Tough cement-based piezoelectric composite material, preparation method and application thereof
A piezoelectric composite material, cement-based technology, applied in the direction of manufacturing tools, ceramic molding machines, etc., can solve the problems of high brittleness and poor adhesion of concrete structures, and achieve the effects of good flexibility, reduced safety hazards, and high sensing accuracy.
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Embodiment 1
[0025] The organic-inorganic metal halide perovskite used in this example is CH 3 NH 3 PB 3 , the preparation method is as follows: first weigh 7.9g of methylamine iodide, 23.15g of lead iodide powder and 40mL of DMF solution; place methylamine iodide, lead iodide and DMF solution in a 100mL beaker, and heat to 60 °C, the stirring time and temperature were 12 h and 60 °C, respectively, until a transparent yellow liquid was formed to construct the perovskite CH 3 NH 3 PB 3 ; Open the mouth of the beaker and continue heating and stirring until the solvent is completely volatilized into a powder, and finally put it into a vacuum drying oven at 60 ° C for 24 hours to obtain CH 3 NH 3 PB 3 Powder. After drying, pulverize the perovskite CH 3 NH 3 PB 3 The crystal particle size is 60-100nm.
[0026] The preparation method of the tough cement-based piezoelectric composite material of this embodiment is specifically:
[0027] Dissolve 5g of PVDF in 100g of DMF and stir even...
Embodiment 2
[0030] After dissolving 10g PVDF in 100g DMAc and stirring evenly, introduce 15g of the CH prepared in Example 1 3 NH 3 PB 3 Mix well with 10g of sulfoaluminate cement and pour it into a disc shape. The stirring temperature is 65°C. Finally, put it in room temperature water for curing for 48 hours. After 7 days, take it out and let it dry naturally to obtain a tough cement-based piezoelectric composite material.
[0031] In this example, the product made of tough cement-based piezoelectric composite material was obtained according to the method of Example 1, and its piezoelectric constant was 16.23 pC / N.
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