CN110526734A - A kind of environmental protection porous ceramic sound absorption material and preparation method thereof - Google Patents

A kind of environmental protection porous ceramic sound absorption material and preparation method thereof Download PDF

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Publication number
CN110526734A
CN110526734A CN201910873119.2A CN201910873119A CN110526734A CN 110526734 A CN110526734 A CN 110526734A CN 201910873119 A CN201910873119 A CN 201910873119A CN 110526734 A CN110526734 A CN 110526734A
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sound absorption
porous ceramic
environmental protection
ceramic sound
absorption material
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花开慧
罗欢
范洪波
邱永福
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Dongguan University of Technology
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Dongguan University of Technology
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Abstract

The present invention provides a kind of environmentally friendly porous ceramic sound absorption materials and preparation method thereof.Environmental protection porous ceramic sound absorption material of the invention mainly uses building castoff, aluminium oxide, aluminum fluoride, calcium carbonate, cerous nitrate, active carbon, cornstarch to be prepared, it is a kind of environment-friendly type sound-absorbing porous material, with certain porosity and water absorption rate, better mechanical property, the problem of noise pollution in production and living can farthest be solved, and influence of the building castoff accumulation to environment can be reduced, the preparation method of porous ceramic sound absorption material of the present invention is simple, it is at low cost, used time is short, easy to implement.

Description

A kind of environmental protection porous ceramic sound absorption material and preparation method thereof
Technical field
The present invention relates to porous ceramic film material fields, and in particular to a kind of environmental protection porous ceramic sound absorption material and its preparation side Method.
Background technique
In the epoch of current economic rapid development, noise problem is increasingly by public concern.Noise pollution, air are dirty Dye and water pollution have been acknowledged as three overall situation public hazards of contemporary world environment.Noise not only affects the normal life of people And order, also affect daily life and physical and mental health.In recent years, how to go control noise to pollute, how to reduce and make an uproar Influence of the sound pollution to people's daily life has become the task of top priority, and the research of noise reduction, sound-absorbing material is also had become The focus and emphasis of material researcher research.
With the continuous progress of urbanization process, urban construction and development is rapid, and the update in city is also like a raging fire Ground carries out.In urbanization process, a large amount of building castoffs are produced, building castoff accounts for about the 40% of municipal refuse total amount at present, Not only it had taken up space but also very big pollution is caused to environment.
Based on this, it is necessary to provide one kind using building castoff as raw material, again with noise elimination function, solve noise pollution While, also it is able to solve building castoff recycling problem and environmental protection sound absorption porous ceramics and preparation method thereof.
Summary of the invention
In order to solve the above technical problems, the present invention first is designed to provide a kind of environmentally friendly porous ceramic sound absorption material, The material while reduction noise pollution endangers, reduces the pollution of building castoff mainly using building castoff as raw material.
Second object of the present invention is to provide a kind of preparation method of environmentally friendly porous ceramic sound absorption material, this method behaviour Make simply, it is at low cost, it is environmentally friendly and easily prepared.
Above-mentioned purpose to realize the present invention, using following technical scheme:
A kind of environmental protection porous ceramic sound absorption material by mixing, granulation, dry, molding and is burnt by starting material and cornstarch Knot is made, and cornstarch quality is the 5wt%-20wt% of starting material quality.
Preferably, starting material is mixed by inorganic mixture with active carbon process and drying is made, and inorganic mixture includes Account for the building castoff of starting material mass ratio 38.9-50.47wt%, the aluminium oxide of 33.52-43.75wt%, 2.25- The cerous nitrate of the aluminum fluoride of 10.78wt%, the calcium carbonate of 2.88-9.46wt% and 0.5-4.73wt%, active carbon account for starting material Mass ratio is 1.96-4.02wt%.
Preferably, the main component of building castoff includes inorganic compound and loss on ignition, and the inorganic compound includes Account for the silica of building castoff mass ratio 48-59wt%, the aluminium oxide of 16-32wt%, 1.8-4.2wt% iron oxide, The calcium oxide of 5.0-13.0wt%, the magnesia of 1.8-5.3wt%, the sodium oxide molybdena of 2.9-4.3wt%, 1.5-4.0wt% potassium oxide； The mass ratio that the loss on ignition accounts for the building castoff is 1.2-4.2wt%.
Specifically, building castoff refers to useless brick, the waste concrete, waste sand and gravel that the processes such as construction, removal, finishing generate Equal inorganic wastes.Preferably, starting material and the maximum temperature of cornstarch sintering are 1100-1230 DEG C, in sintering process Heating rate is 5-12 DEG C/min.
Preferably, the solvent for being enough to make mixture wet is added in the mixed process of starting material and cornstarch, crosses 30- The sieve of 80 mesh is granulated, and blank is made.
Preferably, ball milling uses wet ball grinding method, and the mass ratio of the starting material, solvent and abrading-ball is 1:1:10, Ball-milling Time is 0.5-5h, ball milling speed 300-800r/min.
Preferably, the open porosity of environmentally friendly porous ceramic sound absorption material is 69%-82%, average sound absorption coefficient 0.52- 0.64。
The present invention also provides the preparation methods of above-mentioned environmentally friendly porous ceramic sound absorption material, comprising the following steps:
Step 1: initial feed, solvent, abrading-ball being subjected to wet ball grinding with mass ratio for 1:1:10, slurry is made；
Step 2: after slurry is carried out drying and processing, carrying out ground and mixed with cornstarch, material powder is made；
Step 3: material powder being granulated, blank is made；After blank drying and processing, it is transferred in mold and carries out at pressure maintaining Green compact are made in reason；
Step 4: green compact are sintered in high temperature furnace, keep the temperature and cooling treatment after, be made environmental protection porous ceramics absorb sound material Material.
Specifically, the solvent in step 1 specifically can be tap water, distilled water, deionized water etc..
Preferably, the cornstarch quality in step 2 is the 5-20wt% of starting material quality.
Preferably, the drying temperature of the drying and processing in step 2 is 90-110 DEG C.
Preferably, the pressure that pressure maintaining is handled in step 3 is 2-6MPa, dwell time 1-6min.
Preferably, the maximum temperature being sintered in step 4 is 1100-1250 DEG C, and the heating rate of sintering is 5-12 DEG C/min,
Preferably, the rate of temperature fall in the treatment process that cools down in step 4 is 5-10 DEG C/min, will be through excessively high with above-mentioned rate of temperature fall The green compact of temperature processing use wind cooling temperature lowering to room temperature after cooling to 500 DEG C.
Preferably, the processing time kept the temperature in step 4 is 0.8-3h.
The invention has the following beneficial effects:
(1) environmentally friendly porous ceramic sound absorption material prepared by the present invention is acidproof, alkaline-resisting, corrosion-resistant, high mechanical strength, chemical property It is good.
(2) environmentally friendly porous ceramic sound absorption material porosity prepared by the present invention is high, and sound absorbing performance is strong, while can reduce and build Build waste accumulation influence caused by environment.
(3) method of present invention preparation environmental protection sound absorption sound-absorbing porous material is simple, and at low cost, the used time is short, easy to implement.
Detailed description of the invention
Fig. 1 is the cross-section morphology scanning electron microscope (SEM) photograph of porous material in embodiment 1,2,3 and 4.
Specific embodiment
Below by specific embodiment combination attached drawing, invention is further described in detail, but implementation of the invention Mode is without being limited thereto, and all technologies based on realization belonging to above content of the present invention all belong to the scope of the present invention.
The present invention is made by starting material and cornstarch by mixing, granulation, dry, molding and sintering, the starting material Material is mixed and is dried by inorganic mixture and active carbon obtained.
Starting material of the invention includes building castoff, aluminium oxide, aluminum fluoride, calcium carbonate, cerous nitrate and active carbon.
Wherein, the weight percentage of building castoff specifically can be 38.9wt%, 39wt%, 39.5wt%, 40wt%, 42.37wt%, 45wt%, 47.5wt%, 48.8wt%, 50.2wt%, 50.4wt%, 50.47wt% etc.；
The percentage composition that aluminium oxide accounts for starting material quality specifically can be 33.52wt%, 33.58wt%, 35.53wt%, 38.52wt%, 40wt%, 40.75wt%, 41.5wt%, 42.7wt%, 43.75wt% etc.；
The percentage composition that aluminum fluoride accounts for starting material quality specifically can be 2.25wt%, 5.52wt%, 6.63wt%, 7.78wt%, 8.89wt%, 9.98wt%, 10.01wt%, 10.78wt% etc.；
The percentage composition that calcium carbonate accounts for starting material quality specifically can be 2.88wt%, 3.37wt%, 3.88wt%, 4.01wt%, 4.52wt%, 4.61wt%, 5.12wt%, 7.21wt%, 9.46wt% etc.；
The percentage composition that cerous nitrate accounts for starting material quality specifically can be 0.5wt%, 1.2wt%, 2.01wt%, 3.73wt%, 3.96wt%, 4.11wt%, 4.73wt% etc.；
The percentage composition that active carbon accounts for starting material quality specifically can be 1.96wt%, 2.15wt%, 2.61wt%, 3.10wt%, 3.9wt%, 4.02wt% etc.；
Building castoff of the invention refers to useless brick, the waste concrete, waste sand and gravel that the processes such as construction, removal, finishing generate Equal inorganic wastes；Building castoff main component include silica, aluminium oxide, iron oxide, calcium oxide, magnesia, sodium oxide molybdena, Potassium oxide and loss on ignition.
Wherein, the percentage composition that silica accounts for construction waste amount of substance specifically can be 48wt%, 49wt%, 49.9wt%, 50.2wt%, 50.47wt%, 51.7wt%, 52.2wt%, 54.4wt%, 54.8wt%, 55wt%, 57wt%, 59wt% etc.；
The percentage composition that aluminium oxide accounts for construction waste amount of substance specifically can be 16wt%, 17wt%, 18.9wt%, 20wt%, 20.4wt%, 22.4wt%, 23.7wt%, 25.2wt%, 27.8wt%, 29.6wt%, 30wt%, 31wt%, 32wt% etc.；
The percentage composition that iron oxide accounts for construction waste amount of substance specifically can be 1.8wt%, 2wt%, 2.2wt%, 2.5wt%, 2.9wt%, 3.1wt%, 3.2wt%, 3.4wt%, 3.8wt%, 4wt%, 4.2wt% etc.；
The percentage composition that calcium oxide accounts for construction waste amount of substance specifically can be 5wt%, 5.5wt%, 6wt%, 6.5wt%, 6.7wt%, 7wt%、8wt%、8.5wt%、8.9wt%、9wt%、9.8wt%、10wt%、10.2wt%、10.3wt%、10.4wt%、11wt%、 11.5wt%, 12wt%, 12.4wt%, 13wt% etc.；
The percentage composition that magnesia accounts for construction waste amount of substance specifically can be 1.8wt%, 2.0wt%, 2.4wt%, 2.9wt%, 3.1wt%, 3.2wt%, 3.5wt%, 3.7wt%, 3.8wt%, 4wt%, 4.1wt%, 4.2wt%, 4.7wt%, 4.9wt%, 5.3wt% etc.；
The percentage composition that sodium oxide molybdena accounts for construction waste amount of substance specifically can be 2.9wt%, 3wt%, 3.1wt%, 3.2wt%, 3.5wt%, 3.7wt%, 3.8wt%, 4wt%, 4.1wt%, 4.2wt%, 4.3wt% etc.；
The percentage composition that potassium oxide accounts for construction waste amount of substance specifically can be 1.5wt%, 1.9wt%, 2wt%, 2.1wt%, 2.3wt%, 2.5wt%, 2.7wt%, 3wt%, 3.2wt%, 3.5wt%, 3.8wt%, 4wt% etc.；
The percentage composition that loss on ignition accounts for construction waste amount of substance specifically can be 1.2wt%, 1.3wt%, 1.9wt%, 2.1wt%, 2.3wt%, 2.9wt%, 3.1wt%, 3.2wt%, 3.3wt%, 4.0wt%, 4.1wt%, 4.2wt% etc..
In one embodiment of the present of invention, environmentally friendly porous ceramic sound absorption material, by starting material and cornstarch through overmulling Close and sintering be made, the ratio of cornstarch quality and starting material quality specifically can be 5wt%, 7wt%, 10wt%, 12wt%, 15wt%, 16wt%, 19wt%, 20wt% etc..
In one embodiment of the present of invention, it is mixed that the distilled water of starting material and homogenous quantities is placed in ball milling in ball mill ball grinder It closes, Ball-milling Time 0.5h, 1h, 2h, 3h, 4h, 5h etc..
In one embodiment of the present of invention, it is added in the mixed process of material powder and cornstarch and is enough to keep mixture wet The distilled water of profit, crossing grit number specifically can be 30 mesh, 40 mesh, 50 mesh, 60 mesh, 70 mesh, 80 mesh etc..
In one embodiment of the present of invention, the maximum temperature of starting material and cornstarch sintering specifically can be 1100 DEG C, 1130 DEG C, 1150 DEG C, 1180 DEG C, 1200 DEG C, 1220 DEG C, 1230 DEG C etc..
In one embodiment of the present of invention, the preparation method of above-mentioned environmental protection porous ceramic sound absorption material, comprising the following steps:
Step 1: initial feed, distilled water, abrading-ball being subjected to wet ball grinding with mass ratio for 1:1:10, slurry is made；
Step 2: after slurry is carried out drying and processing, carrying out mixed grinding with cornstarch, material powder is made；
Step 3: material powder being granulated, blank is made；After blank drying and processing, it is transferred in mold and carries out at pressure maintaining Green compact are made in reason；
Step 4: after green compact are sintered in high temperature furnace, keep the temperature and are cooled down, environmental protection porous ceramics sound absorption material is made Material.
In one embodiment of the present of invention, the ratio of cornstarch quality and starting material quality in step 2 specifically may be used To be 5wt%, 7wt%, 10wt%, 12wt%, 15wt%, 16wt%, 19wt%, 20wt% etc..
Wherein, it is 0.5h, 1h, 2h, 3h, 4h, 5h, ball that the wet ball grinding Ball-milling Time in step 1, which can be Ball-milling Time, Mill speed is 300r/min, 400r/min, 500r/min ,/600r/min, 700r/min, 800r/min etc..
The drying temperature of drying and processing in step 2 specifically can be 90 DEG C, 95 DEG C, 100 DEG C, 105 DEG C, 110 DEG C etc., dry The dry time specifically can be 1h, 2h, 3h, 4h etc..
The specific drying temperature of drying and processing in step 3 specifically can be 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C, 100 DEG C etc.； Drying time specifically can be 5min, 10min, 20min, 30min, 40min, 50min etc.；
The pressure of pressure maintaining processing specifically can be 2MPa, 3MPa, 4MPa, 5MPa, 6MPa etc.；Dwell time specifically can be 1min, 2min, 3min, 4min, 5min, 6min etc..
The maximum temperature being sintered in step 4 specifically can be 1100 DEG C, 1130 DEG C, 1150 DEG C, 1180 DEG C, 1200 DEG C, 1220 DEG C, 1230 DEG C etc.；
The heating rate of sintering specifically can be 5 DEG C/min, 6 DEG C/min, 7 DEG C/min, 8 DEG C/min, 9 DEG C/min, 10 DEG C/min, 11 DEG C/min, 12 DEG C/min etc..
The time of isothermal holding specifically can be 0.8h, 1h, 1.5h, 2h, 2.5h, 3h etc..
Rate of temperature fall in cooling treatment process specifically can be 5 DEG C/min, 6 DEG C/min, 7 DEG C/min, 8 DEG C/min, 9 DEG C/min, 10 DEG C/min etc., wind cooling temperature lowering will be used after the green compact of high-temperature process cool to 500 DEG C with above-mentioned rate of temperature fall To room temperature.
In one embodiment of the present of invention, the open porosity for the environmentally friendly porous ceramic sound absorption material being prepared into specifically can be with It is 69%, 70%, 73%, 75%, 76%, 78%, 82% etc.；Average sound absorption coefficient specifically can be 0.52,0.53,0.56,0.58, 0.61,0.64 etc..
Embodiment 1
The preparation method of the environmentally friendly porous ceramic sound absorption material of the present embodiment, comprising the following steps:
Pretreatment: sawdust, reinforcing bar, paper scrap etc. be organic and fine powder of metal material for removing of obtaining from building castoff treatment plant Body places it in 500r/min ball milling 0.5h in planetary ball mill ball grinder, crosses 30 meshes.The pretreated construction waste Object, main component include accounting for the silica that building castoff weight percent is 54.4wt%, the aluminium oxide of 20.4wt%, The iron oxide of 2.9wt%, the calcium oxide of 10.2wt%, the magnesia of 4.2wt%, the sodium oxide molybdena of 3.1wt%, the potassium oxide of 1.9wt%, The loss on ignition of 2.9wt%.
Weigh pretreated building castoff 38.9wt%, aluminium oxide 43.75wt%, aluminum fluoride 7.78wt%, calcium carbonate 3.88wt%, cerous nitrate 3.73wt% and active carbon 1.96wt% form initial feed.
Step 1: initial feed, distilled water, abrading-ball are subjected to wet ball grinding, rotational speed of ball-mill with mass ratio for 1:1:10 Slurry is made in 600r/min, Ball-milling Time 2h；
Step 2: gained slurry in step 1 being crossed into 30 meshes, is subsequently placed in 90 DEG C of baking ovens and dries 2h, be then transferred to agate mortar 60 meshes are crossed in middle grinding, and material powder is made；Then gained material powder is respectively weighed 8 parts, another each alleged material powder of addition The cornstarch of gross mass 5wt% and the distilled water for being enough to keep material powder wet once again after grinding uniformly, cross 40 meshes, completion It is granulated, blank is made；
Step 3: step 2 gained blank being placed in 80 DEG C of baking ovens and dries 30min；It is then transferred in mold, pressure maintaining 1min under 6MPa, Mold is sloughed, green compact are made；
Step 4: step 3 gained green compact being put on refractory brick, are transferred in high temperature furnace, 5 DEG C/min of heating rate is warming up to 1150 DEG C, 2h is kept the temperature, then 500 DEG C is cooled to 5 DEG C/min, is then naturally cooling to room temperature, obtain a kind of porous pottery of environmental protection Porcelain sound-absorbing material.
Environmental protection porous ceramic sound absorption material water absorption rate 57% manufactured in the present embodiment, open porosity 69%, compression strength Average sound absorption coefficient 0.52 in 18MPa, 200-4000Hz frequency of sound wave, highest acoustic absorptivity are in 1250Hz, acoustic absorptivity 0.93。
The cross-section morphology scanning electron microscope (SEM) photograph of environmental protection porous ceramic sound absorption material manufactured in the present embodiment is as shown in Figure 1a.
Embodiment 2
The preparation method of the environmentally friendly porous ceramic sound absorption material of the present embodiment, comprising the following steps:
Pretreatment: sawdust, reinforcing bar, paper scrap etc. be organic and fine powder of metal material for removing of obtaining from building castoff treatment plant Body places it in 500r/min ball milling 0.5h in planetary ball mill ball grinder, crosses 40 meshes.The pretreated construction waste Object, main component include accounting for the silica that building castoff weight percent is 54.8wt%, the aluminium oxide of 18.9wt%, The iron oxide of 3.2wt%, the calcium oxide of 9.8wt%, the magnesia of 3.7wt%, the sodium oxide molybdena of 4.1wt%, the potassium oxide of 3.2wt%, The loss on ignition of 2.3wt%.
Weigh pretreated building castoff 38.90wt%, aluminium oxide 40.75wt%, aluminum fluoride 10.78wt%, calcium carbonate 2.88wt%, cerous nitrate 4.73wt% and active carbon 1.96wt% form initial feed.
Step 1: initial feed, distilled water, abrading-ball are subjected to wet ball grinding, rotational speed of ball-mill with mass ratio for 1:1:10 Slurry is made in 400r/min, Ball-milling Time 4h；
Step 2: gained slurry in step 1 being crossed into 60 meshes, is subsequently placed in 110 DEG C of baking ovens and dries 1h, be then transferred to agate and grind 40 meshes are crossed after alms bowl grinding, material powder is made；Gained material powder is respectively weighed 8 parts, another each alleged material powder of addition is total The cornstarch of quality 10wt% and the distilled water for being enough to keep material powder wet once again after grinding uniformly, cross 80 meshes, completion It is granulated, blank is made；
Step 3: step 2 gained blank is placed in 60 DEG C of baking ovens and dries 50min, is transferred in corresponding mold, pressure maintaining 4min under 4MPa, Mold is sloughed, green compact are made；
Step 4: step 3 gained green compact being placed on refractory brick, are transferred in high temperature furnace, 10 DEG C/min of heating rate is warming up to 1200 DEG C, 1h is kept the temperature, then 500 DEG C is cooled to 10 DEG C/min, is then naturally cooling to room temperature, obtain a kind of porous pottery of environmental protection Porcelain sound-absorbing material.
Environmental protection porous ceramic sound absorption material water absorption rate 61% manufactured in the present embodiment, open porosity 73%, compression strength Average sound absorption coefficient 0.58 in 21MPa, 200-4000Hz frequency of sound wave, highest acoustic absorptivity are in 1250Hz, acoustic absorptivity 0.92。
The cross-section morphology scanning electron microscope (SEM) photograph of environmental protection porous ceramic sound absorption material manufactured in the present embodiment is as shown in Figure 1 b.
Embodiment 3
The preparation method of the environmentally friendly porous ceramic sound absorption material of the present embodiment, comprising the following steps:
Pretreatment: sawdust, reinforcing bar, paper scrap etc. be organic and fine powder of metal material for removing of obtaining from building castoff treatment plant Body places it in 500r/min ball milling 0.5h in planetary ball mill ball grinder, crosses 80 meshes.The pretreated construction waste Object, main component include accounting for the silica that building castoff weight percent is 51.7wt%, the aluminium oxide of 23.7wt%, The iron oxide of 2.2wt%, the calcium oxide of 10.4wt%, the magnesia of 3.1wt%, the sodium oxide molybdena of 3.1wt%, the potassium oxide of 2.7wt%, The loss on ignition of 3.1wt%.
Weigh pretreated building castoff 42.37wt%, aluminium oxide 38.52wt%, aluminum fluoride 9.98wt%, calcium carbonate 4.61wt%, cerous nitrate 0.50wt% and active carbon 4.02wt% form initial feed.
Step 1: initial feed, distilled water, abrading-ball are subjected to wet ball grinding, rotational speed of ball-mill with mass ratio for 1:1:10 Slurry is made in 800r/min, Ball-milling Time 0.5h；
Step 2: gained slurry in step 1 being crossed into 60 meshes, is subsequently placed in 90 DEG C of baking ovens and dries 4h, be then transferred to agate mortar After grinding, 60 meshes are crossed, material powder is made；Gained material powder is respectively weighed 8 parts, the total matter of another each alleged material powder of addition It measures the cornstarch of 15wt% and is enough the distilled water for keeping material powder wet, once again after grinding uniformly, cross 30 meshes, complete to make Blank is made in grain；
Step 3: step 2 gained blank being placed in 80 DEG C of baking ovens and dries 30min；It is then transferred in corresponding mold, is protected under 2MPa 6min is pressed, mold is sloughed, green compact are made；
Step 4: step 3 gained green compact being placed on refractory brick, are transferred in high temperature furnace, 12 DEG C/min of heating rate is warming up to 1100 DEG C, 3h is kept the temperature, then 500 DEG C is cooled to 5 DEG C/min, is then naturally cooling to room temperature, obtain a kind of porous pottery of environmental protection Porcelain sound-absorbing material.
Environmental protection porous ceramic sound absorption material water absorption rate 73% manufactured in the present embodiment, open porosity 82%, compression strength Average sound absorption coefficient 0.64 in 17MPa, 200-4000Hz frequency of sound wave, highest acoustic absorptivity are in 1600Hz, acoustic absorptivity 0.94。
The cross-section morphology scanning electron microscope (SEM) photograph of environmental protection porous ceramic sound absorption material manufactured in the present embodiment is as illustrated in figure 1 c.
Embodiment 4
The preparation method of the environmentally friendly porous ceramic sound absorption material of the present embodiment, comprising the following steps:
Pretreatment: sawdust, reinforcing bar, paper scrap etc. be organic and fine powder of metal material for removing of obtaining from building castoff treatment plant Body places it in 500r/min ball milling 0.5h in planetary ball mill ball grinder, crosses 60 meshes.The pretreated construction waste Object, main component include accounting for the silica that building castoff weight percent is 49.9wt%, the aluminium oxide of 29.6wt%, The iron oxide of 3.4wt%, the calcium oxide of 6.7wt%, the magnesia of 3.8wt%, the sodium oxide molybdena of 3.2wt%, the potassium oxide of 2.3wt%, The loss on ignition of 1.3wt%.
Weigh pretreated building castoff 50.47wt%, aluminium oxide 33.52wt%, aluminum fluoride 2.25wt%, calcium carbonate 9.46wt%, cerous nitrate 1.20wt% and active carbon 3.10wt% form initial feed.
Step 1: initial feed, distilled water, abrading-ball are subjected to wet ball grinding, rotational speed of ball-mill with mass ratio for 1:1:10 Slurry is made in 300r/min, Ball-milling Time 5h；
Step 2: gained slurry in step 1 being crossed into 30 meshes, is placed in 90 DEG C of baking ovens and dries 4h, be then transferred to agate mortar grinding 80 meshes are crossed afterwards, and material powder is made；Finally, gained material powder respectively weighs 8 parts, another each alleged material powder gross mass of addition The cornstarch of 20wt% and the distilled water for being enough to keep material powder wet once again after grinding uniformly, cross 40 meshes, and completion is granulated, Blank is made；
Step 3: step 2 gained blank is placed in 100 DEG C of baking oven drying 5min；It is then transferred in corresponding mold, is protected under 4MPa 1min is pressed, mold is sloughed, green compact are made；
Step 4: step 3 gained green compact being placed on refractory brick, are transferred in high temperature furnace, 12 DEG C/min of heating rate is warming up to 1230 DEG C, 0.8h is kept the temperature, then 500 DEG C is cooled to 5 DEG C/min, is then naturally cooling to room temperature, it is porous to obtain a kind of environmental protection Ceramic sound-absorbing material.
Environmental protection porous ceramic sound absorption material water absorption rate 63% manufactured in the present embodiment, open porosity 78%, compression strength Average sound absorption coefficient 0.61 in 21MPa, 200-4000Hz frequency of sound wave, highest acoustic absorptivity are in 1600Hz, acoustic absorptivity 0.95。
The cross-section morphology scanning electron microscope (SEM) photograph of environmental protection porous ceramic sound absorption material manufactured in the present embodiment is as shown in Figure 1 d.
The environmentally friendly porous sound absorption ceramic material property testing result of table 1
It can be seen from Table 1 that present invention environmental protection sound absorption porous material aperture opening ratio is big, bending strength is big, and sound absorbing performance is excellent.
Above embodiments are only presently preferred embodiments of the present invention, are not intended to limit the invention, all of the invention Any modifications, equivalent replacements, and improvements etc. done within spirit and principle, should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of environmental protection porous ceramic sound absorption material, which is characterized in that the environmental protection porous ceramic sound absorption material is by starting material It is made with cornstarch by mixing, granulation, dry, molding and sintering, the cornstarch quality is the starting material matter The 5wt%-20wt% of amount.
2. environmental protection porous ceramic sound absorption material as described in claim 1, which is characterized in that the starting material is by inorganic mixing Object and active carbon are made by ball milling mixing and drying, and the inorganic mixture includes accounting for the starting material mass ratio The building castoff of 38.9-50.47wt%, the aluminium oxide of 33.52-43.75wt%, 2.25-10.78wt% aluminum fluoride, 2.88- The calcium carbonate of 9.46wt% and the cerous nitrate of 0.5-4.73wt%, the mass ratio that the active carbon accounts for starting material is 1.96- 4.02wt%。
3. environmental protection porous ceramic sound absorption material as claimed in claim 2, which is characterized in that the building castoff it is main at Dividing includes inorganic compound and loss on ignition, and the inorganic compound includes the dioxy for accounting for building castoff mass ratio 48-59wt% The oxidation of SiClx, the aluminium oxide of 16-32wt%, the iron oxide of 1.8-4.2wt%, the calcium oxide of 5.0-13.0wt%, 1.8-5.3wt% Magnesium, the sodium oxide molybdena of 2.9-4.3wt%, 1.5-4.0wt% potassium oxide；The loss on ignition accounts for the mass ratio of the building castoff For 1.2-4.2wt%.
4. environmental protection porous ceramic sound absorption material as described in claim 1, which is characterized in that the temperature of the sintering is 1100- 1230 DEG C, the heating rate in the sintering process is 5-12 DEG C/min.
5. environmental protection porous ceramic sound absorption material as described in claim 1, which is characterized in that the environmental protection porous ceramics sound absorption material The open porosity of material is 69%-82%, average sound absorption coefficient 0.52-0.64.
6. the preparation of any one environmentally friendly porous ceramic sound absorption material such as claim 1-5, which is characterized in that specific steps are as follows:
Step 1: the starting material and solvent being subjected to ball milling mixing, slurry is made；
Step 2: after the slurry is carried out drying and processing, carrying out ground and mixed with cornstarch, material powder is made；
Step 3: the material powder being granulated, and after doing drying and processing, be transferred to progress pressure maintaining processing in mold, be made Green compact；
Step 4: the environmentally friendly porous ceramics is obtained after the green compact are sintered in high temperature furnace, keep the temperature and are cooled down Sound-absorbing material.
7. the preparation of environmental protection porous ceramic sound absorption material as claimed in claim 6, which is characterized in that described in the step 1 Ball milling uses wet ball grinding method, and the mass ratio of the raw material, solvent and abrading-ball is 1:1:10, Ball-milling Time 0.5-5h, ball Mill speed is 300-800r/min.
8. the preparation of environmental protection porous ceramic sound absorption material as claimed in claim 6, which is characterized in that the jade in the step 2 Rice starch quality is the 5-20wt% of the starting material quality.
9. the preparation of environmental protection porous ceramic sound absorption material as claimed in claim 6, which is characterized in that pressure maintaining in the step 3 The pressure of processing is 2-6MPa, dwell time 1-6min.
10. the preparation of environmental protection porous ceramic sound absorption material as claimed in claim 6, which is characterized in that be sintered in the step 4 Temperature is 1100-1230 DEG C, and the heating rate of the sintering is 5-12 DEG C/min, and the processing time of the heat preservation is 0.8-3h.
CN201910873119.2A 2019-09-17 2019-09-17 A kind of environmental protection porous ceramic sound absorption material and preparation method thereof Pending CN110526734A (en)

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