Graphene modified phosphate composite adhesive and preparation method and application thereof in high-temperature sensor
A graphene modification and phosphate technology, applied in adhesives, inorganic adhesives, adhesive additives, etc., can solve the problems of thermal conductivity, poor acid and alkali resistance, etc., achieve outstanding corrosion resistance, solve low thermal conductivity, mechanical problems, etc. good performance effect
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Embodiment 1
[0023] Copper hydroxide powder, alumina and graphene slurry were ball milled and mixed at a mass ratio of 1:0.01:0, the ball milling rate was 250r / min, and the time was 5h. The ball milled product was placed in a vacuum drying oven, vacuumed to 0.1 Pa, and kept at 80° C. for 2 hours. The dry product is calcined at high temperature to obtain a powder mixture, and the calcining environment is N 2 atmosphere, the calcination temperature is 800°C, and the calcination time is 5h. The curing agent powder mixture obtained after calcining is mixed evenly with the liquid phosphate adhesive at a mass ratio of 1:1.
[0024] Clean the surface to be bonded, and apply the graphene-modified phosphate composite material evenly on the surface to be bonded, with a thickness of 0.5 mm. Fix the bonding surface, put it into a constant temperature box and let it stand for curing. The curing temperature is 90°C and the curing time is 10 hours.
Embodiment 2
[0026] Copper hydroxide powder, magnesium oxide and graphene slurry (1%wt) were ball milled and mixed at a mass ratio of 1:0.01:0.5, the ball milling speed was 250r / min, and the time was 5h. The ball milled product was placed in a vacuum drying oven, vacuumed to 0.1 Pa, and kept at 80° C. for 2 hours. The dry product is calcined at high temperature to obtain a powder mixture, and the calcining environment is N 2 atmosphere, the calcination temperature is 800°C, and the calcination time is 2h. The curing agent powder mixture obtained after calcining is mixed evenly with the liquid phosphate adhesive in a mass ratio of 1:1.
[0027] Clean the surface to be bonded, and apply the graphene-modified phosphate composite material evenly on the bonding surface, with a thickness of 1mm. Fix the bonding surface, put it into a constant temperature box and let it stand for curing. The curing temperature is 90°C and the curing time is 10 hours.
Embodiment 3
[0029] Copper hydroxide powder, calcium oxide and graphene slurry (1%wt) were ball milled and mixed at a mass ratio of 1:0.01:1, the ball milling speed was 250r / min, and the time was 5h. The ball milled product was placed in a vacuum drying oven, evacuated to 0.1 Pa, and kept at 80° C. for 4 hours. The dried product was calcined at high temperature to obtain a powder mixture, the calcining environment was Ar atmosphere, the calcining temperature was 800° C., and the calcining time was 2 h. The curing agent powder mixture and the liquid phosphate adhesive are mixed evenly in a mass ratio of 1:1.
[0030] Clean up the surface to be bonded, and apply the graphene-modified phosphate composite material evenly on the bonding surface, with a thickness of 0.5mm. Fix the bonding surface, put it into a constant temperature box and let it stand for curing. The curing temperature is 100°C and the curing time is 10 hours.
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