CN1622224A

CN1622224A - Conductive paste

Info

Publication number: CN1622224A
Application number: CN 200310105772
Authority: CN
Inventors: 刘金利
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-11-30
Filing date: 2003-11-30
Publication date: 2005-06-01

Abstract

The present invention relates to conducting paste, and is especially one kind of non-metal conducting paste. The technological scheme is that the non-metal conducting paste consists of well conductive graphite, carbon fiber or graphite fiber as the conducting carrier, adhesive, curing agent and stuffing through combination at certain temperature. The adhesive may be of resin or oil; the curing agent may be ethylene diamine, cobalt oxide or potassium permanganate; and the stuffing may be carbon powder. The non-metal conducting paste has the features of high conductivity, good heat radiating performance, high temperature resistance, corrosion resistance, self lubrication and non-magnetism.

Description

A kind of conductive paste

One, technical field: the present invention relates to a kind of conductive paste, particularly a kind of nonmetal conductive paste.

Two, background technology: present existing conductive paste all is to be that aluminium powder and other metal powder add the conductive paste that a certain amount of chemical substance is made with metal particle (powder).This conductive paste detects not conducting with universal instrument under the effect that does not have external force, only just conducting under the effect of external force is so be to belong to neutral conductive paste.This conductive paste is owing to adopt metal dust as conductive carrier, thus exist than great, cost is high, and along with the rising of temperature, the shortcoming that resistance increases.

Three, summary of the invention: the purpose of this invention is to provide and a kind ofly all have excellent conducting performance under external force with under the free position, have antiseptic property and descend with temperature rising resistance, electric conductivity is good more, the Remarkable Energy Saving conductive paste.

Technical scheme of the present invention is to adopt the graphite with excellent conductive performance, and carbon fiber or graphitized filamentary material add adhesive, the nonmetal conductive paste that curing agent and compound stir at a certain temperature and constitute as conductive carrier.According to the difference of purposes, various component proportions are also different.It consists of: a, 60-120 order graphite powder accounts for 35-85%, b, length is the carbon fiber or the graphite fibre of 0.05-4 millimeter, 0.5-25%, c, adhesive 64.5-10% stirs under the situation of 30-100 degree and gets final product, perhaps adopt: d, 60-120 order graphite powder accounts for 35-65%, e, length is the carbon fiber or the graphite fibre 0.5-25% of 0.05-4 millimeter, f, adhesive 64-7%, g, curing agent 0.1-1%, h, compound 0.4-2%, stirring under the situation of 30-100 degree gets final product, the adhesive that adopts can be selected resinae and grease for use, class all can, curing agent can be selected ethylenediamine for use, cobalt oxide, potassium permanganate, compound can be selected the carbon foam for use.

The present invention is because to adopt graphite, carbon fiber or graphite fibre be conductive carrier, this material have conduction well, good heat dissipation, high temperature resistant, corrosion-resistant, self-lubricating, nonmagnetic characteristics.And graphite powder in conductive paste in pelletized form, carbon fiber or graphite fibre are needle-like in conductive paste, they form extruding mutually, the conductive chain that contacts with each other with after adhesive, curing agent and additive mix.Because acicular substance is that cross-lapping and space are filled and made original conductive chain become the favorable conductive thing anyhow at granular material, adds that the electric conductivity of the external force effect conductive paste when using is more obvious.Because carbon and graphite itself have high temperature resistant and the resistance temperature negative characteristic, serviceability temperature can be manufactured according to service condition.So the present invention has and conducts electricity very well, advantage such as high temperature resistant, corrosion-resistant, resistance temperature negative characteristic.

The bus that the present invention is suitable for a secondary of range transformer connects partly various leads, bus, busbar, different metal lead, bus coupling part.Various slip contact portions (open-air rainproof, the snow defence that uses, anti-freezing effect).Various electric furnaces, burner coupling part.Various electric switches, disconnecting link.Automatic switch, contactor, relay, storage battery, contact button, electronic component socket contact portion.Conductive paste has the increase contact area to above contact portion, reduces contact resistance, increases the go out orphan and the ducting capacity of various contactors, switch.Prevent oxidation of electrically conductive contact portion and corrosion, reduce the circuit electric energy loss.Prevent the tangible effect that has of electric equipment and circuit accident.Thereby improve the security reliability of electric equipment, reduce the maintenance number of times and the expense of electric equipment, prolong the life-span of electric equipment, reach energy-saving safe, have tangible economic benefit and social benefit.The present invention is specially adapted on the big electric equipment of the various power consumptions of industries such as metallurgy, petrochemical industry, mine traffic, and effect is more remarkable.

Four, description of drawings: do not have

Five, specific embodiment:

Embodiment 1:

With the 80 order graphite powders of 450 grams and the length of 100 grams is that 2 millimeters carbon fiber mixes, heat after again the resins (as epoxide resin) of the vaseline of 400 grams and 50 grams being mixed behind the 50-80 degree, graphite and carbon fiber mixture are added to stir get final product.

Embodiment 2:

With the 80 order graphite powders of 350 grams and the length of 200 grams is that 3 millimeters graphite fibres mix, and heats behind the 50-80 degree after the mixed with resin with 300 gram vaseline and 150 grams again, the mixture of graphite powder and graphite fibre is added to stir get final product.

Embodiment 3:

With 500 gram 120 purpose graphite carbon dusts and 5 gram length is that 0.1 millimeter carbon fiber mixes, again 470 gram vaseline and 5 grams are heated after the mixed with resin behind the 50-80 degree, graphite powder and carbon fiber mixture are added to stir with 100 order carbon foams of 20 grams get final product.

Embodiment 4:

With 300 the gram 100 order graphite powders and 200 the gram length be 0.1 millimeter carbon fiber with 10 the gram 100 order carbon foams stir, again the vaseline of 280 grams and the mixed with resin of 150 grams are heated behind the 50-80 degree, again graphite powder and carbon fiber, carbon foam mixture are added stir after, again the ethylenediamines of 10 grams are added to stir and get final product.

Claims

1, a kind of conductive paste is characterized in that comprising that graphite, carbon fiber or graphite fibre, binder combination constitute, and its percentage by weight is graphite 35-65%; Carbon fiber or gypsum fiber 0.5-25%; Binder constitutes 10-64.5%.

2, according to the described conductive paste of claim 1, it is characterized in that also comprising curing agent and compound, its percentage by weight is graphite 35-65%; Carbon fiber or gypsum fiber 0.5-25%; Binder constitutes 7-64%; Curing agent 0.1-1%; Compound 0.4-2%.

3, according to the described conductive paste of claim 1, it is characterized in that described adhesive can select resinae and oils for use, said curing agent can be selected ethylenediamine, oxidation brill, potassium permanganate for use, and compound can be selected the carbon foam for use.