Preparation method of Bi-substituted LiZnTiMn gyromagnetic ferrite substrate material

Preparation method of Bi-substituted LiZnTiMn gyromagnetic ferrite substrate material

  • CN 105,884,342 B
  • Filed: 02/23/2016
  • Issued: 02/18/2020
  • Est. Priority Date: 02/23/2016
  • Status: Active Grant
First Claim
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1. A preparation method of a Bi-substituted LiZnTiMn gyromagnetic ferrite substrate material comprises the following steps:

  • step 1;

    with Li2CO3

    ZnO、

    TiO2

    Mn3O4

    Fe2O3And Bi2O3As a raw material, according to Li0.42Zn0.27Ti0.11Mn0.1Fe2.1-xBixO4Weighing materials according to the molecular formula, and preparing to obtain initial powder, wherein the weight is 0<

    x<

    0.01;

    Step 2;

    performing wet ball milling on the initial powder obtained in the step 1, wherein the ball milling time is 4-6 h, pre-burning the dried powder in a sintering furnace, the pre-burning temperature is 840-860 ℃

    , the pre-burning time is 1-3 h, and then naturally cooling to room temperature along with the furnace to obtain pre-burned powder;

    and step 3;

    performing secondary ball milling on the pre-sintered powder obtained in the step 2, wherein the ball milling time is 4-8 h, and the ball milling rotating speed is 200-250 r/min;

    taking out the slurry subjected to secondary ball milling, drying, adding 8-10 wt% of polyvinyl alcohol solution, granulating, forming and pressing into a blank; and

    then placing the pressed blank into a sintering furnace, sintering for 2-3 h at the temperature of 880-920 ℃

    , and cooling to room temperature along with the furnace to obtain the Bi-substituted LiZnTiMn gyromagnetic ferrite substrate material.

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