CN108640704A - A kind of gypsum based phase-change material anti-fire door core board and preparation method thereof - Google Patents
A kind of gypsum based phase-change material anti-fire door core board and preparation method thereof Download PDFInfo
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- CN108640704A CN108640704A CN201810423974.9A CN201810423974A CN108640704A CN 108640704 A CN108640704 A CN 108640704A CN 201810423974 A CN201810423974 A CN 201810423974A CN 108640704 A CN108640704 A CN 108640704A
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- fire door
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/16—Fireproof doors or similar closures; Adaptations of fixed constructions therefor
-
- 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
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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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
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Special Wing (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a kind of gypsum based phase-change material anti-fire door core boards and preparation method thereof, including following raw material to form, by weight：Desulfurization gypsum powder：50~70, glass bead aggregate：40~65, bentonite：8~45, water：90~150, retarder：0.5~1.5, water-reducing agent：0.5~2, foaming agent：0.5~1, fiber：0.2~1, phase-change material：10~40；Wherein, the phase-change material, including following raw material composition, by weight：Lauric acid：40~60；Capric acid：40~60.The present invention have many advantages, such as production cost is low, intensity is high, waterproof, fire prevention, indeformable, halogenation, especially, anti-fire door core board proposed by the present invention inhales the storage and release that heat release carries out energy using the phase transformation of phase-change material, is effectively increased thermal inertia, improves temperature fluctuation ability.
Description
Technical field
The present invention relates to building product fields, and in particular to a kind of gypsum based phase-change material anti-fire door core board and its preparation side
Method.
Background technology
Fire resistant doorsets have closing, fire prevention, the multi-functionals such as partition, safety, heat preservation, sound insulation and practicability, become building
In an essential component part, and anti-fire door core board is the core material of fire resistant doorsets.Domestic existing fire-resistant door core master
Be divided into it is following several, the first be using expanded perlite as primary raw material, be made through high temperature hot pressing technique, this fire-resistant door core
Plate low production efficiency, of high cost, easy dusting, water absorption rate are high, and pollute the environment in process of production.Second with magnesia cement
For anti-fire door core board made of primary raw material, halogen phenomenon can be returned in use, and hardness declines yielding, magnesite board fire resistance
Can be poor, 400 DEG C start decomposition, dusting, in addition, magnesium chloride resolves into chlorion and magnesium ion, steel door-plate can be caused to corrode
It gets rusty, reduces the service life of door；, with anti-fire door core board made of foam cement, drying shrinkage is big, water absorption rate is high, leads to it for the third
Hardness declines, and has a great impact to its fire protecting performance.And the requirement with user to environmental-protecting performance is higher and higher, to Novel ring
The anti-fire door core board demand of guarantor is also increasing.
Invention content
In view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of gypsum based phase-change material fire-resistant door cores
Plate and preparation method thereof.Desulfurization gypsum powder derives from a wealth of sources, have production cost is low, intensity is high, waterproof, fire prevention, it is indeformable, do not return
The advantages that halogen, especially, anti-fire door core board proposed by the present invention, inhale the storage that heat release carries out energy using the phase transformation of phase-change material
And release, it is effectively increased thermal inertia, improves temperature fluctuation ability, while making anti-fire door core board that there is lower heat conduction system
Number, heat-insulating capability is preferable, and the present invention uses the bentonite with porous structure as carrier adsorption phase-change material, makes the present invention's
Anti-fire door core board phase transition performance is stable and intensity is high.
Technical scheme is as follows：
A kind of gypsum based phase-change material anti-fire door core board, including following raw material composition, by weight：Desulfurization gypsum powder：
50~70, glass bead aggregate：40~65, bentonite：8~45, water：90~150, retarder：0.5~1.5, water-reducing agent：0.5
~2, foaming agent：0.5~1, fiber：0.2~1, phase-change material：10~40；
Wherein, the phase-change material, including following raw material composition, by weight：Lauric acid：40~60；Capric acid：40~
60。
Further, the water-reducing agent is naphthalene water reducer or poly carboxylic acid series water reducer.
Further, the foaming agent is protein type foaming agent or compound foaming agent.
Further, the gypsum based phase-change material anti-fire door core board, including following raw material composition, raw material is by weight
The optimum proportioning of meter is：Desulfurization gypsum powder：60, glass bead aggregate：50, bentonite：25, water：120, retarder：0.5, diminishing
Agent：1, foaming agent：0.7, fiber：0.5, phase-change material：30；
Wherein, the phase-change material, including following raw material form, and the optimum proportioning of raw material by weight is：Lauric acid：
50；Capric acid：50.
Further, the fiber is polyester fiber or/and pencil Monofilament polypropylene fibres.
Further, the retarder is protide calcium sulphate retarder.
Further, the preparation method of the gypsum based phase-change material anti-fire door core board, includes the following steps：
(1) foaming agent is diluted with water, extension rate is 20~25 times, is steeped by special-purpose air foaming mechanism for foaming agent is gone out
Foam；
(2) by desulfurization gypsum powder, fiber, water-reducing agent, retarder is added to the water, stirs evenly；
(3) it is mixed into foaming agent foam in gypsum mixed slurry；
(4) glass bead aggregate, bentonite, phase-change material are added in foaming plaster slurry to be mixed evenly, obtain
Gypsum base phase transformation slurry；
(5) take with the matched mold of the gypsum based phase-change material anti-fire door core board shape, by above-mentioned gypsum base phase transformation starch
Material pours the bottom that thickness is 4~5mm in the mold；It is laid with grid cloth on the bottom；
(6) then, the slurry is poured for the second time to the thickness of 42~45mm；
(7) it is laid with grid cloth；
(8) then, the gypsum base phase transformation slurry is poured for the third time, and thickness is 4~5mm；
(9) it is set only under room temperature 5~10 days, obtains gypsum based phase-change material anti-fire door core board.
Compared with prior art, the invention avoids the uses to magnesite material, to the gypsum base phase transformation material of the present invention
Material anti-fire door core board, which not will produce, to get damp, returns halogen phenomenon；The storage that energy is carried out using phase-change material phase transformation is a Novel ring
Power-saving technology is protected, phase-change accumulation energy, which can alleviate energy dissipation, to be reasonable energy utilization and mitigates the effective way of environmental pollution, this
It invents the anti-fire door core board proposed and inhales the storage and release that heat release carries out energy using the phase transformation of phase-change material, be effectively increased
Thermal inertia improves temperature fluctuation ability, while anti-fire door core board being made to have lower thermal coefficient, heat-insulating capability preferable.This
Invention uses the bentonite with porous structure as carrier adsorption phase-change material, the porous media prepared using physisorphtion
Phase-change material, preparation process is simple, need to only be incorporated phase-change material into porous media by simply stirring fusion, so that it may with
Graininess sizing phase-change material is prepared, keeps the anti-fire door core board phase transition performance of the present invention stable and High anti bending strength, has good
Environmental-protecting performance.For refractory temperature up to 1000 degrees Celsius or more, combustibility is A1 grades, belongs to incombustible material, fire safety performance
It is superior.
Specific implementation mode
The present invention provides a kind of gypsum based phase-change material anti-fire door core board and preparation method thereof, for make the purpose of the present invention,
Technical solution and effect are clearer, clear, and the present invention is described in more detail below.It should be appreciated that described herein
Specific embodiment is only used to explain the present invention, is not intended to limit the present invention.
Embodiment 1
The gypsum based phase-change material anti-fire door core board, is made of following raw material, raw material is calculated as by weight：Desulfurated plaster
Powder：60, glass bead aggregate：50, bentonite：25, water：120, retarder：0.5, water-reducing agent：1, foaming agent：0.7, fiber：
0.5, phase-change material：30；
Wherein, the phase-change material, including following raw material composition, by weight：Lauric acid：50；Capric acid：50.
The wherein described retarder is protide calcium sulphate retarder, and the water-reducing agent is naphthalene water reducer, and the foaming agent is
Protein type foaming agent, the fiber are polyester fiber.
The preparation method of the gypsum based phase-change material anti-fire door core board, includes the following steps：
(1) foaming agent is diluted with water, extension rate is 20 times, by special-purpose air foaming mechanism it is standby go out foaming agent foam；
(2) by desulfurization gypsum powder, fiber, water-reducing agent, retarder is added to the water, stirs evenly；
(3) it is mixed into foaming agent foam in gypsum mixed slurry；
(4) glass bead aggregate, bentonite, phase-change material are added in foaming plaster slurry to be mixed evenly, obtain
Gypsum base phase transformation slurry；
(5) take with the matched mold of the gypsum based phase-change material anti-fire door core board shape, by above-mentioned gypsum base phase transformation starch
Material pours the bottom that thickness is 4mm in the mold；It is laid with grid cloth on the bottom；
(6) then, the slurry is poured for the second time to the thickness of 45mm；
(7) it is laid with grid cloth；
(8) then, the gypsum base phase transformation slurry, thickness 4mm are poured for the third time；
(9) it is set only under room temperature 10 days, obtains gypsum based phase-change material anti-fire door core board.
The finished product anti-fire door core board of embodiment 1 learns after tested, density 398kg/m3, flexural strength 1.2Mpa, resistance to combustion temperature
1000~1200 DEG C of degree, fire endurance 2h.
Embodiment 2
The gypsum based phase-change material anti-fire door core board, is made of following raw material, raw material is calculated as by weight：Desulfurated plaster
Powder：50, glass bead aggregate：40, bentonite：10, water：90, retarder：0.5, water-reducing agent：0.5, foaming agent：0.5, fiber：
0.2, phase-change material：10；
Wherein, the phase-change material, including following raw material composition, by weight：Lauric acid：40；Capric acid：60.
The wherein described retarder is protide calcium sulphate retarder, and the water-reducing agent is poly carboxylic acid series water reducer, the foaming
Agent is animal protein foaming agent, and the fiber is pencil Monofilament polypropylene fibres.
The preparation method of the gypsum based phase-change material anti-fire door core board, includes the following steps：
(1) foaming agent is diluted with water, extension rate is 20 times, by special-purpose air foaming mechanism it is standby go out foaming agent foam；
(2) by desulfurization gypsum powder, fiber, water-reducing agent, retarder is added to the water, stirs evenly；
(3) it is mixed into foaming agent foam in gypsum mixed slurry；
(4) glass bead aggregate, bentonite, phase-change material are added in foaming plaster slurry to be mixed evenly, obtain
Gypsum base phase transformation slurry；
(5) take with the matched mold of the gypsum based phase-change material anti-fire door core board shape, by above-mentioned gypsum base phase transformation starch
Material pours the bottom that thickness is 5mm in the mold；It is laid with grid cloth on the bottom；
(6) then, the slurry is poured for the second time to the thickness of 42mm；
(7) it is laid with grid cloth；
(8) then, the gypsum base phase transformation slurry, thickness 5mm are poured for the third time；
(9) it is set only under room temperature 10 days, obtains gypsum based phase-change material anti-fire door core board.
Finished product anti-fire door core board in embodiment 2 learns after tested, density 378kg/m3, flexural strength 1.5Mpa, resistance to combustion
1000~1200 DEG C of temperature, fire endurance 2h.
Embodiment 3
The gypsum based phase-change material anti-fire door core board, is made of following raw material, raw material is calculated as by weight：Desulfurated plaster
Powder：70, glass bead aggregate：65, bentonite：45, water：150, retarder：1.5, water-reducing agent：2, foaming agent：1, fiber：1, phase
Become material：40；
Wherein, the phase-change material, including following raw material composition, by weight：Lauric acid：60；Capric acid：40.
The wherein described retarder is protide calcium sulphate retarder, and the water-reducing agent is poly carboxylic acid series water reducer, the foaming
Agent is compound foaming agent, the fiber be polyester fiber or with pencil Monofilament polypropylene fibres.
The preparation method of the gypsum based phase-change material anti-fire door core board, includes the following steps：
(1) foaming agent is diluted with water, extension rate is 25 times, by special-purpose air foaming mechanism it is standby go out foaming agent foam；
(2) by desulfurization gypsum powder, fiber, water-reducing agent, retarder is added to the water, stirs evenly；
(3) it is mixed into foaming agent foam in gypsum mixed slurry；
(4) glass bead aggregate, bentonite, phase-change material are added in foaming plaster slurry to be mixed evenly, obtain
Gypsum base phase transformation slurry；
(5) take with the matched mold of the gypsum based phase-change material anti-fire door core board shape, by above-mentioned gypsum base phase transformation starch
Material pours the bottom that thickness is 5mm in the mold；It is laid with grid cloth on the bottom；
(6) then, the slurry is poured for the second time to the thickness of 42mm；
(7) it is laid with grid cloth；
(8) then, the gypsum base phase transformation slurry, thickness 5mm are poured for the third time；
(9) it is set only under room temperature 7 days, obtains gypsum based phase-change material anti-fire door core board.
A kind of gypsum based phase-change material anti-fire door core board preparation method that aforementioned present invention provides mixes raw material components sequence
Material processing so that each component can be fully dispersed, and plays the synergistic effect between each component.Compared with prior art, this hair
The bright use avoided to magnesite material gets damp, returns to which the gypsum based phase-change material anti-fire door core board of the present invention not will produce
Halogen phenomenon；The storage that energy is carried out using phase-change material phase transformation is an environment-friendly energy-saving technology, and phase-change accumulation energy can be alleviated
Energy dissipation is reasonable energy utilization and mitigates the effective way of environmental pollution, and anti-fire door core board proposed by the present invention utilizes phase transformation
The storage and release that heat release carries out energy are inhaled in the phase transformation of material, are effectively increased thermal inertia, improve temperature fluctuation ability, simultaneously
So that anti-fire door core board has lower thermal coefficient, heat-insulating capability preferable.The present invention uses the bentonite with porous structure
As carrier adsorption phase-change material, the porous media phase-change material prepared using physisorphtion, preparation process is simple, need to only lead to
It crosses simple stirring fusion to incorporate phase-change material into porous media, so that it may to prepare graininess sizing phase-change material, make this
The anti-fire door core board phase transition performance stabilization and High anti bending strength of invention, have good environmental-protecting performance.Refractory temperature is up to 1000
Degree Celsius or more, combustibility is A1 grades, belongs to incombustible material, and fire safety performance is superior.
A kind of gypsum based phase-change material anti-fire door core board preparation method provided by the invention, foaming agent use so that foaming
Stablize, hole is uniform；It is added to reinforcing layer respectively in anti-fire door core board upper and lower surface, improve the intensity of anti-fire door core board and prevents
Fiery performance.The preparation method is simple for process, low for equipment requirements, reduces production cost, improves production efficiency.
Finished product anti-fire door core board in embodiment 3 learns after tested, density 418kg/m3, flexural strength 0.9Mpa, resistance to combustion
1000~1200 DEG C of temperature, fire endurance 2h.In addition, phase-change material, gypsum based phase-change material anti-fire door core board heat conduction system is added
Number reduces, and specific heat capacity increases, heat storage capacity enhancing, therefore, gypsum based phase-change material anti-fire door core board intensity of the embodiment of the present invention
Height, fire protecting performance is good, also has good heat-insulating capability.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations should all belong to the guarantor of appended claims of the present invention
Protect range.
Claims (7)
1. a kind of gypsum based phase-change material anti-fire door core board, which is characterized in that formed including following raw material, by weight：It is de-
Sulphur land plaster：50~70, glass bead aggregate：40~65, bentonite：8~45, water：90~150, retarder：0.2~0.8,
Water-reducing agent：0.5~2, foaming agent：0.5~1, fiber：0.2~1, phase-change material：10~40；
Wherein, the phase-change material, including following raw material composition, by weight：Lauric acid：40~60；Capric acid：40~60.
2. gypsum based phase-change material anti-fire door core board according to claim 1, which is characterized in that the water-reducing agent is naphthalene system
Water-reducing agent or poly carboxylic acid series water reducer.
3. gypsum based phase-change material anti-fire door core board according to claim 1, which is characterized in that the foaming agent is albumen
Type foaming agent or compound foaming agent.
4. gypsum based phase-change material anti-fire door core board according to claim 1, which is characterized in that including following raw material group
At by weight：Desulfurization gypsum powder：60, glass bead aggregate：50, bentonite：25, water：120, retarder：0.5, diminishing
Agent：1, foaming agent：0.7, fiber：0.5, phase-change material：30；
Wherein, the phase-change material, including following raw material composition, by weight：Lauric acid：50；Capric acid：50.
5. gypsum based phase-change material anti-fire door core board according to any one of claims 1 to 4, which is characterized in that the fiber
For polyester fiber or/and pencil Monofilament polypropylene fibres.
6. gypsum based phase-change material anti-fire door core board according to any one of claims 1 to 4, which is characterized in that the slow setting
Agent is protide calcium sulphate retarder.
7. a kind of preparation method of gypsum based phase-change material anti-fire door core board as described in claim 1~6 is any, feature exist
In：Include the following steps：
(1) foaming agent is diluted with water, extension rate is 20~25 times, by air foaming mechanism it is standby go out foaming agent foam；
(2) by desulfurization gypsum powder, fiber, water-reducing agent, retarder is added to the water, stirs evenly, and obtains gypsum mixed slurry；
(3) it is mixed into foaming agent foam in gypsum mixed slurry；
(4) glass bead aggregate, bentonite, phase-change material are added in foaming plaster slurry to be mixed evenly, obtain gypsum
Base phase transformation slurry；
(5) take with the matched mold of the gypsum based phase-change material anti-fire door core board shape, above-mentioned gypsum base phase transformation slurry is existed
The bottom that thickness is 4~5mm is poured in the mold；It is laid with grid cloth on the bottom；
(6) then, the gypsum base phase transformation slurry is poured for the second time to the thickness of 42~45mm；
(7) it is laid with grid cloth；
(8) then, the gypsum base phase transformation slurry is poured for the third time, and thickness is 4~5mm；
(9) 5~10 days are stood under room temperature, obtains gypsum based phase-change material anti-fire door core board.
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| CN201810423974.9A CN108640704A (en) | 2018-05-07 | 2018-05-07 | A kind of gypsum based phase-change material anti-fire door core board and preparation method thereof |
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| CN201810423974.9A CN108640704A (en) | 2018-05-07 | 2018-05-07 | A kind of gypsum based phase-change material anti-fire door core board and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110092629A (en) * | 2019-04-17 | 2019-08-06 | 广东科学技术职业学院 | A kind of phase transformation plasterboard for building |
| CN110950621A (en) * | 2019-12-16 | 2020-04-03 | 湖南昌迅科技环保股份有限公司 | Gypsum foamed door core board and preparation method thereof |
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| CN201730493U (en) * | 2010-05-07 | 2011-02-02 | 卢文成 | Core plate of inorganic foaming composite fire door with reinforced layer |
| CN102417340A (en) * | 2011-08-31 | 2012-04-18 | 南京工业大学 | Gypsum-based phase change energy storage polymer thermal insulation mortar and preparation method thereof |
| CN102850080A (en) * | 2012-08-20 | 2013-01-02 | 山东中远汇丽节能建材有限公司 | Phase-change energy-storage inorganic foam fireproof thermal-insulation board and preparation method thereof |
| CN103626458A (en) * | 2012-08-22 | 2014-03-12 | 北京建筑材料科学研究总院有限公司 | Preparation method for lightweight gypsum-based fireproof door core board |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201730493U (en) * | 2010-05-07 | 2011-02-02 | 卢文成 | Core plate of inorganic foaming composite fire door with reinforced layer |
| CN102417340A (en) * | 2011-08-31 | 2012-04-18 | 南京工业大学 | Gypsum-based phase change energy storage polymer thermal insulation mortar and preparation method thereof |
| CN102850080A (en) * | 2012-08-20 | 2013-01-02 | 山东中远汇丽节能建材有限公司 | Phase-change energy-storage inorganic foam fireproof thermal-insulation board and preparation method thereof |
| CN103626458A (en) * | 2012-08-22 | 2014-03-12 | 北京建筑材料科学研究总院有限公司 | Preparation method for lightweight gypsum-based fireproof door core board |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110092629A (en) * | 2019-04-17 | 2019-08-06 | 广东科学技术职业学院 | A kind of phase transformation plasterboard for building |
| CN110950621A (en) * | 2019-12-16 | 2020-04-03 | 湖南昌迅科技环保股份有限公司 | Gypsum foamed door core board and preparation method thereof |
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