High temperature sintering conductive silver paste for positive temperature coefficient (PTC) thermistor and preparation method thereof
A technology of high-temperature sintering and conductive silver paste, which is applied in the manufacture of cables/conductors, resistors with positive temperature coefficients, and conductive materials dispersed in non-conductive inorganic materials. Problems such as high sintering temperature and narrow sintering range can achieve the effect of reducing procurement cost and cycle, improving electrical conductivity, and being easy to eutectic
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Embodiment 1
[0028] A preparation method of conductive silver paste for PTC thermistor, the method may further comprise the steps:
[0029] (1) Preparation of carrier: Prepare 50Kg of carrier, weigh 8Kg of polymer resin, 22Kg of butyl ether and 20Kg of terpineol, then heat it up to 80°C and keep the temperature constant until the resin dissolves at a constant temperature of 25000-35000cps, and then the resin Filter and remove impurities on a 300-400 mesh mesh cloth to obtain a carrier;
[0030] (2) Prepare materials, prepare materials according to the following components and contents:
[0031]
[0032] Among the metal silver powders used, the ball powder is 65Kg, the flake powder is 7Kg, the particle size of the ball powder is 1.4 μm, and the tap density is 2.4 g / ml; the particle size of the flake powder is 0.9 μm, and the tap density is 1.9 g / ml;
[0033] The glass powder used is lead-free glass powder, the sintering temperature is 490-700 DEG C, and its composition and content (wt%)...
Embodiment 2
[0040] A preparation method of conductive silver paste for PTC thermistor, the method may further comprise the steps:
[0041] (1) Preparation of carrier: Prepare 50Kg of carrier, weigh 10Kg of polymer resin, 22Kg of butyl ether and 18Kg of terpineol, then heat it up to 80°C and keep the temperature constant until the resin dissolves at a constant temperature of 25000-35000cps, and then the resin Filter and remove impurities on a 300-400 mesh mesh cloth to obtain a carrier;
[0042] (2) Prepare materials, prepare materials according to the following components and contents:
[0043]
[0044] Among the metal silver powders used, the ball powder is 60Kg, the flake powder is 5Kg, the particle size of the ball powder is 1.2 μm, and the tap density is 2.3 g / ml; the particle size of the flake powder is 0.8 μm, and the tap density is 1.8 g / ml;
[0045] The glass powder used is lead-free glass powder, the sintering temperature is 490-700°C, and its components and contents are:
...
Embodiment 3
[0051] A preparation method for conductive silver paste for PTC thermistor, the method may further comprise the steps:
[0052] (1) Preparation of carrier: Prepare 50Kg of carrier, weigh 12.5Kg of polymer resin, 17.5Kg of butyl ether and 20Kg of terpineol, then heat it up to 80°C and keep the temperature constant until the resin dissolves at a constant temperature to 25000-30000cps, then filtering the resin on a mesh cloth of 300-400 mesh to obtain a carrier;
[0053] (2) Prepare materials, prepare materials according to the following components and contents:
[0054]
[0055] Among the metal silver powders used, the ball powder is 55Kg, the flake powder is 5Kg, the particle size of the ball powder is 1.0 μm, and the tap density is 1.8 g / ml; the particle size of the flake powder is 0.6 μm, and the tap density is 1.2 g / ml;
[0056] The glass powder used is lead-free glass powder, the sintering temperature is 490-700°C, and its components and contents are:
[0057]
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