Magnesium oxide insulating copper sheath heating cable
A technology for heating cables and copper sheaths, applied in the direction of insulated cables, insulated conductors, cables, etc., can solve the problems of cable performance degradation and inability to use, and achieve good heat resistance, good protection, good thermal conductivity and insulation performance Effect
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Embodiment 1
[0024] Preparation of thermally conductive powder
[0025] S1: According to the mass ratio of 75:1, take silicon powder and aluminum powder respectively, place them in a ball mill for a ball mill, and ball mill for 15 minutes at a frequency of 1200r / min and a mass ratio of ball to material of 3:1, mix well, and add silicon The sodium chloride of 0.3% of the total mass of powder and aluminum powder is carried out secondary ball milling, and the frequency is 1000r / min, ball milling 20min under the condition of 3:1 mass ratio of ball to material, and mixing obtains the mixed material;
[0026] S2: Put the mixed material in a ceramic boat, then put it into a high-temperature tube furnace, and conduct a heating reaction at 1400°C in a nitrogen atmosphere for 10 hours. After the reaction is completed, take out the reactant, add deionized water after grinding, Ultrasonic cleaning and drying to obtain aluminum-doped nano-silicon nitride particles;
[0027] S3: Submerge the aluminum-d...
Embodiment 2
[0033] Preparation of thermally conductive powder
[0034] S1: According to the mass ratio of 50:1, take silicon powder and aluminum powder respectively, place them in a ball mill for a ball mill, and ball mill for 12 minutes at a frequency of 1100r / min and a mass ratio of ball to material of 3:1, mix well, and add silicon The sodium chloride of 0.2% of the total mass of powder and aluminum powder is carried out secondary ball milling, and the frequency is 800r / min, ball milling 15min under the condition of 3:1 mass ratio of ball to material, and mixing obtains the mixed material;
[0035] S2: Put the mixed material in a ceramic boat, then put it into a high-temperature tube furnace, and conduct a heating reaction at 1300°C in a nitrogen atmosphere for 12 hours. After the reaction is completed, take out the reactant, add deionized water after grinding, Ultrasonic cleaning and drying to obtain aluminum-doped nano-silicon nitride particles;
[0036] S3: Submerge the aluminum-do...
Embodiment 3
[0042]Preparation of thermally conductive powder
[0043] S1: According to the mass ratio of 60:1, take silicon powder and aluminum powder respectively, put them in a ball mill for a ball mill, and ball mill for 10 minutes at a frequency of 1200r / min and a mass ratio of ball to material of 3:1, mix well, and add silicon The sodium chloride of 0.3% of the total mass of powder and aluminum powder is carried out secondary ball milling, and the frequency is 900r / min, ball milling 20min under the condition of 3:1 mass ratio of ball to material, and mixing obtains the mixed material;
[0044] S2: Put the mixed material in a ceramic boat, then put it into a high-temperature tube furnace, and conduct a heating reaction at 1400°C in a nitrogen atmosphere for 11 hours. After the reaction is completed, take out the reactant, add deionized water after grinding, Ultrasonic cleaning and drying to obtain aluminum-doped nano-silicon nitride particles;
[0045] S3: Submerge the aluminum-doped...
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