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Preparation process of silicon nitride ceramic material for water seal of water pump

A silicon nitride ceramic and a preparation process technology are applied in the field of silicon nitride ceramic materials to achieve the effects of uniform structure, good wear resistance and improved toughening effect

Inactive Publication Date: 2014-10-01
安徽安尔达机电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing silicon nitride ceramic materials are increasingly unable to meet the needs of high-speed development. How to prepare a ceramic material with high density, good strength, good wear resistance and excellent heat resistance has become a technical problem that needs to be solved at present.

Method used

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  • Preparation process of silicon nitride ceramic material for water seal of water pump

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation process of a silicon nitride ceramic material for a water pump water seal, comprising the steps of:

[0025] S1. Weigh 70 parts of silicon nitride, 18 parts of talc powder, 20 parts of silicon carbide superfine powder, 4 parts of barium carbonate powder and 1.5wt% absolute ethanol based on silicon carbide and mix evenly, then add 3 parts Zirconium dioxide and 0.5 parts of titanium dioxide are fully ground and sent to the spray tower for spray granulation to obtain the first material, wherein silicon carbide superfine powder includes silicon carbide superfine powder with a particle size of 5-10 μm, accounting for 85%, and a particle size of 15 μm. -30μm ultrafine silicon carbide powder accounts for 10%, and silicon carbide ultrafine powder with a particle size of 40-60μm accounts for 5%;

[0026] S2. Sending the first material into a high-temperature furnace for calcination and oxidation at 1200° C. for 6 hours, and then pulverizing it in a vibration mill t...

Embodiment 2

[0031] A preparation process of a silicon nitride ceramic material for a water pump water seal, comprising the steps of:

[0032] S1, take by weight 85 parts of silicon nitride, 10 parts of talcum powder, 23 parts of silicon carbide superfine powder, 2 parts of barium carbonate powder and 3wt% dehydrated alcohol based on silicon carbide and mix evenly, then add 2 parts of two Zirconia and 1.5 parts of titanium dioxide are fully ground and sent to the spray tower for spray granulation to obtain the first material, in which silicon carbide superfine powder includes silicon carbide superfine powder with a particle size of 5-10 μm, accounting for 70%, and a particle size of 15-10 μm. 30μm ultrafine silicon carbide powder accounts for 20%, and silicon carbide ultrafine powder with a particle size of 40-60μm accounts for 10%;

[0033] S2. Sending the first material into a high-temperature furnace for calcination and oxidation at 1000° C. for 8 hours, and then pulverizing it in a vib...

Embodiment 3

[0038] A preparation process of a silicon nitride ceramic material for a water pump water seal, comprising the steps of:

[0039] S1. Weigh 80 parts of silicon nitride, 15 parts of talc powder, 20 parts of silicon carbide superfine powder, 3 parts of barium carbonate powder and 2.5wt% absolute ethanol based on silicon carbide and mix them evenly, then add 2.8 parts Zirconium dioxide and 1.3 parts of titanium dioxide are fully ground and sent to the spray tower for spray granulation to obtain the first material, wherein the silicon carbide superfine powder comprises 80% of the silicon carbide superfine powder with a particle size of 5-10 μm, and the particle size is 15 μm. -30μm ultrafine silicon carbide powder accounts for 10%, and silicon carbide ultrafine powder with a particle size of 40-60μm accounts for 10%;

[0040] S2. Sending the first material into a high-temperature furnace for calcination and oxidation at 1100° C. for 7 hours, and then pulverizing it in a vibration ...

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Abstract

The invention discloses a preparation process of a silicon nitride ceramic material for water seal of a water pump. The preparation process comprises the following steps: uniformly mixing silicon nitride, talcum powder, silicon carbide superfine powder, barium carbonate powder and absolute ethyl alcohol, adding zirconium dioxide and titanium dioxide, completely grinding, and implementing spray granulation in a spray tower to obtain a first material; calcining and oxidizing in a high-temperature furnace at 1000-1200 DEG C for 6-8h, and grinding in a vibrating grinder to obtain a second material which is 3000-4000 meshes in granularity; adding polyvinyl alcohol to the second material obtained, and pressurizing and molding in isostatic pressing equipment under pressure of 1.2-1.6 tons per square meter to obtain a third material; implementing heat-pressing treatment to obtain a fourth material, wherein calcining temperature of the high-temperature furnace is 1250-1350 DEG C, heat-pressing treatment duration is 7-8h and calcining pressure is 100,000-150,000kg / m<2>; and grinding, slicing and shaping to obtain the silicon nitride ceramic material for water seal of the water pump.

Description

technical field [0001] The invention relates to the technical field of silicon nitride ceramic materials, in particular to a preparation process of a silicon nitride ceramic material for a water pump water seal. Background technique [0002] Silicon nitride ceramics are an important structural material. It is a superhard substance, an inorganic material that does not shrink during sintering, has lubricity itself, and is wear-resistant; except for hydrofluoric acid, it does not react with other inorganic acids, has strong corrosion resistance, and resists oxidation at high temperatures. Moreover, it can also resist cold and heat shocks, and it will not shatter when heated to above 1000°C in the air, cooled rapidly and heated again sharply. It is precisely because silicon nitride ceramics have such excellent characteristics that people often use it to manufacture ceramic materials for small gasoline engine water pump water seals. With the use of silicon nitride ceramic mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/584C04B35/622C04B35/63C04B35/634
Inventor 吴甲亭
Owner 安徽安尔达机电有限公司
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