Permanent magnet ferrite magnetic tile with high structural strength and preparation method thereof

Abstract

The application relates to the field of permanent ferrite materials, and specifically discloses a permanent ferrite magnetic tile with high structural strength and a preparation method thereof. The magnetic tile is prepared from the following components by weight: main component: red iron oxide 70~90 parts, 10~20 parts of strontium carbonate; auxiliary components: 6~13 parts of alumina, 0.8~1.2 parts of calcium carbonate, 0.2~0.5 parts of silicon dioxide; auxiliary: 1~3 parts of triethanolamine, sorbose 1 to 3 parts of alcohol; its preparation method is as follows: weighing the main component and the auxiliary components by weight, ball milling; first adding sorbitol, mixing; then adding triethanolamine, mixing, sedimentation, embryo preparation, at 1200 Sintered at ~1260° C. to obtain the permanent magnet ferrite magnetic tile. The magnetic tile of the present application has both high Br and high tensile strength; in addition, in the preparation method of the present application, by first adding sorbitol and then adding triethanolamine, the ferrite particles are uniformly distributed, which is beneficial to Improve the structural strength of the magnetic tile.

Description

technical field

[0001] The present application relates to the field of permanent magnet ferrite materials, and more particularly, to a permanent magnet ferrite magnet tile with high structural strength and a preparation method thereof. Background technique

[0002] Permanent magnet ferrite materials have a wide range of raw materials, low prices, excellent magnetic properties, and occupy an important position in the research and development of magnetic materials; the magnetic tiles on permanent magnet motors are made of permanent magnet ferrite materials; at present, Permanent magnet motors are widely used in home appliances, automobiles, computers, communications and other fields; parameters such as residual magnetization (Br) and intrinsic coercive force (Hcj) of permanent magnet ferrite materials have an important impact on the performance of magnetic tiles.

[0003] The Chinese invention patent with the authorization announcement number CN103771882B discloses a permanent...

Examples

Embodiment 1～8

[0055] As shown in Table 1, the main difference between Examples 1 to 8 lies in the ratio of raw materials.

Embodiment 1

[0057] The preparation method of the permanent magnet ferrite magnetic tile of embodiment 1 is as follows:

[0058] S1. take iron oxide red, strontium carbonate, alumina, calcium carbonate and silicon dioxide, ball mill 10h to obtain slurry 1;

[0059] S2. add sorbitol to the slurry 1, stir at 60r / min for 15min;

[0060] S3. add triethanolamine, stir at 60r / min for 30min, settle to a water content of 15%, and obtain a settled slurry;

[0061] S4. Inject the sedimentation slurry into the cemented carbide runner mold, and use a 150-ton automatic hydraulic press to press the sedimentation slurry into green embryos; place the green embryos in a sintering electric kiln for sintering, and control the temperature to 1200 ° C for 3 hours; after cooling Obtain permanent magnet ferrite tiles.

[0062] Among them, the heating rate is 3 ℃ / min; the specification of the steel ball is Φ6.35mm.

[0063] Table 1

[0064]

[0065]

Embodiment 9～14

[0067] Compared with Example 5, the difference between Examples 9 to 14 is that the formula also contains zirconium oxynitrate dihydrate and a hydrolysis accelerator.

[0068] As shown in Table 2, the main difference between Examples 9 to 14 is the ratio of raw materials.

[0069] Example 9 is taken as an example for description below.

[0070] S1. Weigh iron oxide red, strontium carbonate, alumina, calcium carbonate and silicon dioxide, after ball milling for 10h, add zirconium oxynitrate dihydrate and a hydrolysis accelerator, mix at 50r / min for 30min to obtain slurry 1

[0071] S2. Add sorbitol to slurry 2, stir at 60r / min for 15min;

[0072] S3. add triethanolamine, stir at 60r / min for 30min, settle to a water content of 15%, and obtain a settled slurry;

[0073] S4. Inject the sedimentation slurry into the cemented carbide runner mold, and use a 150-ton automatic hydraulic press to press the sedimentation slurry into green embryos; place the green embryos in a sintering...

technical field

[0001] The present application relates to the field of permanent magnet ferrite materials, and more particularly, to a permanent magnet ferrite magnet tile with high structural strength and a preparation method thereof. Background technique

[0002] Permanent magnet ferrite materials have a wide range of raw materials, low prices, excellent magnetic properties, and occupy an important position in the research and development of magnetic materials; the magnetic tiles on permanent magnet motors are made of permanent magnet ferrite materials; at present, Permanent magnet motors are widely used in home appliances, automobiles, computers, communications and other fields; parameters such as residual magnetization (Br) and intrinsic coercive force (Hcj) of permanent magnet ferrite materials have an important impact on the performance of magnetic tiles.

[0003] The Chinese invention patent with the authorization announcement number CN103771882B discloses a permanent...

Examples

Embodiment 1～8

[0055] As shown in Table 1, the main difference between Examples 1 to 8 lies in the ratio of raw materials.

Embodiment 1

[0057] The preparation method of the permanent magnet ferrite magnetic tile of embodiment 1 is as follows:

[0058] S1. take iron oxide red, strontium carbonate, alumina, calcium carbonate and silicon dioxide, ball mill 10h to obtain slurry 1;

[0059] S2. add sorbitol to the slurry 1, stir at 60r / min for 15min;

[0060] S3. add triethanolamine, stir at 60r / min for 30min, settle to a water content of 15%, and obtain a settled slurry;

[0061] S4. Inject the sedimentation slurry into the cemented carbide runner mold, and use a 150-ton automatic hydraulic press to press the sedimentation slurry into green embryos; place the green embryos in a sintering electric kiln for sintering, and control the temperature to 1200 ° C for 3 hours; after cooling Obtain permanent magnet ferrite tiles.

[0062] Among them, the heating rate is 3 ℃ / min; the specification of the steel ball is Φ6.35mm.

[0063] Table 1

[0064]

[0065]

Embodiment 9～14

[0067] Compared with Example 5, the difference between Examples 9 to 14 is that the formula also contains zirconium oxynitrate dihydrate and a hydrolysis accelerator.

[0068] As shown in Table 2, the main difference between Examples 9 to 14 is the ratio of raw materials.

[0069] Example 9 is taken as an example for description below.

[0070] S1. Weigh iron oxide red, strontium carbonate, alumina, calcium carbonate and silicon dioxide, after ball milling for 10h, add zirconium oxynitrate dihydrate and a hydrolysis accelerator, mix at 50r / min for 30min to obtain slurry 1

[0071] S2. Add sorbitol to slurry 2, stir at 60r / min for 15min;

[0072] S3. add triethanolamine, stir at 60r / min for 30min, settle to a water content of 15%, and obtain a settled slurry;

[0073] S4. Inject the sedimentation slurry into the cemented carbide runner mold, and use a 150-ton automatic hydraulic press to press the sedimentation slurry into green embryos; place the green embryos in a sintering...

Images