CN107265959A - A kind of antibacterial, heat insulating insulation material and preparation method thereof - Google Patents
A kind of antibacterial, heat insulating insulation material and preparation method thereof Download PDFInfo
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- CN107265959A CN107265959A CN201710663039.5A CN201710663039A CN107265959A CN 107265959 A CN107265959 A CN 107265959A CN 201710663039 A CN201710663039 A CN 201710663039A CN 107265959 A CN107265959 A CN 107265959A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
- C04B41/90—Coating or impregnation for obtaining at least two superposed coatings having different compositions at least one coating being a metal
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2092—Resistance against biological degradation
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a kind of antibacterial, heat insulating insulation material and preparation method thereof, the preparation of material matrix：By 40 50 parts of cement, 15 25 parts of clay, 10 15 parts of modified attapulgite, 25 parts of titanium dioxide, 13 parts of talcum powder, 25 40 parts of mixing of water, send into mortar mixer and be uniformly mixing to obtain material A；10 15 parts of urea-formaldehyde resin solution, 20 25 parts of vinyl ester resinses solution, 58 parts of additions of asphalt base carbon fiber are continued to stir；Temperature is then increased to 70 80 DEG C, by 8 15 parts of 30 40% hydrogen peroxide, 5 10 parts of additions of polyacrylamide, continues the 3h of stirring reaction 1；Drying can obtain material matrix after cooling；The preparation of antibacterial insulation material：Using magnetron sputtering coater, by the first depositing Ti O2 films in material matrix surface；Subsequent redeposition Ag films at room temperature；It can obtain the antibacterial, heat insulating insulation material.
Description
Technical field
The invention belongs to heat-insulating heat-preserving material field, more particularly to a kind of antibacterial, heat insulating insulation material and preparation method thereof.
Background technology
Insulation material generally refers to the material that thermal conductivity factor is less than or equal to 0.12.With expanding economy, people's lives
The raising of level, insulation material Materials quickly, use good heat preservation technology and material in industry and building, often may be used
To play a multiplier effect.Often one ton of oil can be saved within 1 year, for me using one ton of mineral wool insulating product in building
The national conditions of state's energy reserves wretched insufficiency, heat insulating energy saving material then becomes particularly significant.
In the prior art because insulation material is generally used for industry or construction wall, therefore insulation material is usually easily dirty
Dye, after pollution, insulation material then loses its original attribute, does not reach the effect of energy-conservation.Wall heat insulation material is built as influence
One key factor of energy-conservation is built, it is developed with application increasingly by the most attention of countries in the world.Reasonable development wall
Insulation material, can largely save materials for wall, improve wall insulation performance, can reach and economize on resources again, reduce environmental pollution
Purpose.When ambient humidity is big, especially southern plum rain season when, the phenomenon of " extension water " often occurs in wall；When wall is protected
Temperature is not carried out, when causing indoor/outdoor temperature-difference larger, water in room air to the cold after will be agglomerated on metope, cause wall
It is moist；Wall humidity is easy to produce mycete on wall over time.Mycete on wall is a kind of observability biological flora, also known as wall
Mildew, mould cancer etc., it is most common to have grape ear bacterium and aspergillus niger etc..The conidia powder of mycete on wall is with air flow, Long Term Contact
Suction, can trigger breathing problem and allergic symptom, such as bronchitis, tonsillitis, Hay Fever, asthma etc..Mycete on wall
Substantial amounts of hepatitis viruse and influenza virus can be hidden, the low people of immunity touches or even can also cause headache, had a fever, skin or
Mucous membrane inflammation.So, prevention mycete on wall is the problem of highly causing concern.Therefore, exploitation one kind possesses antibacterial, heat insulating
The construction material of heat insulation effect, then can application it is more extensive.
The content of the invention
For drawbacks described above, it is an object of the invention to provide a kind of antibacterial, heat insulating insulation material and preparation method thereof, pass through
TiO is sputtered on material matrix surface2Film/Ag films, improves the anti-microbial property of antibacterial, heat insulating insulation material.
A kind of preparation method of antibacterial, heat insulating insulation material, is comprised the following steps：
(1) preparation of material matrix：
By 40-50 parts of cement, 15-25 parts of clay, 10-15 parts of modified attapulgite, 2-5 parts of titanium dioxide, 1-3 parts of talcum powder,
Material A is uniformly mixing to obtain in 25-40 parts of mixing of water, feeding mortar mixer；By 10-15 parts of urea-formaldehyde resin solution, alicyclic vinyl
20-25 parts of resin solution, 5-8 parts of additions of asphalt base carbon fiber continue to stir；Temperature is then increased to 70-80 DEG C, will
8-15 parts of 30-40% hydrogen peroxide, 5-10 parts of additions of polyacrylamide, continue stirring reaction 1-3h；Drying can be obtained after cooling
To material matrix；
(2) preparation of antibacterial insulation material：
Using magnetron sputtering coater, by the first depositing Ti O2 films in the material matrix surface obtained in step (1)；Then in room
The lower redeposition Ag films of temperature；It can obtain the antibacterial, heat insulating insulation material.
It is preferred that, 45 parts of cement described in step (1), 20 parts of clay, 13 parts of modified attapulgite, 4 parts of titanium dioxide, talcum powder
2 parts, 35 parts of water.
It is preferred that, the modified attapulgite process is as follows：10-12 parts of 8-10 parts of folium artemisiae argyi and purslane are added into acetic acid 20-
In 25 parts of solution, 60-80 DEG C is heated to, 20-40min is stirred, 10-14 parts of concave convex rod is added, 6-8h is soaked, dried after filtering
It is standby.
It is preferred that, 13 parts of urea-formaldehyde resin solution described in step (1), 22 parts of vinyl ester resinses solution, pitch base carbon are fine
6 parts of dimension.
It is preferred that, temperature is increased to 70-80 DEG C by step in (1), and 12 parts of hydrogen peroxide, 8 parts of polyacrylamide are added, after
Continuous stirring reaction 2.5h.
It is preferred that, the thickness of TiO2 films described in step (2) is 50-80nm；The thickness of the Ag films is 30-50nm.
It is preferred that, the TiO2The sedimentary condition of film is：25-28 DEG C, vacuum 0.6 × 10-4-0.8×10-4Pa, sputters gas
Press as 0.03-0.035mbar, sputtering power is 120-150W.
It is preferred that, the sedimentary condition of the Ag films is：28-30 DEG C, vacuum 0.8 × 10-4-1.2×10-4Pa, sputtering pressure
For 0.02-0.025mbar, sputtering power is 80-100W.
Compared with prior art, its advantage is the present invention：
A kind of preparation method of heat insulating inorganic material of the present invention, material is prepared by the concave convex rod for introducing modified
Matrix is expected, while forming TiO on material matrix surface using sputtering technology2Film/Ag films, improves antibacterial, heat insulating insulation material
Anti-microbial property, it is to avoid the mouldy immunity infringement brought to human body of material；In addition, the introducing of asphalt base carbon fiber of the present invention increases
The intensity and toughness of insulation material are added, have improved its combination property, widen application field.
Embodiment
The present invention is further illustrated with reference to embodiments.
Embodiment 1
(1) preparation of material matrix：
By 40 parts of cement, 15 parts of clay, 10 parts of modified attapulgite, 5 parts of titanium dioxide, 1 part of talcum powder, 25 parts of mixing of water, send
Enter to be uniformly mixing to obtain material A in mortar mixer；Temperature is then increased to 80 DEG C, by 15 parts of 30-40% hydrogen peroxide, polypropylene
5 parts of additions of acid amides, continue stirring reaction 1h；Drying can obtain material matrix after cooling；Wherein, modified attapulgite process is such as
Under：10 parts of 8 parts of folium artemisiae argyi and purslane are added in 20 parts of solution of acetic acid, 80 DEG C is heated to, stirs 20min, add concave convex rod
10 parts, soak 6h, dry for standby after filtering.
(2) preparation of antibacterial insulation material：
Using magnetron sputtering coater, by the first depositing Ti O in the material matrix surface obtained in step (1)2Film；Then in room
The lower redeposition Ag films of temperature；It can obtain the antibacterial, heat insulating insulation material；The TiO2The sedimentary condition of film is：25 DEG C, vacuum
0.8×10-4Pa, sputtering pressure is 0.03mbar, and sputtering power is 150W；The sedimentary condition of the Ag films is：30 DEG C, vacuum
1.2×10-4Pa, sputtering pressure is 0.025mbar, and sputtering power is 100W.
Embodiment 2
(1) preparation of material matrix：
By 50 parts of cement, 25 parts of clay, 15 parts of modified attapulgite, 2 parts of titanium dioxide, 3 parts of talcum powder, 40 parts of mixing of water, send
Enter to be uniformly mixing to obtain material A in mortar mixer；Temperature is then increased to 70 DEG C, by 8 parts of 30-40% hydrogen peroxide, polypropylene
10 parts of additions of acid amides, continue stirring reaction 3h；Drying can obtain material matrix after cooling；Wherein, modified attapulgite process
It is as follows：12 parts of 10 parts of folium artemisiae argyi and purslane are added in 25 parts of solution of acetic acid, 60 DEG C is heated to, stirs 40min, add bumps
14 parts of rod, soaks 8h, dry for standby after filtering.
(2) preparation of antibacterial insulation material：
Using magnetron sputtering coater, by the first depositing Ti O in the material matrix surface obtained in step (1)2Film；Then in room
The lower redeposition Ag films of temperature；It can obtain the antibacterial, heat insulating insulation material；The TiO2The sedimentary condition of film is：28 DEG C, vacuum
0.6×10-4Pa, sputtering pressure is 0.035mbar, and sputtering power is 120W；The sedimentary condition of the Ag films is：30 DEG C, vacuum
1.2×10-4Pa, sputtering pressure is 0.02mbar, and sputtering power is 80W.
Embodiment 3
(1) preparation of material matrix：
By 45 parts of cement, 18 parts of clay, 12 parts of modified attapulgite, 3 parts of titanium dioxide, 1 part of talcum powder, 30 parts of mixing of water, send
Enter to be uniformly mixing to obtain material A in mortar mixer；By 10 parts of urea-formaldehyde resin solution, 20 parts of vinyl ester resinses solution, asphaltic base
8 parts of additions of carbon fiber continue to stir；Temperature is then increased to 70 DEG C, by 7 parts of 30-40% hydrogen peroxide, polyacrylamide 6
Part adds, and continues stirring reaction 1.5h；Drying can obtain material matrix after cooling；Wherein, modified attapulgite process is as follows：
10 parts of 10 parts of folium artemisiae argyi and purslane are added in 20 parts of solution of acetic acid, 65 DEG C is heated to, stirs 25min, add concave convex rod 12
Part, soak 8h, dry for standby after filtering.
(2) preparation of antibacterial insulation material：
Using magnetron sputtering coater, by the first depositing Ti O in the material matrix surface obtained in step (1)2Film；Then in room
The lower redeposition Ag films of temperature；It can obtain the antibacterial, heat insulating insulation material；The TiO2The sedimentary condition of film is：25 DEG C, vacuum
0.8×10-4Pa, sputtering pressure is 0.03mbar, and sputtering power is 150W；The sedimentary condition of the Ag films is：30 DEG C, vacuum
1.2×10-4Pa, sputtering pressure is 0.025mbar, and sputtering power is 100W.
Embodiment 4
(1) preparation of material matrix：
By 50 parts of cement, 20 parts of clay, 15 parts of modified attapulgite, 5 parts of titanium dioxide, 3 parts of talcum powder, 35 parts of mixing of water, send
Enter to be uniformly mixing to obtain material A in mortar mixer；By 15 parts of urea-formaldehyde resin solution, 25 parts of vinyl ester resinses solution, asphaltic base
5 parts of additions of carbon fiber continue to stir；Temperature is then increased to 75 DEG C, by 10 parts of 30-40% hydrogen peroxide, polyacrylamide
8 parts of additions, continue stirring reaction 2.5h；Drying can obtain material matrix after cooling；Wherein, modified attapulgite process is such as
Under：12 parts of 8 parts of folium artemisiae argyi and purslane are added in 25 parts of solution of acetic acid, 75 DEG C is heated to, stirs 30min, add concave convex rod
14 parts, soak 6h, dry for standby after filtering.
(2) preparation of antibacterial insulation material：
Using magnetron sputtering coater, by the first depositing Ti O in the material matrix surface obtained in step (1)2Film；Then in room
The lower redeposition Ag films of temperature；It can obtain the antibacterial, heat insulating insulation material；The TiO2The sedimentary condition of film is：28 DEG C, vacuum
0.6×10-4Pa, sputtering pressure is 0.035mbar, and sputtering power is 120W；The sedimentary condition of the Ag films is：30 DEG C, vacuum
1.2×10-4Pa, sputtering pressure is 0.02mbar, and sputtering power is 80W.
Embodiment 5
(1) preparation of material matrix：
By 45 parts of cement, 20 parts of clay, 13 parts of modified attapulgite, 4 parts of titanium dioxide, 2 parts of talcum powder, 35 parts of mixing of water, send
Enter to be uniformly mixing to obtain material A in mortar mixer；By 13 parts of urea-formaldehyde resin solution, 22 parts of vinyl ester resinses solution, asphaltic base
6 parts of additions of carbon fiber continue to stir；Temperature is then increased to 77 DEG C, by 12 parts of 30-40% hydrogen peroxide, polyacrylamide
8 parts of additions, continue stirring reaction 2.5h；Drying can obtain material matrix after cooling；Wherein, modified attapulgite process is such as
Under：11 parts of 9 parts of folium artemisiae argyi and purslane are added in 22 parts of solution of acetic acid, 70 DEG C is heated to, stirs 35min, add concave convex rod
12 parts, soak 7h, dry for standby after filtering.
(2) preparation of antibacterial insulation material：
Using magnetron sputtering coater, by the first depositing Ti O in the material matrix surface obtained in step (1)2Film；Then in room
The lower redeposition Ag films of temperature；It can obtain the antibacterial, heat insulating insulation material；The TiO2The sedimentary condition of film is：26 DEG C, vacuum
0.65×10-4Pa, sputtering pressure is 0.032mbar, and sputtering power is 125W；The sedimentary condition of the Ag films is：30 DEG C, vacuum
1.0×10-4Pa, sputtering pressure is 0.02mbar, and sputtering power is 95W.
Correlated performance test is carried out to the antibacterial, heat insulating insulation material obtained by each above-mentioned embodiment, detailed results are seen below
Table：
| Experiment | Thermal conductivity factor (W/ (mk)) | Compression strength (MPa) | To staphylococcus aureus (1h, %) |
| Embodiment 1 | 0.019 | 0.89 | 93.4 |
| Embodiment 2 | 0.018 | 0.95 | 92.6 |
| Embodiment 3 | 0.016 | 1.49 | 96.9 |
| Embodiment 4 | 0.015 | 1.58 | 97.8 |
| Embodiment 5 | 0.015 | 1.60 | 98.6 |
The invention is not restricted to embodiment here, those skilled in the art according to the improvement made of announcement of the present invention and
Modification all should be within protection scope of the present invention.
Claims (8)
1. a kind of preparation method of antibacterial, heat insulating insulation material, it is characterised in that comprise the following steps：
(1) preparation of material matrix：
By 40-50 parts of cement, 15-25 parts of clay, 10-15 parts of modified attapulgite, 2-5 parts of titanium dioxide, 1-3 parts of talcum powder, water 25-
Material A is uniformly mixing to obtain in 40 parts of mixing, feeding mortar mixer；10-15 parts of urea-formaldehyde resin solution, vinyl ester resinses are molten
20-25 parts of liquid, 5-8 parts of additions of asphalt base carbon fiber continue to stir；Temperature is then increased to 70-80 DEG C, by 30-40%
8-15 parts of hydrogen peroxide, 5-10 parts of additions of polyacrylamide, continue stirring reaction 1-3h；Drying can obtain material base after cooling
Body；
(2) preparation of antibacterial insulation material：
Using magnetron sputtering coater, by the first depositing Ti O in the material matrix surface obtained in step (1)2Film；Then at room temperature
Redeposited Ag films；It can obtain the antibacterial, heat insulating insulation material.
2. the preparation method of a kind of antibacterial, heat insulating insulation material according to claim 1, it is characterised in that in step (1)
45 parts of the cement, 20 parts of clay, 13 parts of modified attapulgite, 4 parts of titanium dioxide, 2 parts of talcum powder, 35 parts of water.
3. the preparation method of a kind of antibacterial, heat insulating insulation material according to claim 1 or 2, it is characterised in that described to change
Property concavo-convex rod motion it is as follows：10-12 parts of 8-10 parts of folium artemisiae argyi and purslane are added in 20-25 parts of solution of acetic acid, 60-80 is heated to
DEG C, 20-40min is stirred, 10-14 parts of concave convex rod is added, 6-8h, dry for standby after filtering is soaked.
4. the preparation method of a kind of antibacterial, heat insulating insulation material according to claim 1, it is characterised in that in step (1)
13 parts of the urea-formaldehyde resin solution, 22 parts of vinyl ester resinses solution, 6 parts of asphalt base carbon fiber.
5. the preparation method of a kind of antibacterial, heat insulating insulation material according to claim 1, it is characterised in that in step (1)
Temperature is increased to 70-80 DEG C, by 12 parts of hydrogen peroxide, 8 parts of additions of polyacrylamide, continues stirring reaction 2.5h.
6. the preparation method of a kind of antibacterial, heat insulating insulation material according to claim 1, it is characterised in that in step (2)
The TiO2The thickness of film is 50-80nm；The thickness of the Ag films is 30-50nm.
7. a kind of preparation method of antibacterial, heat insulating insulation material according to claim 5, it is characterised in that the TiO2Film
Sedimentary condition be：25-28 DEG C, vacuum 0.6-0.8 × 10-4Pa, sputtering pressure is 0.03-0.035mbar, and sputtering power is
120-150W。
8. the preparation method of a kind of antibacterial, heat insulating insulation material according to claim 5, it is characterised in that the Ag films
Sedimentary condition is：28-30 DEG C, vacuum 0.8 × 10-4-1.2×10-4Pa, sputtering pressure is 0.02-0.025mbar, sputtering power
For 80-100W.
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| CN102898096A (en) * | 2012-09-21 | 2013-01-30 | 安徽德禾建筑节能科技有限公司 | Rice husk ash-containing light partition board for buildings |
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Application publication date: 20171020 |