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Boron carbide ceramic ball and preparation method thereof

A boron carbide ceramic and boron carbide technology are applied in the field of boron carbide ceramic balls and their preparation, which can solve the problems of long processing cycle and unsuitability for mass production, and achieve the effects of promoting wide application, precision production and improving production efficiency

Active Publication Date: 2019-03-15
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can achieve the processing accuracy of ceramic balls up to G3 level, but the process cycle is too long, it is not suitable for the needs of mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of preparation method of boron carbide ceramic ball of the present invention, comprises the following steps:

[0025] (1) In parts by mass, weigh the following raw materials:

[0026] Boron carbide powder: 100 parts

[0027] Carbon black powder: 3 parts

[0028] Surfactant A: 1 part

[0029] Sintering aid: 7 parts

[0030] Binder: 0.5 parts

[0031] Surfactant B: 1 part

[0032] High polymer binder: 30 parts

[0033] In this embodiment, boron carbide powder D 50 ≤0.8μm, maximum particle size ≤3μm, specific surface area 15m 2 / g; the average particle size of carbon black powder is 20nm, and the specific surface area is 120m 2 / g; sintering aid is TiO 2 with Al 2 o 3 The combination of powder, the mass percentage is 3:1; surfactant A and surfactant B are stearic acid; binder is water-based phenolic resin; polymer binder is paraffin wax, high-density polyethylene and ethylene-acetic acid The combination of ethylene copolymers, the mass percentage is 3:1:...

Embodiment 2

[0038] (1) In parts by mass, weigh the following raw materials:

[0039] Boron carbide powder: 100 parts

[0040] Carbon black powder: 3 parts

[0041] Surfactant A: 1 part

[0042] Sintering aid: 6 parts

[0043] Binder: 0.5 parts

[0044] Surfactant B: 1 part

[0045] High polymer binder: 30 parts

[0046] In this embodiment, boron carbide powder D 50 ≤0.8μm, maximum particle size ≤3μm, specific surface area 15m 2 / g; the average particle size of carbon black powder is 20nm, and the specific surface area is 120m 2 / g; sintering aid is TiO 2 with Al 2 o 3 The combination of powder, the mass percentage is 3:1; surfactant A and surfactant B are stearic acid; binder is water-based phenolic resin; polymer binder is paraffin wax, high-density polyethylene and ethylene-acetic acid The combination of ethylene copolymers, the mass percentage is 3:1:1.

[0047] (2) Use boron carbide powder and carbon black powder as the main raw materials, add deionized water, surfactant A, ...

Embodiment 3

[0051] (1) In parts by mass, weigh the following raw materials:

[0052] Boron carbide powder: 100 parts

[0053] Carbon black powder: 4 parts

[0054] Surfactant A: 1 part

[0055] Sintering aid: 5 parts

[0056] Binder: 0.5 parts

[0057] Surfactant B: 1 part

[0058] High polymer binder: 30 parts

[0059] In this embodiment, boron carbide powder D 50 ≤0.8μm, maximum particle size ≤3μm, specific surface area 15m 2 / g; the average particle size of carbon black powder is 20nm, and the specific surface area is 120m 2 / g; sintering aid is TiO 2 with Al 2 o 3 The combination of powder, the mass percentage is 3:1; surfactant A and surfactant B are stearic acid; binder is water-based phenolic resin; polymer binder is paraffin wax, high-density polyethylene and ethylene-acetic acid The combination of ethylene copolymers, the mass percentage is 3:1:1.

[0060] (2) Use boron carbide powder and carbon black powder as the main raw materials, add deionized water, surfactant A...

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Abstract

The invention relates to a boron carbide ceramic ball and a preparation method thereof. The preparation method comprises the following steps: (1) performing spray granulation on boron carbide powder,carbon black powder, a surfactant A, a sintering aid and a binder to obtain boron carbide granulating powder; (2) heating and stirring the boron carbide granulating powder obtained in the step (1), asurfactant B and a high polymer binder, mixing and crushing to obtain injected granules; (3) performing injection molding on the injected granules obtained in the step (2) to obtain a spherical greenbody, degreasing and sintering the obtained spherical green body to obtain the boron carbide ceramic ball. Compared with the prior art, the preparation method has the advantages that the boron carbideceramic ball with relatively high degree of sphericity can be prepared, a prepared material used in the grinding process is small, the efficiency is high, and the production cost can be better saved.

Description

technical field [0001] The invention relates to a ceramic ball and a preparation method thereof, in particular to a boron carbide ceramic ball and a preparation method thereof. Background technique [0002] Boron carbide (B 4 C) It is an advanced structural ceramic material whose hardness is only lower than that of diamond and cubic boron nitride. With its high hardness, low density, good chemical stability and high neutron absorption capacity, it is widely used in nuclear industry, chemical industry and aviation. Aerospace and protection fields have broad application prospects. Based on the above advantages, boron carbide ceramic balls have broad application prospects as key components of protection, grinding, ceramic bearings, and ball valves in harsh service environments such as high strength, high hardness, acid and alkali corrosion resistance, and impact resistance. [0003] The production of boron carbide ceramic balls has not been able to achieve mass production, ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/563
CPCC04B35/563C04B2235/424C04B2235/3232C04B2235/3217C04B2235/6581
Inventor 史秀梅曹剑武张立君李志鹏杨亚璋陈刚倪杨郑阳升
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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