力铁氧体磁体，且低温下具有高矫顽力。
Low-temperature high-coercivity permanent magnetic ferrite and production process thereof
The invention relates to the technical field of permanent magnetic ferrites, in particular to a low-temperature high-coercive-force permanent magnetic ferrite and a production process thereof.The low-temperature high-coercive-force permanent magnetic ferrite is prepared from SrCO3, CaCO3, Al2O3, Fe2O3, Cr2O3 and La2O3 according to the formula of Sr < 1-x-y > Ca < x > La < y > Al < z > Cr < w > Fe < 12-z-w > O < 19 > (x = 0.1-0.4; y is equal to 0 to 0.3; z is equal to 1.5-3, w is equal to 0-2, and the sum of z and w is smaller than 4), ball milling is conducted through a high-energy ball mill, then ball milling is conducted through a low-energy ball mill, and after ball milling powder is prepared, primary ball milling materials are sequentially dried, sieved and pre-sintered; the pre-sintered material is subjected to coarse crushing, an additive is added, a high-energy ball mill is adopted for wet milling, then a low-energy ball mill is adopted for secondary ball milling of the pre-sintered material, secondary ball milling slurry is pressed into a green body sample under an external magnetic field, high-temperature sintering is carried out, and the compact block high-coercivity ferrite magnet with high coercivity at low temperature is prepared.
本发明涉及永磁铁氧体技术领域，具体涉及一种低温高矫顽力永磁铁氧体及生产工艺，以SrCO3、CaCO3、Al2O3、Fe2O3、Cr2O3、La2O3为原料，按照Sr1‑x‑yCaxLayAlzCrwFe12‑z‑wO19(x＝0.1‑0.4；y＝0‑0.3；z＝1.5‑3，w＝0‑2，z+w＜4)进行配比，先利用高能球磨球磨，然后采用低能球磨机球磨，球磨制粉后将一次球磨料依次进行烘干、过筛、预烧；随后将预烧料粗破碎，加入添加剂，采用高能球磨机湿磨，然后采用低能球磨机对预烧料进行二次球磨，将二次球磨浆料在外加磁场下压制成生坯样品，利用高温烧结制得致密块体高矫顽力铁氧体磁体，且低温下具有高矫顽力。
Low-temperature high-coercivity permanent magnetic ferrite and production process thereof
一种低温高矫顽力永磁铁氧体及生产工艺
MA YILONG (author) / REN XIANGRU (author) / LUO XIANFU (author) / SHAO BIN (author) / ZHANG YUNCHUAN (author) / ZHANG QINGQING (author) / ZHONG GUANGWEI (author)
2024-02-09
Patent
Electronic Resource
Chinese
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