阅读说明：本技术 一种永磁铁氧体磁瓦的制备方法 (Preparation method of permanent magnetic ferrite magnetic shoes ) 是由 陈杰 张小军 方述明 于 2018-07-19 设计创作，主要内容包括：本发明公开了一种永磁铁氧体磁瓦的制备方法,取氧化铁、氧化铈、苏打混合后放入球磨机中进行球磨；将研磨后的颗粒物料加水搅拌后压制成块,放入炉体内高温烧制；将成块物料进行破碎,然后加入硼酸、氧化镧、氧化铬、硅酸铝纤维、氧化锌、滑石粉并混匀；将混匀后的物料放入球磨机内进行二次研磨,对浆料进行脱水；将脱水后物料进行压制成坯、烧结后,磨削支撑永磁铁氧体磁瓦产品。本发明有效提高磁瓦的综合性能。(The invention discloses a preparation method of permanent magnetic ferrite magnetic tiles, which comprises the steps of mixing iron oxide, cerium oxide and soda, putting the mixture into a ball mill for ball milling, adding water into the ground particle materials, stirring, pressing the mixture into blocks, putting the blocks into a furnace body for high-temperature firing, crushing the blocks, adding boric acid, lanthanum oxide, chromium oxide, aluminum silicate fiber, zinc oxide and talcum powder, uniformly mixing, putting the uniformly mixed materials into the ball mill for secondary grinding, dehydrating the slurry, pressing the dehydrated materials into blanks, sintering, and grinding and supporting permanent magnetic ferrite magnetic tile products.)

The preparation method of 1, permanent magnetic ferrite magnetic tiles is characterized by comprising the following steps:

(1) mixing 10-20 parts of ferric oxide, 2-10 parts of cerium oxide and 4-6 parts of soda, and then putting the mixture into a ball mill for ball milling until the particle size is below 1.5-1.8 um;

(2) adding water into the ground granular materials, stirring, pressing into blocks, placing into a furnace body, and firing at a high temperature, wherein the firing temperature is controlled to be 1300-1350 ℃, the firing time is 3.5-4.5 h, and the propelling speed is 35-45min per plate;

(3) crushing the block material to a particle size of 2.8-3.5 um, adding 2-6 parts of boric acid, 1-3 parts of lanthanum oxide, 6-10 parts of chromium oxide, 2-8 parts of aluminum silicate fiber, 1-6 parts of zinc oxide and 2-6 parts of talcum powder, and uniformly mixing;

(4) putting the uniformly mixed material into a ball mill for secondary grinding, and dehydrating the slurry after grinding to the particle size of 1-1.5 um, wherein the water content is controlled to be 32-34%;

(5) and pressing the dehydrated material into a blank, sintering, and grinding to obtain the permanent magnetic ferrite magnetic shoe product.

2. The method for preparing kinds of permanent ferrite magnetic tiles according to claim 1, wherein the pressing into a green body in step (5) is performed by injecting slurry into a grinding tool to form a green body under a pressure of 20MPa-21 MPa.

3. The method for preparing kinds of permanent ferrite magnetic tiles according to claim 2, wherein the density of the green compact is 3.1g/cm³-3.3g/cm³。

4. The method for preparing kinds of permanent magnetic ferrite tiles according to claim 1, wherein the sintering in step (5) is carried out by placing the green compact into a furnace body for high temperature sintering, controlling the sintering temperature to 1150-1200 ℃ and the sintering time to 1.8-2 h.

5. The method for preparing kinds of permanent magnetic ferrite magnetic tiles according to claim 4, characterized in that the green compact is cooled by rapid quenching after sintering.

Technical Field

The invention relates to the field of magnetic shoes, in particular to a preparation method of permanent magnetic ferrite magnetic shoes.

Background

The permanent magnetic ferrite anisotropic sintered magnetic shoe is made of a plurality of permanent magnetic materials, the best cost performance is -inch permanent magnetic materials with the highest use amount and the highest production capacity in the world at present, -inch permanent magnetic materials are widely applied to motors such as exciters, auxiliary exciters and airplanes, small soft drive and hard drive motors such as those used in computers, motors in information products, electric bicycle motors and automobile motors, and a plurality of motors are required to work under the conditions of high and low temperature, vibration, impact and direct current magnetic field interference.

Disclosure of Invention

The invention aims to provide permanent magnetic ferrite magnetic tiles with improved comprehensive performance aiming at the defects of the prior art.

The technical scheme is that the preparation method of permanent magnetic ferrite magnetic shoes is characterized by comprising the following steps:

(1) mixing 10-20 parts of ferric oxide, 2-10 parts of cerium oxide and 4-6 parts of soda, and then putting the mixture into a ball mill for ball milling until the particle size is below 1.5-1.8 um;

(2) adding water into the ground granular materials, stirring, pressing into blocks, placing into a furnace body, and firing at a high temperature, wherein the firing temperature is controlled to be 1300-1350 ℃, the firing time is 3.5-4.5 h, and the propelling speed is 35-45min per plate;

(3) crushing the block material to a particle size of 2.8-3.5 um, adding 2-6 parts of boric acid, 1-3 parts of lanthanum oxide, 6-10 parts of chromium oxide, 2-8 parts of aluminum silicate fiber, 1-6 parts of zinc oxide and 2-6 parts of talcum powder, and uniformly mixing;

(4) putting the uniformly mixed material into a ball mill for secondary grinding, and dehydrating the slurry after grinding to the particle size of 1-1.5 um, wherein the water content is controlled to be 32-34%;

(5) and pressing the dehydrated material into a blank, sintering, and grinding to obtain the permanent magnetic ferrite magnetic shoe product.

Wherein said pressing into a blank in step (5) is specifically operative to: injecting the slurry into a grinding tool, and preparing into a green body under the pressure of 20-21 MPa.

Wherein the green body has a density of 3.1g/cm³-3.3g/cm³。

Wherein, the sintering operation in the step (5) is as follows: and (3) placing the green body into a furnace body for high-temperature sintering, wherein the sintering temperature is controlled to be 1150-1200 ℃, and the sintering time is 1.8-2 h.

Wherein, the green body is cooled by a rapid quenching method after being sintered.

Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: the invention is a brand new method aiming at the preparation design of the permanent magnetic ferrite magnetic shoe, and effectively improves the comprehensive performance of the magnetic shoe. Moreover, the preparation method is simple to operate and convenient to apply.

Detailed Description

The technical solution of the present invention is further described in step with reference to the specific embodiments.