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Preparation method of novel packing for sintering of 2:17-type samarium-cobalt permanent magnet material

A permanent magnet material and a new type of technology, applied in the field of pad preparation for sintering of new 2:17 type samarium cobalt permanent magnet materials, can solve problems such as polluting equipment, wasting energy, sticking, etc., to solve sticking problems and improve qualification rate, the effect of eliminating pollution

Inactive Publication Date: 2019-08-16
包头昆联磁业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] 2:17 type samarium cobalt permanent magnet material has excellent temperature characteristics and high magnetic properties, and is widely used in aviation, aerospace, national defense military industry, petroleum, special motors and other fields. The production of 2:17 type sintered samarium cobalt magnetic material is divided into There are five processes of smelting-milling-molding-sintering-heat treatment. During the sintering process, the maximum temperature can reach 1210 degrees, and the material has a liquid phase at this temperature, so sticking often occurs between the blank and the mat in contact with it during the sintering process. sticky, which reduces the pass rate of the material and seriously affects the subsequent machining process of the material
[0003] At present, the commonly used gasket is 40-mesh black silk cloth that has been treated at high temperature. The main component of its surface coating is metal zinc. Galvanizing on the surface of oxidation treatment, on the one hand, high-temperature treatment wastes energy and pollutes treatment equipment; on the other hand, the incomplete galvanizing treatment on the surface will still affect the performance of samarium cobalt permanent magnet materials. This is the current 2:17 type sintered One of the difficulties faced by samarium cobalt permanent magnet materials in the production process

Method used

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  • Preparation method of novel packing for sintering of 2:17-type samarium-cobalt permanent magnet material
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  • Preparation method of novel packing for sintering of 2:17-type samarium-cobalt permanent magnet material

Examples

Experimental program
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Effect test

Embodiment 1

[0040] A novel 2:17 type samarium cobalt permanent magnet material sintering pad preparation method, comprising the following steps:

[0041] (1) Place the graphite box in the firing box of the sintering furnace;

[0042] (2) Place two layers of 40 molybdenum stainless steel mesh inside the graphite box;

[0043] (3) Sprinkle a new type of sintering pad powder on the 40 molybdenum stainless steel net;

[0044] (4) Place the samarium-cobalt permanent magnet material on the new-type sintering pad powder, and sinter it.

[0045] Wherein the novel sintering pad powder described in step 3 is prepared by the following steps:

[0046] (1) Lanthanum oxide powder La 2 o 3 preparation

[0047] Take a certain amount of 0.1mol / L La(NO 3 ) 3 Put the solution in a 400ml beaker, add a certain amount of polyethylene glycol and stir evenly, heat it on an electric furnace, and then add 0.5mol / L NH 4 HCO 3 solution, control the reaction temperature at about 40°C, and the pH at about 7.0. ...

Embodiment 2

[0062] A novel 2:17 type samarium cobalt permanent magnet material sintering pad preparation method, comprising the following steps:

[0063] (1) Place the graphite box in the firing box of the sintering furnace;

[0064] (2) Place two layers of 40 molybdenum stainless steel mesh inside the graphite box;

[0065] (3) Sprinkle a new type of sintering pad powder on the 40 molybdenum stainless steel net;

[0066] (4) Place the samarium-cobalt permanent magnet material on the new sintering pad powder, and sinter it.

[0067] Wherein the novel sintering pad powder described in step 3 is prepared by the following steps:

[0068] (1) Lanthanum oxide powder La 2 o 3 preparation

[0069] Take a certain amount of 0.1mol / L La(NO 3 ) 3 Put the solution in a 400ml beaker, add a certain amount of polyethylene glycol and stir evenly, heat it on an electric furnace, and then add 0.5mol / L NH 4 HCO 3 solution, control the reaction temperature at about 60°C, and the pH at about 7.0. Af...

Embodiment 3

[0084] A novel 2:17 type samarium cobalt permanent magnet material sintering pad preparation method, comprising the following steps:

[0085] (1) Place the graphite box in the firing box of the sintering furnace;

[0086] (2) Place two layers of 40 molybdenum stainless steel mesh inside the graphite box;

[0087] (3) Sprinkle a new type of sintering pad powder on the 40 molybdenum stainless steel net;

[0088] (4) Place the samarium-cobalt permanent magnet material on the new sintering pad powder, and sinter it.

[0089] Wherein the novel sintering pad powder described in step 3 is characterized in that it is prepared by the following steps:

[0090] (1) Lanthanum oxide powder La 2 o 3 preparation

[0091] Take a certain amount of 0.1mol / L La(NO 3 ) 3 Put the solution in a 400ml beaker, add a certain amount of polyethylene glycol and stir evenly, heat it on an electric furnace, and then add 0.5mol / L NH 4 HCO 3 solution, control the reaction temperature at about 80°C, an...

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Abstract

The invention discloses a preparation method of novel packing for sintering of a 2:17-type samarium-cobalt permanent magnet material, and relates to the technical field of preparation and applicationof rare earth permanent magnet materials. The preparation method comprises the steps: putting a graphite box in a sintering furnace burning bearing box, putting two layers of stainless steel nets of 40 meshes inside the graphite box, sprinkling novel sintering packing powder on the 40-mesh stainless steel nets, putting a samarium-cobalt permanent magnet material on the novel sintering packing powder, and performing sintering on the samarium-cobalt permanent magnet material. Through adoption of the novel packing, a procedure of high temperature elimination of plated zinc on the surface of 40-mesh black wire cloth is eliminated, energy is saved, the problems of pollution to a high temperature processing device and adhesion, caused by incomplete treatment, of the packing layer and the samarium-cobalt permanent magnet material are solved, and the pass rate of the product is improved, so that the subsequent machining process is facilitated; and after the thin layer of powder which is lanthanum oxide powder or samarium oxide powder or cerium oxide powder or a mixture of the three at an arbitrary ratio is sprinkled on the surface of the stainless steel, the problem of adhesion is solved completely.

Description

technical field [0001] The invention relates to the technical field of rare earth permanent magnet material manufacturing, in particular to a preparation method of a novel 2:17 type samarium cobalt permanent magnet material for sintering pad. Background technique [0002] 2:17 type samarium cobalt permanent magnet material has excellent temperature characteristics and high magnetic properties, and is widely used in aviation, aerospace, national defense and military industry, petroleum, special motors and other fields. The production of 2:17 type sintered samarium cobalt magnetic material is divided into There are five processes of smelting-milling-molding-sintering-heat treatment. During the sintering process, the maximum temperature can reach 1210 degrees, and the material has a liquid phase at this temperature. sticky, which reduces the qualified rate of the material and seriously affects the subsequent machining process of the material. [0003] At present, the commonly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/622C04B35/66C04B35/00C04B35/64
CPCC04B35/00C04B35/50C04B35/622C04B35/64C04B35/66C04B2235/3224C04B2235/3227C04B2235/3229
Inventor 张伟
Owner 包头昆联磁业有限公司