Bimetallic oxide-silicon carbide fiber multi-scale reinforcement reinforced aluminum phosphate ceramic-based structure wave absorbing material and preparation method thereof
A bimetallic oxide and silicon carbide fiber technology, applied in the field of wave-absorbing materials, can solve the problems of uneven dispersion of nano-powders, controllability and uniformity of dielectric properties of structural wave-absorbing materials, etc. Electrical properties, good absorbing effect and mechanical properties, the effect of good absorbing effect
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Embodiment 1
[0038] This embodiment is a nickel cobaltate-silicon carbide fiber multi-scale reinforcement reinforced aluminum phosphate ceramic-based structural wave-absorbing material, the aluminum phosphate ceramic-based structural wave-absorbing material is made of nickel cobaltate-silicon carbide fiber multi-scale reinforcement As the absorbent, aluminum phosphate is used as the matrix. The content of nickel cobaltate-silicon carbide fiber multi-scale reinforcement is 40wt%, and the aluminum phosphate matrix is 40wt%.
[0039] Step 1. Put 6 pieces of silicon carbide fiber cloth cut to a suitable size, put them in acetone, wash them in an ultrasonic wave for 1 hour, and then dry them in an oven; the drying temperature is 80°C; the ultrasonic power is 100W. The size of silicon carbide fiber cloth is 35mm*45mm.
[0040] Step 2. Preparation of nickel cobaltate-silicon carbide fiber multi-scale reinforcement. Weigh a certain amount of cobalt nitrate, nickel nitrate and urea, wherein the...
Embodiment 2
[0045] This embodiment is a nickel cobaltate-silicon carbide fiber multi-scale reinforcement reinforced aluminum phosphate ceramic-based structural wave-absorbing material, the aluminum phosphate ceramic-based structural wave-absorbing material is made of nickel cobaltate-silicon carbide fiber multi-scale reinforcement As the absorbent, aluminum phosphate is used as the matrix. The content of nickel cobaltate-silicon carbide fiber multi-scale reinforcement is 60wt%, and the aluminum phosphate matrix is 40wt%.
[0046] Step 1. Put 6 pieces of silicon carbide fiber cloth cut to a suitable size, put them in acetone, wash them in an ultrasonic wave for 1 hour, and then dry them in an oven; the drying temperature is 80°C; the ultrasonic power is 100W. The size of silicon carbide fiber cloth is 35mm*45mm.
[0047] Step 2. Preparation of nickel cobaltate-silicon carbide fiber multi-scale reinforcement. Weigh a certain amount of cobalt nitrate, nickel nitrate and urea, wherein the...
Embodiment 3
[0052] In step 2, the ratio of cobalt nitrate, nickel nitrate, urea and distilled water is 2mmol: 1mmol: 8mmol: 70ml, the hydrothermal reaction temperature is 150°C, and the hydrothermal reaction time is 5h; the annealing treatment temperature is 325°C, and the treatment time is 4h. Condition is the same as embodiment 2.
[0053] The prepared nickel cobaltate-silicon carbide fiber multi-scale reinforcement reinforced aluminum phosphate ceramic matrix absorbing material has a reflection loss of less than -7dB in the X-band frequency range and a bending strength of 273MPa.
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