CN104392766A - High-hardness conductive silver paste containing chromium powders and manufacturing method thereof - Google Patents

Abstract

The invention discloses a high-hardness conductive silver paste containing chromium powders. The conductive silver paste is characterized in that the paste comprises the following raw materials: 35 to 45 parts by weight of silver powders, 5 to 8 parts by weight of iron powders, 4 to 7 parts by weight of chromium powders, 3 to 6 pats by weight of attapulgite, 2 to 3 parts by weight of waste engine oil, 1.2 to 3.4 parts by weight of stannous sulfate, 0.5 to 0.9 parts by weight of sodium carbonate, 1.1 to 2.4 parts by weight of potassium titanate, 2.1 to 3.4 parts by weight of urea, 2.4 to 3.6 parts by weight of monoammonium phosphate, 1.3 to 3.4 parts by weight of polymeric ferric sulfate, 2.1 to 4,2 parts by weight of tetradecyl trimethyl ammonium chloride, 3o to 40 parts by weight of auxiliary agents, and the proper amount of water. Compared with the prior art, the high-hardness conductive silver paste has the following beneficial effects: a conductive silver circuit that is obtained by drying the silver paste has the excellent anti-bending performance; the silk-screen printing performance is good; the surface hardness is high; the corrosion-resistant performance is good; and the environment service life is long. And the process requirement of the notebook computer keyboard production can be completely met.

Description

A kind of high rigidity conductive silver paste adding chromium powder and preparation method thereof

 

Technical field

The present invention relates to conductive silver paste field, be specifically related to a kind of high rigidity conductive silver paste adding chromium powder and preparation method thereof.

Background technology

Conductive silver paste refers to and is printed on conduction stock, make it the silver slurry that there is conduction current and get rid of accumulate static charge ability, be generally be imprinted on the non-conductive stocks such as plastics, glass, pottery or cardboard, it is made up of electroconductive stuffing, binder, solvent and additive.Conductive silver paste needs the characteristic possessed to have: conductivity (antistatic behaviour) is good, strong adhesion, printing adaptability are good and solvent resistance superior properties, and existing conductive silver paste has a lot of shortcoming in the market, not only containing lead, cadmium etc. and poisonous, contaminated environment, and when being used on conduction stock, adhesive force is low, soldering resistance is not good, sintering character is poor.

Summary of the invention

Object of the present invention is just to provide a kind of high rigidity conductive silver paste adding chromium powder and preparation method thereof, to overcome the deficiencies in the prior art.

The object of the present invention is achieved like this:

A kind of high rigidity conductive silver paste adding chromium powder, it is characterized in that, be made up of the raw material of following weight portion: silver powder 35-45, iron powder 5-8, chromium powder 4-7, attapulgite 3-6, used oil 2-3, stannous sulfate 1.2-3.4, sodium carbonate 0.5-0.9, potassium titanate 1.1-2.4, urea 2.1-3.4, MAP 2.4-3.6, bodied ferric sulfate 1.3-3.4, tetradecyl trimethyl ammonium chloride 2.1-4.2, auxiliary agent 30-40, suitable quantity of water.

Described auxiliary agent is made up of following raw materials in part by weight: zirconium dioxide 0.3-0.5, nickel oxide 1-3, white carbon 1-3, polymethacrylates 0.3-0.6, Tissuemat E 0.4-0.8, DGDE acetate 5-8, polysiloxanes 0.2-0.3, polyethylene glycol 9-13, its preparation method is that zirconium dioxide, nickel oxide are put into calciner and calcine 1-2 hour at 540-650 DEG C, taking-up is cooled to room temperature, adds white carbon grinding 20-40 minute; DGDE acetate, polyethylene glycol are stirred and evenly mixed, at 150-185 DEG C, reacts 2-3 hour, be cooled to 75-85 DEG C, add polymethacrylates, Tissuemat E, polysiloxanes, keep temperature to stir 3-4 hour; By above each product mixing, grind 2-4 hour obtained 300-400 order slurry and get final product.

Described a kind of preparation method adding the high rigidity conductive silver paste of chromium powder, is characterized in that comprising the following steps:

(1) get attapulgite, bodied ferric sulfate, stannous sulfate add suitable quantity of water grinding 2-3 hour pulping, granulation, puts into calciner and sinter 2-3 hour at 650-710 DEG C, takes out cooling, sprays into vaporific used oil;

(2) get potassium titanate, MAP puts into reactor and be heated to melting, add sodium carbonate, urea, tetradecyl trimethyl ammonium chloride stir 30-40 minute to mixing, grind 2-3 hour pulping;

(3) step (1), (2) reaction mass and other leftover materials are mixed, be warming up to 100-120 DEG C, stirring reaction 1-2 hour, cooling, grinding to form particle diameter is 10-20 μm of slurry grain, to obtain final product.

The present invention has following beneficial effect: compared with prior art, silver slurry of the present invention dry after the conductive silver circuit that obtains there is the performances such as preferably bend resistance performance, preferably screen printability, case hardness are strong, corrosion resistance, environment long service life, be suitable for the technological requirement of keyboard of notebook computer production completely.

Embodiment

Described a kind of high rigidity conductive silver paste adding chromium powder, it is characterized in that, be made up of the raw material of following weight portion: silver powder 38, iron powder 8, chromium powder 4, attapulgite 5, used oil 3, stannous sulfate 1.6, sodium carbonate 0.5, potassium titanate 1.7, urea 2.7, MAP 2.9, bodied ferric sulfate 3.4, tetradecyl trimethyl ammonium chloride 2.6, auxiliary agent 30, suitable quantity of water.

Described auxiliary agent is made up of following raw materials in part by weight: zirconium dioxide 0.4, nickel oxide 1, white carbon 2, polymethacrylates 0.5, Tissuemat E 0.7, DGDE acetate 8, polysiloxanes 0.2, polyethylene glycol 13, its preparation method is that zirconium dioxide, nickel oxide are put into calciner and calcine 1-2 hour at 540-650 DEG C, taking-up is cooled to room temperature, adds white carbon grinding 20-40 minute; DGDE acetate, polyethylene glycol are stirred and evenly mixed, at 150-185 DEG C, reacts 2-3 hour, be cooled to 75-85 DEG C, add polymethacrylates, Tissuemat E, polysiloxanes, keep temperature to stir 3-4 hour; By above each product mixing, grind 2-4 hour obtained 300-400 order slurry and get final product.

Manufacture method comprises the following steps:

(1) get attapulgite, bodied ferric sulfate, stannous sulfate add suitable quantity of water grinding 2-3 hour pulping, granulation, puts into calciner and sinter 2-3 hour at 650-710 DEG C, takes out cooling, sprays into vaporific used oil;

(2) get potassium titanate, MAP puts into reactor and be heated to melting, add sodium carbonate, urea, tetradecyl trimethyl ammonium chloride stir 30-40 minute to mixing, grind 2-3 hour pulping;

(3) step (1), (2) reaction mass and other leftover materials are mixed, be warming up to 100-120 DEG C, stirring reaction 1-2 hour, cooling, grinding to form particle diameter is 10-20 μm of slurry grain, to obtain final product.

The technical indicator of being processed the conductive silver paste obtained by above-described embodiment is as follows:

(1) viscosity: 50-100PaS(Brookfield, 10RPM);

(2) adhesive force: > 10N/mm ²;

(3) sheet resistance: < 5m Ω/c;

(4) plumbous cadmium content: < 100ppm.

Claims (2)

1. one kind is added the high rigidity conductive silver paste of chromium powder, it is characterized in that, be made up of the raw material of following weight portion: silver powder 35-45, iron powder 5-8, chromium powder 4-7, attapulgite 3-6, used oil 2-3, stannous sulfate 1.2-3.4, sodium carbonate 0.5-0.9, potassium titanate 1.1-2.4, urea 2.1-3.4, MAP 2.4-3.6, bodied ferric sulfate 1.3-3.4, tetradecyl trimethyl ammonium chloride 2.1-4.2, auxiliary agent 30-40, suitable quantity of water; Described auxiliary agent is made up of following raw materials in part by weight: zirconium dioxide 0.3-0.5, nickel oxide 1-3, white carbon 1-3, polymethacrylates 0.3-0.6, Tissuemat E 0.4-0.8, DGDE acetate 5-8, polysiloxanes 0.2-0.3, polyethylene glycol 9-13, its preparation method is that zirconium dioxide, nickel oxide are put into calciner and calcine 1-2 hour at 540-650 DEG C, taking-up is cooled to room temperature, adds white carbon grinding 20-40 minute; DGDE acetate, polyethylene glycol are stirred and evenly mixed, at 150-185 DEG C, reacts 2-3 hour, be cooled to 75-85 DEG C, add polymethacrylates, Tissuemat E, polysiloxanes, keep temperature to stir 3-4 hour; By above each product mixing, grind 2-4 hour obtained 300-400 order slurry and get final product.

2. a kind of manufacture method of adding the high rigidity conductive silver paste of chromium powder according to claim 1, is characterized in that comprising the following steps:

(1) get attapulgite, bodied ferric sulfate, stannous sulfate add suitable quantity of water grinding 2-3 hour pulping, granulation, puts into calciner and sinter 2-3 hour at 650-710 DEG C, takes out cooling, sprays into vaporific used oil;

(2) get potassium titanate, MAP puts into reactor and be heated to melting, add sodium carbonate, urea, tetradecyl trimethyl ammonium chloride stir 30-40 minute to mixing, grind 2-3 hour pulping;

(3) step (1), (2) reaction mass and other leftover materials are mixed, be warming up to 100-120 DEG C, stirring reaction 1-2 hour, cooling, grinding to form particle diameter is 10-20 μm of slurry grain, to obtain final product.