Thermistor core material and production technology thereof
A technology of thermistor and production process, applied in the direction of resistors with positive temperature coefficient, etc., can solve the problem that the performance of the core material of the thermistor is difficult to meet the requirements of use, limit the development of thermistor performance, and difficult to meet the requirements of the production process and other problems, to achieve the effect of solving the problem of insufficient pressure resistance, good adhesion, and reduced external dimensions.
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Embodiment 1
[0036] The ratio of raw materials used in the core material is: 19% high-density polyethylene; 19% nickel powder, nickel powder particles 1~2um; 4-hydroxyphenyl) propionate] pentaerythritol ester, molecular formula C73H108O12; flame retardant composed of 45% magnesium hydroxide; 6.7% Zinc oxide.
[0037] First, the above-mentioned raw materials are placed in a vacuum box or an oven for moisture removal pretreatment. The high-density polyethylene resin and magnesium hydroxide flame retardant materials are dried in a common oven at 90 degrees for 2 hours, and the conductive materials are first treated in a common oven at 150 degrees for 24 hours, and then all the conductive materials are put into a vacuum oven for 22 hours at 150 degrees. For pretreatment, the temperature is controlled at 80~150°C. Here, the temperature range is: 130°C, and the vacuum degree is -0.05MPa. Vacuum pretreatment time is 46h;
[0038] Then put the above-mentioned raw materials that have been pretre...
Embodiment 2
[0040] The ratio of raw materials used in the core material is: 30% high-density polyethylene; 19.5% nickel powder, the particle size of nickel powder is 1~2um, and the purity is electronic grade; 0.3% antioxidant 1010 is four [β-(3,5-di tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, molecular formula C73H108O12; flame retardant composed of 46% magnesium hydroxide; 4.2% Calcium stearate.
[0041] First, the above-mentioned raw materials are placed in a vacuum box or an oven for moisture removal pretreatment. The high-density polyethylene resin and magnesium hydroxide flame retardant materials are dried in an ordinary oven at 100 degrees for 2 hours. The main purpose here is to remove the moisture in the raw materials, and the time can be adjusted appropriately. The conductive material is first treated in an ordinary oven at 150°C for 24 hours to remove moisture, and then the conductive material is pretreated in a vacuum oven at 180°C with a vacuum degree of 0....
Embodiment 3
[0044] The ratio of raw materials used in the core material is: 31% high-density polyethylene; 20% carbon nanotubes. The technical parameters of the carbon nanotubes used are 12um in length, 10nm in diameter, and a surface area of ≥230m 2 / g, bulk density 0.05g / cm 3 ; 0.4% antioxidant 1010, tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, molecular formula C73H108O12; 46% flame retardant composed of magnesium hydroxide; 2.6% Calcium stearate.
[0045] First, the above-mentioned raw materials are placed in a vacuum box or an oven for moisture removal pretreatment. The high-density polyethylene resin and magnesium hydroxide flame retardant materials are dried in an ordinary oven at 95 degrees for 2 hours. The main purpose here is to remove the moisture in the raw materials, and the time can be adjusted appropriately. The conductive material is first treated in an ordinary oven at 150 degrees for 24 hours to remove moisture. Here, all the con...
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