CN104143383A - Carbon nano tube conductive silver paste for filter and manufacturing method thereof - Google Patents

Abstract

The invention discloses carbon nano tube conductive silver paste for a filter. The carbon nano tube conductive silver paste is characterized by being composed of the following raw materials, by weight, 40-50 parts of silver powder, 3-4 parts of carbon nano tubes, 1-2 parts of boric oxide, 2.1-3.4 parts of precipitated barium sulphate, 0.4-0.9 part of sodium zirconate, 0.2-0.4 part of a titanate coupling agent, 0.4-0.7 part of sodium diacetate, 1.2-2.3 parts of methylimidazoline, 4-6 parts of ethylene glycol butyl ether, 3-5 parts of acrylic resin, 30-40 parts of assistants and appropriate water. Various effective constituents are combined in an optimized mode, the production process is simplified, and compared with the prior art, implementation and operation are convenient, after a substrate is coated with the carbon nano tube conductive silver paste for the filter and sintered, a silver conductive layer which is high in compactness, high in adhesive force, good in conductive performance and good in weldability is formed, and the market prospects are wide.

Description

Carbon nanotube conducting silver slurry and preparation method thereof for a kind of filter

Technical field

The present invention relates to conductive silver paste field, be specifically related to a kind of filter carbon nanotube conducting silver slurry 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 to be generally imprinted on the non-conductive stocks such as plastics, glass, pottery or cardboard, it is made up of electroconductive stuffing, binder, solvent and additive.The characteristic that conductive silver paste need to possess has: conductivity (antistatic behaviour) is good, strong adhesion, printing adaptability are good and the excellent characteristic of solvent resistance, and existing conductive silver paste has a lot of shortcomings in the market, not only contain lead, cadmium etc. and poisonous, contaminated environment, and use conduction stock on time adhesive force 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 filter carbon nanotube conducting silver slurry and preparation method thereof, to overcome the deficiencies in the prior art.

The object of the present invention is achieved like this:

Carbon nanotube conducting silver slurry for a kind of filter, it is characterized in that, made by the raw material of following weight portion: silver powder 40-50, carbon nano-tube 3-4, boron oxide 1-2, blanc fixe 2.1-3.4, sodium zirconate 0.4-0.9, titanate coupling agent 0.2-0.4, sodium Diacetate 0.4-0.7, methylimidazole quinoline 1.2-2.3, ethylene glycol monobutyl ether 4-6, acrylic resin 3-5, auxiliary agent 30-40, suitable quantity of water.

Described auxiliary agent is made up of following raw materials in part by weight: silica 1-2, zinc oxide 3-4, celluloid 1.1-2.2, rilanit special 0.3-0.5, stearic acid 0.4-0.7, organosiloxane 0.1-0.3, turpentine alcohol 15-20, the molten acid anhydride acetic acid esters of butyl 10-15, its preparation method is silicon dioxide, zinc oxide to be put into calciner at 520-610 DEG C, calcine 1-2 hour, taking-up is cooled to room temperature, adds celluloid to grind 20-40 minute; Molten butyl acid anhydride acetic acid esters, turpentine alcohol, organosiloxane are stirred and evenly mixed, at 140-180 DEG C, react 2-3 hour, be cooled to 80-100 DEG C, add rilanit special, stearic acid, keep temperature to stir 3-4 hour; Above each product is mixed, grind and make 300-400 order slurry and get final product for 2-4 hour.

The preparation method of carbon nanotube conducting silver slurry for described a kind of filter, is characterized in that comprising the following steps:

(1) get boron oxide and put into calciner calcine 1-2 hour at 650-750 DEG C, take out and coolingly add carbon nano-tube, blanc fixe to add suitable quantity of water to grind and within 2-3 hour, make 200-300 order slurry, spraying is dry, dries;

(2) getting ethylene glycol monobutyl ether, acrylic resin puts into reactor and is heated to 85-100 DEG C and stirs and evenly mixs, insulated and stirred 30-50 minute, add again titanate coupling agent, sodium Diacetate, methylimidazole quinoline stirring reaction 1-2 hour, be cooled to 40-50 DEG C and add sodium zirconate to grind 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 μ m slurry grain, to obtain final product.

The present invention has following beneficial effect: the present invention is by optimum organization plurality of active ingredients, simplify production technology, compared with prior art, the present invention easily implements, easy and simple to handle, this filter is coated on substrate with carbon nanotube conducting silver slurry and sintering after, can form that compactness is high, the excellent and good silver conductive layer of solderability of strong adhesion, electric conductivity, market prospects are wide.

Embodiment

Carbon nanotube conducting silver slurry for described a kind of filter, it is characterized in that, made by the raw material of following weight portion: silver powder 41, carbon nano-tube 4, boron oxide 1, blanc fixe 2.1, sodium zirconate 0.9, titanate coupling agent 0.2, sodium Diacetate 0.7, methylimidazole quinoline 1.6, ethylene glycol monobutyl ether 6, acrylic resin 3, auxiliary agent 30, suitable quantity of water.

Described auxiliary agent is made up of following raw materials in part by weight: silica 1 .5, zinc oxide 4, celluloid 1.9, rilanit special 0.3, stearic acid 0.4, organosiloxane 0.1, turpentine alcohol 16, the molten acid anhydride acetic acid esters 13 of butyl, its preparation method is silicon dioxide, zinc oxide to be put into calciner at 520-610 DEG C, calcine 1-2 hour, taking-up is cooled to room temperature, adds celluloid to grind 20-40 minute; Molten butyl acid anhydride acetic acid esters, turpentine alcohol, organosiloxane are stirred and evenly mixed, at 140-180 DEG C, react 2-3 hour, be cooled to 80-100 DEG C, add rilanit special, stearic acid, keep temperature to stir 3-4 hour; Above each product is mixed, grind and make 300-400 order slurry and get final product for 2-4 hour.

Manufacture method comprises the following steps:

(1) get boron oxide and put into calciner calcine 1-2 hour at 650-750 DEG C, take out and coolingly add carbon nano-tube, blanc fixe to add suitable quantity of water to grind and within 2-3 hour, make 200-300 order slurry, spraying is dry, dries;

(2) getting ethylene glycol monobutyl ether, acrylic resin puts into reactor and is heated to 85-100 DEG C and stirs and evenly mixs, insulated and stirred 30-50 minute, add again titanate coupling agent, sodium Diacetate, methylimidazole quinoline stirring reaction 1-2 hour, be cooled to 40-50 DEG C and add sodium zirconate to grind 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 μ m slurry grain, to obtain final product.

The technical indicator of processing the conductive silver paste obtaining 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;

(5) solderability excellent, burnt in a heap easily separated, printing adaptability good and solvent resistance is excellent.

Claims (2)

1. a carbon nanotube conducting silver slurry for filter, it is characterized in that, made by the raw material of following weight portion: silver powder 40-50, carbon nano-tube 3-4, boron oxide 1-2, blanc fixe 2.1-3.4, sodium zirconate 0.4-0.9, titanate coupling agent 0.2-0.4, sodium Diacetate 0.4-0.7, methylimidazole quinoline 1.2-2.3, ethylene glycol monobutyl ether 4-6, acrylic resin 3-5, auxiliary agent 30-40, suitable quantity of water; Described auxiliary agent is made up of following raw materials in part by weight: silica 1-2, zinc oxide 3-4, celluloid 1.1-2.2, rilanit special 0.3-0.5, stearic acid 0.4-0.7, organosiloxane 0.1-0.3, turpentine alcohol 15-20, the molten acid anhydride acetic acid esters of butyl 10-15, its preparation method is silicon dioxide, zinc oxide to be put into calciner at 520-610 DEG C, calcine 1-2 hour, taking-up is cooled to room temperature, adds celluloid to grind 20-40 minute; Molten butyl acid anhydride acetic acid esters, turpentine alcohol, organosiloxane are stirred and evenly mixed, at 140-180 DEG C, react 2-3 hour, be cooled to 80-100 DEG C, add rilanit special, stearic acid, keep temperature to stir 3-4 hour; Above each product is mixed, grind and make 300-400 order slurry and get final product for 2-4 hour.

2. the manufacture method of carbon nanotube conducting silver slurry for a kind of filter according to claim 1, is characterized in that comprising the following steps:

(1) get boron oxide and put into calciner calcine 1-2 hour at 650-750 DEG C, take out and coolingly add carbon nano-tube, blanc fixe to add suitable quantity of water to grind and within 2-3 hour, make 200-300 order slurry, spraying is dry, dries;

(2) getting ethylene glycol monobutyl ether, acrylic resin puts into reactor and is heated to 85-100 DEG C and stirs and evenly mixs, insulated and stirred 30-50 minute, add again titanate coupling agent, sodium Diacetate, methylimidazole quinoline stirring reaction 1-2 hour, be cooled to 40-50 DEG C and add sodium zirconate to grind 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 μ m slurry grain, to obtain final product.