EFFECT OF CERAMIC MICROSPHERES ON EPOXY POROUS SOUND-ABSORBING MATERIALS
Abstract
In order to study the effect of ceramic microspheres on the sound absorption, sound insulation, abrasion resistance and tensile properties of the material, specimens with proportions of ceramic microsphere components of (0, 20 and 40) % were prepared for the experiments. The results show that an appropriate addition of ceramic microspheres can improve the pore structure of the material and enhance its sound absorption; however, excessive addition can block the pores and consequently degrade the material’s performance. Comparing the sound absorption and sound insulation performance of three groups of samples, it was found that EM-0 and EM-20 exhibited better sound absorption performance. The sound insulation of EM-20 containing ceramic microsphere material increased from 20.64 dB to 22.7 dB compared to EM-0. Therefore, the addition of ceramic microspheres improved the sound insulation performance of the sound-absorption material. According to physical performance tests, the compressive strength of the EM-20 sample is 0.85 MPa, the tensile strength is 0.6 MPa, the wear is 0.335 g/cm2, the average porosity is 71.5 %, and the water absorption is 45.9 %. Therefore, the density of the sample is relatively low, making it easy to transport. From this, it can be concluded that ceramic microspheres can optimize the overall performance of materials, and the most suitable amount of ceramic microspheres added is 20 %, achieving the best sound absorption effect.
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