Zeolite sound-absorbing material as well as preparation method and application thereof
A sound-absorbing material and zeolite technology, applied in the field of zeolite sound-absorbing material and its preparation, can solve the problems of poor low-frequency effect of zeolite in improving loudspeaker, blocking zeolite molecular sieve pores, limiting the content of active components, etc., and achieves large specific surface area and wide pore size range , the effect of high mechanical strength
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[0028] A preparation method of zeolite sound-absorbing material, comprising the steps of:
[0029] Step 1: kneading white carbon black, silicon-containing pseudo-boehmite, silica sol, zeolite powder and deionized water to prepare a mixture;
[0030] In parts by mass, mix and knead 9-10 parts of white carbon black, 40-45 parts of silicon-containing pseudoboehmite powder, 26-30 parts of silica sol, 1-4 parts of zeolite powder and 18-21 parts of deionized water. Get a mixture. The above-mentioned granular shape is one or more of cylindrical shape, olive shape and regular spherical shape, preferably cylindrical shape.
[0031] Among them, the above-mentioned silica model is 10279-57-9, the silicon-containing pseudo-boehmite powder model is YN-102D, the silica sol model is GTS-9728, the zeolite powder model: HZSM-5 zeolite powder, 100 mesh powder, Exclusively for premixes.
[0032] SiO in the silicon-containing pseudo-boehmite in the above-mentioned step 1 2 The mass percent co...
Embodiment 1
[0047] In parts by mass, knead and extrude 9.9 parts of white carbon black, 40.1 parts of silicon-containing pseudoboehmite powder, 27.8 parts of silica sol, 2.4 parts of HZSM-5 zeolite powder and 19.8 parts of deionized water to obtain 2mm Put the cylindrical mixture in the oven at 76°C and dry for 24 hours to obtain a cylindrical precursor with a diameter of 1.5mm, that is, the precursor before firing, and bake the precursor before firing at 450°C in an air atmosphere The roasted precursor was obtained in 5 hours, and the roasted precursor was converted by hydrothermal crystallization method, and treated at 160 ° C in a solution containing NaOH and TPABr for 3 days, and then the prepared product was washed and dried Afterwards, it was calcined at 450°C for 4 hours in an air atmosphere to obtain the final product, which was designated as zeolite sound-absorbing material A1.
Embodiment 2
[0049] In parts by mass, knead and extrude 9.9 parts of white carbon black, 40.1 parts of silicon-containing pseudoboehmite powder, 27.8 parts of silica sol, 2.4 parts of HZSM-5 zeolite powder and 19.8 parts of deionized water to obtain 2mm Put the cylindrical mixture in the oven at 76°C and dry for 24 hours to obtain a cylindrical precursor with a diameter of 1.5mm, that is, the precursor before firing, and bake the precursor before firing at 650°C in an air atmosphere The roasted precursor was obtained in 5 hours, and the roasted precursor was converted by hydrothermal crystallization method, and treated at 160 ° C in a solution containing NaOH and TPABr for 3 days, and then the prepared product was washed and dried Afterwards, it was calcined at 450°C for 4 hours in an air atmosphere to obtain the final product, which was designated as zeolite sound-absorbing material A2.
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