HfO2-containing ferromagnetic core manufacturing method
A manufacturing method and ferromagnetic core technology, which are applied in the manufacture of inductors/transformers/magnets, inorganic material magnetism, electrical components, etc., can solve the problems of low mechanical strength of materials, low saturation magnetic induction intensity, unsuitable for cutting, etc. The effect of small deformation and low porosity
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[0017] Example 1: Containing HfO 2 The manufacture method of the ferromagnetic core, comprises the following steps:
[0018] (1) The ratio of raw materials is calculated in parts by weight (catties), reduced iron powder 71, iron oxide powder 16, MnO 4.4, ZnO 3.9, modified tree ash 2, nano-carbon 0.6, HfO 2 2. SiO2 2 2.6, V 2 o 5 3.6, CuO 2.5, the modified tree ash is prepared by the following method:
[0019] a. Soak tree ashes with 10% sodium hydroxide solution for 4-5 hours;
[0020] b. Soak in 10% hydrochloric acid solution for 4-5 hours;
[0021] c. Wash with deionized water several times until the tree ash is neutral, then dry;
[0022] d. Grinding to 0.8-1.0 μm powder to obtain modified tree ash;
[0023] (2) Pre-combustion: Add water and dispersant to the raw materials except modified tree ash and nano-carbon for a ball mill for 3-4 hours, then spray dry, and pre-calcine. 3-5 hours;
[0024] (3) Secondary ball milling: add water and dispersant to the prim...
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