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Environment-friendly graphite resistance paste and preparation method thereof

A graphite resistor, an environmentally friendly technology, applied in the direction of heating element materials, etc., can solve the problems that the resistance slurry is harmful to the human body, the stability of the mica board is poor, and the matching of the mica board is poor.

Inactive Publication Date: 2010-10-20
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] It can be seen from the above that the quality of the resistance paste plays a vital role in heating equipment. The resistance paste is mainly composed of a conductive phase and an adhesive phase, and the adhesive phase is mainly lead-containing glass. The resistance paste prepared by the phase is harmful to the human body. Of course, there are also lead-free glass as the bonding phase of the resistance paste. The stability of the mica board prepared by the material is poor; in addition, because the square resistance of the resistance slurry is a fixed value, it cannot well meet the requirements of different power

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Preparation of lead-free glass powder: weigh 60% of Bi according to weight percentage 2 o 3 , 20% of B 2 o 3 , 10% SiO 2 , 4% Al 2 o 3 , 3% TiO 2 , 2% of V 2 o 5 , and 1% Sb 2 o 3 , grind it into powder and pass through a 80-mesh sieve, then mix it evenly in a mixer and put it in a mortar, then transfer it to a high-temperature resistance furnace, keep it at 900°C for 30 minutes, and then take it out and immerse it in cold water for water Quenching to obtain glass slag, then put the above-mentioned obtained glass slag into a ball mill and mill for 4 hours to form glass powder, and finally pass the ball-ground glass powder through 400 sieves, then dry to obtain lead-free glass powder for use.

[0026] 2) Preparation of organic vehicle: Weigh 85% terpineol, 10% ethyl cellulose, 0.2% diethanolamide monoglyceride stearate as a surfactant, and 3.5% as a leveling agent according to weight percentage The polydimethylsiloxane and 1.3% polyethyl ether modified silo...

Embodiment 2

[0029] 1) Preparation of lead-free glass powder: take 62% Bi by weight percentage 2 o 3 , 15% of B 2 o 3 , 13% SiO 2 , 2.5% Al 2 o 3 , 2% TiO 2 , 5% of V 2 o 5 , and 0.5% Sb 2 o 3 , grind it into powder and pass through 80-mesh sieve, mix it evenly in a mixer, put it in a mortar, transfer it to a high-temperature resistance furnace, keep it at 930°C for 30 minutes, and then take it out and immerse it in cold water for water quenching , to obtain glass slag, then put the glass slag obtained above into a ball mill and ball mill for 4 hours to become glass powder, and finally pass the ball-ground glass powder through 400 sieves, then dry to obtain lead-free glass powder for use.

[0030] 2) Preparation of organic vehicle: weigh 85% of terpineol, 8% of ethyl cellulose, 1% of nonylphenol polyoxyethylene as a surfactant, and 5% of polyformaldehyde as a leveling agent according to weight percentage. Phenyl phenyl siloxane, and 1% polyether modified siloxane as a defoaming ...

Embodiment 3

[0033] 1) Preparation of lead-free glass powder: Weigh 65% Bi 2 o3 , 17% of B 2 o 3 , 5% SiO 2 , 3% Al 2 o 3 , 1% TiO 2 , 4% of V 2 o 5 , and 5% Sb 2 o 3 , grind it into powder and pass through 80-mesh sieve, mix it evenly in a mixer, put it in a mortar, transfer it to a high-temperature resistance furnace, keep it at 950°C for 30 minutes, and then take it out and immerse it in cold water for water quenching , to obtain glass slag, then put the glass slag obtained above into a ball mill and ball mill for 4 hours to become glass powder, and finally pass the ball-ground glass powder through 400 sieves, then dry to obtain lead-free glass powder for use.

[0034] 2) Preparation of organic vehicle: Weigh 86.5% terpineol, 7.5% ethyl cellulose, 5% fatty alcohol polyoxyethylene ether as surfactant, 0.5% organic base as leveling agent according to weight percentage Modified polysiloxane, and 0.5% polyether modified siloxane as a defoaming agent, put them in a beaker, react in...

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Abstract

The invention provides environment-friendly graphite resistance paste and a preparation method thereof. The resistance paste comprises the following components by weight percent: 50-70% of conductive phase graphite powder, 5-30% of bonding-phase lead-free glass powder, 10-30% of organic carriers and an external additive used for adjusting the square resistance of the resistance paste, wherein the lead-free glass powder adopts the Bi-B-Si-Sb system; the organic carriers comprise organic solvents and additives; and the additives account for 0.1-8% of the total weight of the lead-free glass powder and the graphite powder. Besides, the resistance paste also comprises appropriate amount of external additive Al2O3, therefore, the resistance of the resistance paste can be adjusted according to different requirements to meet the requirements of all kinds of power.

Description

technical field [0001] The invention relates to a resistance slurry and a preparation method thereof, in particular to an environment-friendly graphite resistance slurry and a preparation method thereof. Background technique [0002] In colder regions, heating equipment is almost universally used in every household, and its types are also varied. With the continuous development of science and technology, a new type of heating equipment has appeared at present, which is to coat the configured resistance slurry on the mica board, thereby heating through the heating of the resistance slurry. [0003] It can be seen from the above that the quality of the resistance paste plays a vital role in heating equipment. The resistance paste is mainly composed of a conductive phase and an adhesive phase, and the adhesive phase is mainly lead-containing glass. The resistance paste prepared by the phase is harmful to the human body. Of course, there are also lead-free glass as the bonding ...

Claims

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Application Information

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IPC IPC(8): H05B3/14
Inventor 蒲永平陈小龙赵新
Owner SHAANXI UNIV OF SCI & TECH
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