Full-ceramic sound barrier and preparation method thereof
A sound barrier and ceramic technology, applied in the field of all-ceramic sound barrier and its preparation, can solve the problems of difficult drilling and other mechanical processing, large porosity, strength attenuation, etc., achieve good sound attenuation and isolation effect, and prolong service life , the effect of good compressive strength
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[0038] The present invention also provides a method for preparing the all-ceramic sound barrier, comprising the following steps:
[0039] 1) The main material, SiC and flux are mixed and then pre-pressed to obtain a pre-pressed body for the sound insulation part;
[0040] 2) pouring the mixed slurry of the main material, SiC, flux and rosin saponification solution on the pre-pressed body of the sound insulation part, and performing drying treatment to obtain a dry product;
[0041] 3) Foaming the dried product to obtain an all-ceramic sound barrier.
[0042] The pressure of the pre-press forming in step 1) of the present invention is preferably 3-5 MPa, more preferably 4 MPa.
[0043] The slurry in step 2) of the present invention is preferably stirred and foamed and poured on the pre-pressed body of the sound insulation part.
[0044] The moisture content of the dried product in step 2) of the present invention is preferably 2-3%, more preferably 2.2-2.8%, more preferably 2...
Embodiment 1
[0049] 4.8kg of gold tailings, 0.15kg of SiC and 4kg of feldspar were uniformly mixed and then pre-pressed under a pressure of 3.3MPa to obtain a pre-pressed body for the sound insulation part. Mix 4.5kg of gold tailings, 0.2kg of SiC, 4.2kg of feldspar and 3.07kg of rosin saponification solution to make a slurry, stir and foam, pour it on the pre-pressed body of the sound insulation part, and dry it into a dry slurry with a moisture content of 2%. product. The dried product was foamed at 1070°C for 75 minutes to obtain a thickness of 15 cm and a bulk density of 0.32 g / cm 3 All-ceramic sound barrier.
[0050] In the all-ceramic sound barrier of Example 1, the bulk density of the sound-absorbing part is 0.3 g / cm 3 , the thickness is 5cm; the bulk density of the sound insulation part is 0.35g / cm 3 , the thickness is 10cm.
[0051] The all-ceramic sound barrier of Example 1 has a compressive strength of 4.8MPa, good water resistance and aging resistance, and can reduce the nois...
Embodiment 2
[0053] 5.8kg of granite abrasives, 1kg of SiC, 2.6kg of perlite and 2.6kg of waste glass powder were mixed evenly, and pre-pressed under a pressure of 4.8MPa to obtain a pre-pressed body for the sound insulation part. Mix 5.6kg of granite abrasive, 1kg of SiC, 2.6kg of perlite, 2.6kg of waste glass powder and 4.4kg of rosin saponification solution to make a slurry, stir and foam, pour it on the pre-pressed body of the sound insulation part, and dry it to a moisture content of 3% dry product. The dried product was foamed at 1150°C for 55 minutes to obtain a thickness of 22 cm and a bulk density of 0.38 g / cm 3 All-ceramic sound barrier.
[0054] In the all-ceramic sound barrier of Example 2, the bulk density of the sound-absorbing part is 0.35 g / cm 3 , the thickness is 8cm; the volume density of the sound insulation part is 0.4g / cm 3 , the thickness is 14cm.
[0055] The all-ceramic sound barrier of Example 2 has a compressive strength of 7 MPa, good water resistance and agi...
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