Anti-oxidation graphite tube with high lubrication performance

A lubricating performance, graphite tube technology, applied in the field of anti-oxidation graphite tube, to achieve the effect of prolonging the effective use time, good working life, and increasing the application temperature range

Inactive Publication Date: 2015-02-11
QINGDAO GUANGXING ELECTRONICS MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005]Existing graphite tubes have problems such as foaming, cracks, and bursts, and the working performance and working life are not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Raw material pretreatment: add 15 parts of refractory clay, 5 parts of borax, 5 parts of boric acid, 5 parts of molybdenum disulfide, 5 parts of nanometer aluminum oxide, add 100 parts of water and stir at room temperature for 50 minutes;

[0030] (2) Batching molding: mix 50 parts of graphite powder, 10 parts of medium-temperature asphalt, 5 parts of composite dispersant synthesized by sodium dodecylsulfonate and fatty acid sorbitan in a ratio of 1:1 with the above mixture, and put Extrusion molding in molding die;

[0031] (3) Roasting: Put the molded tube into the roasting furnace, set the temperature at 135°C, react for 35 minutes, pass in nitrogen or argon, heat up to 1140°C, react for 3 minutes, and quickly cool down to 760°C;

[0032] (4) Impregnation: Control the temperature of the calcined formed tube at 140°C, dry it for 24 hours, put it into polyvinyl acetal and dip it for 7 hours, then control the temperature at 140°C, and heat-treat it for 13 hours to...

Embodiment 2

[0034] (1) Raw material pretreatment: add 15 parts of fireclay, 5 parts of borax, 3 parts of boric acid, 2 parts of molybdenum disulfide, 5 parts of nano-alumina, add water 80-200% and stir at room temperature for 50-80min;

[0035] (2) Batching molding: mix 50 parts of graphite powder, 10 parts of medium temperature asphalt, 10 parts of composite dispersant synthesized by sodium dodecylsulfonate and fatty acid sorbitan at a ratio of 1:1 with the above mixture, and put in Extrusion molding in molding die;

[0036] (3) Roasting: Put the molded tube into the roasting furnace, set the temperature at 145°C, react for 40 minutes, pass in nitrogen or argon, heat up to 1160°C, react for 5 minutes, and quickly cool down to 780°C;

[0037] (4) Impregnation: Control the temperature of the roasted formed tube at 150°C, dry it for 26 hours, put it into polyvinyl acetal for 8 hours, then control the temperature at 150°C, and heat-treat it for 15 hours to obtain the finished product.

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Abstract

The invention discloses an anti-oxidation graphite tube with a high lubrication performance. The graphite tube comprises, by weight, 50-60 parts of graphite powder, 10-15 parts of asphalt, 10-15 parts of fire clay, 5-8 parts of borax, 3-5 parts of boric acid, 2-5 parts of molybdenum disulfide, 3-5 parts of nanometer alumina and 5-10 parts of a composite dispersant. A making method of the graphite tube comprises the steps of pretreatment of raw materials, burdening forming, roasting and dipping. Molybdenum disulfide, the nanometer alumina and the composite dispersant are added to realize automatic repairing of damaged surfaces of an apparatus in order to improve the application temperature range and the lubrication effect. Effective components are added to prolong the effective service time of graphite and graphite-containing products and realize synergism and consumption reduction effects. The graphite tube made in the invention has no bubble, crack or burst problems, has good work performances and work life, has no pollution to the environment, and is suitable for industrial production.

Description

Technical field: [0001] The invention relates to an oxidation-resistant graphite tube with high lubricating performance. Background technique: [0002] Graphite is widely used in metallurgical refractory products because its refractoriness can reach above 3500°C and it is not corroded by acid and alkali. The only disadvantage of carbon-bonded graphite and graphite-containing products at high temperatures is that they are not resistant to oxidation. In order to overcome the disadvantages of making tripods that are not resistant to oxidation, many manufacturers have researched and developed various antioxidants to meet this need. Adding aluminum powder and silicon powder to the product can have a certain anti-oxidation effect. How to keep the surface of carbon-containing products that only come into contact with the air from being oxidized at high temperatures, thereby prolonging the service life of the products, reducing the cost of users, and increasing the economic bene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/528C04B35/622C04B41/85
Inventor 王志敏刘天云
Owner QINGDAO GUANGXING ELECTRONICS MATERIALS
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