CN102702808B - Infrared radiation coating capable of forming coating with low conductivity factor - Google Patents
Infrared radiation coating capable of forming coating with low conductivity factor Download PDFInfo
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Abstract
The invention discloses infrared radiation coating capable of forming coating with low heat conductivity factors. The infrared radiation coating is prepared by the following raw materials by weight percentage: 30-50% of spinel-silicate multiphase composite system infrared radiation powder materials, 3-15% of pore-creating agents, 0-20% of hexa-potassium titanate, 25-50% of sodium silicate, 5-15% of water, 1-10% of inorganic combination auxiliary, 0-2% of anti-settling agents, 0-3% of dispersing agents, 0-1% of defoaming agents and 0-1% of flatting agents. After the coating is dried and cured, the coatings of porous structures are formed in the using process, have excellent infrared radiation performance and low conductivity factors, can be firmly combined with a fireproof material base body, do not crack when used for a long time under the high temperature of 500-1300 DEG C, do not fall off, and are corrosion resisting and excellent in thermal shock resistance.
Description
Technical field
The present invention relates to ir radiation energy-saving material field, relate in particular to a kind of infrared radiation coating that can form low thermal conductivity coating.
Background technology
The application of ir radiation power-saving technology is a kind of effective way that improves the efficiency of energy utilization of Industrial Stoves.Infrared radiation coating is applied in to Industrial Stoves refractory material inner-wall surface, can effectively improve the ir radiation ability and the spectral response curve thereof that in stove, participate in radiative transfer body surface, strengthen the radiative transfer efficiency in stove, promote the carrying out of heat-processed, improve the homogeneity of kiln internal temperature, speed and the quality of quickening to workpiece heating, shorten the production cycle, improve the validity of energy utilization in Industrial Stoves use procedure, and there is the noxious gas emission of minimizing, reduce discharge flue-gas temperature, extend the good comprehensive benefits such as Industrial Stoves work-ing life.
In recent years, the infrared radiation coating of China has obtained very great development, and its energy-conserving action in Industrial Stoves comes into one's own day by day.Compare with kiln lining material, the infrared radiating coating of China often has higher thermal conductivity, and this will increase kiln inwall to the thermal conduction of kiln outer wall, increases the thermal dissipation of kiln, has lowered the validity of kiln to energy utilization.Existing low thermal conductivity material often infrared radiation property is not good, or high-temperature stability is bad.The thermal conductivity that composition design by infrared radiating coating and structure control reduce coating, be the effective way of improving the result of use of infrared radiation coating, fully improving the efficiency of energy utilization of kiln, the widespread use to infrared radiation coating in Industrial Stoves has great importance.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of infrared radiation coating that can form low thermal conductivity coating for above-mentioned prior art, improves the result of use of infrared radiation coating.
The present invention solves the problems of the technologies described above adopted technical scheme:
a kind of infrared radiation coating that can form low thermal conductivity coatingby following component, through mixed preparing, formed, described each component and component concentration thereof are by mass percentage: the heterogeneous compound system ir radiation of spinel-silicate powder: 30 ~ 50%, pore-forming material: 3 ~ 15%, six potassium titanates: 0 ~ 20%, water glass: 25 ~ 50%, water: 5 ~ 15%, inorganic combination auxiliary agent: 1 ~ 10%, anti-sedimentation agent: 0 ~ 2%, dispersion agent: 0 ~ 3%, defoamer: 0 ~ 1%, flow agent: 0 ~ 1%.
Press such scheme, the preparation method of the heterogeneous compound system ir radiation of described spinel-silicate powder is: include following steps: 1) various raw materials are prepared burden to scale, then this batching is carried out to ball milling, mixing, the preliminary treatment that dry and compression moulding is block base substrate; Described raw material comprises the A component of tangible one-tenth spinel type sosoloid, B component and the accelerant C component of formation silicate minerals, and its mass ratio is 100%:20 ~ 300%:0 ~ 15%, and wherein, described A component includes Fe
2o
3, MnO
2, CuO, Co
2o
3, Mo
2o
3, NiO, V
2o
5and WO
3, described B component includes Al
2o
3, SiO
2, MgO, BaO, CaO and TiO
2, described accelerant C component includes glass powder and B
2o
3, each component concentration is by percentage to the quality: Fe
2o
3: 0 ~ 60%, MnO
2: 0 ~ 60%, Al
2o
3: 5 ~ 50%, SiO
2: 5 ~ 50%, CuO:0 ~ 12%, Co
2o
3: 0 ~ 10%, MgO:0 ~ 10%, Mo
2o
3: 0 ~ 6%, NiO:0 ~ 6%, TiO
2: 0 ~ 6%, V
2o
5: 0 ~ 5%, WO
3: 0 ~ 5%, BaO:0 ~ 3%, CaO:0 ~ 3%, glass powder: 0 ~ 3%, B
2o
3: 0 ~ 3%; 2) the block base substrate of step 1) gained is carried out to heating and thermal insulation in 800 ~ 980 ℃ of temperature ranges, the heating and thermal insulation time is 1 ~ 6 hour, forms spinel type sosoloid; Then continue to be warmed up in 1100 ~ 1300 ℃ of temperature ranges and carry out heating and thermal insulation, be incubated 2 ~ 8 hours, form silicate minerals, spinel type sosoloid and silicate minerals are carried out heterogeneous compound, form the black sintered compact of heterogeneous composite structure; 3) by step 2) gained black sintered compact is through fragmentation, pulverizing and cross 200 ~ 500 sieves, obtains the heterogeneous compound system ir radiation of spinel-silicate powder.
Press such scheme, described inorganic combination auxiliary agent is formed through mixed preparing by following component: Al
2o
3: 20 ~ 40%, SiO
2: 20 ~ 60%, MgO:2 ~ 10%, TiO
2: 2 ~ 10%, NiO:0 ~ 10%, Cr
2o
3: 0 ~ 10%, B
2o
5: 0 ~ 10%, be more than mass percent meter.
Press such scheme, described pore-forming material is comprised of graphite and starch, and the mass ratio of graphite and starch is 50%:50%.
Press such scheme, described anti-sedimentation agent is organobentonite; Described dispersion agent is sodium phosphate; Described defoamer is tributyl phosphate; Described flow agent is water-borne acrylic resin.
The present invention, when being mixed with, weighs above-mentioned each component by proportioning, be uniformly mixed 1 ~ 6 hour, makes the infrared radiation coating of thick suspension.
The reaction mechanism of infrared radiation coating of the present invention is: by forming silicon sol and inorganic combination auxiliary agent after water glass dry solidification, at high temperature form the associativity power that liquid phase increases infrared radiating coating, in heating use procedure, pore-forming material forms the thermal conductivity that vesicular structure reduces coating in coating, adds six potassium titanates of low thermal conductivity further to reduce the thermal conductivity of coating simultaneously.
While using, directly, at matrix surface spary infrared radiation coating of the present invention, form infrared radiating coating after dry solidification in refractory material matrix, can under 500 ~ 1300 ℃ of high temperature, not ftracture by life-time service, do not come off, corrosion-resistant, thermal shock resistance is good.
Compared with prior art, the feature that infrared radiation coating of the present invention has is:
1) in coating, add pore-forming material, make coating form vesicular structure in heating use procedure, lower the thermal conductivity of coating, strengthen the effect of heat insulation of coating, six potassium titanates that simultaneously add low thermal conductivity, further reduce the thermal conductivity of coating and the effect of heat insulation of raising coating;
2) in coating, add inorganic combination auxiliary agent, at this auxiliary agent of heating use procedure, in coating, form high-temperature liquid-phase, play the effect of sealed porosity, form separated unicellular structure, be conducive to reduce thermal conductivity, and can promote the combination of coating and matrix, and prevent coating structure cracking or come off, improve the anti-thermal shock impact capacity of coating;
3) adopt the heterogeneous compound system powder of previously prepared spinel-silicate as the infrared radiant material in coating, this compound system powder has excellent infrared radiation property, make the coating of vesicular structure keep high infrared radiation property, guarantee the energy-saving effect of coating.
The formed coating of infrared radiation coating of the present invention has good infrared radiation property and low thermal conductivity concurrently; and can with refractory material matrix mortise; at high temperature structure and performance; corrosion-resistant; thermal shock resistance is good, can, for the Industrial Stoves inner lining material surface of the industries such as building materials, metallurgy, thermoelectricity, petrochemical industry, chemical industry, light industry, improve the efficiency of energy utilization of Industrial Stoves; the inner lining material of protection kiln, the work-ing life of prolongation inner lining of kiln material.
Accompanying drawing explanation
Fig. 1 is that embodiment 1 is through the XRD figure spectrum of 1200 ℃ of thermal treatment infrared radiating coatings;
Fig. 2 is that embodiment 1 is through the SEM of 1200 ℃ of thermal treatment infrared radiating coatings photo.
Embodiment
Below in conjunction with embodiment, the invention will be further described, but this explanation can not be construed as limiting the invention.
embodiment 1
Be the formula of the heterogeneous compound system ir radiation of spinel-silicate powder 40%, pore-forming material 5%, six potassium titanates 10%, water glass 30%, water 5%, inorganic combination auxiliary agent 6.7%, organobentonite 1%, sodium phosphate 2%, tributyl phosphate 0.2%, water-borne acrylic resin 0.1% by mass percentage, described pore-forming material is comprised of graphite and starch, the mass ratio of graphite and starch is 50%:50%, take above-mentioned each component, be uniformly mixed 4 hours, make the infrared radiation coating of thick suspension.
Wherein, include and form the A component of spinel type sosoloid, B component and the accelerant C component of formation silicate minerals in the heterogeneous compound system ir radiation of spinel-silicate powder, wherein, described A component includes Fe
2o
3, MnO
2, CuO and Mo
2o
3, described B component includes Al
2o
3, SiO
2, MgO and TiO
2, described accelerant C component includes B
2o
3, each component concentration is by percentage to the quality: 10%Fe
2o
3, 16%MnO
2, 8%CuO, 1%Mo
2o
3, 50%Al
2o
3, 12%SiO
2, 1.5%MgO, 0.5%TiO
2and 1%BaO; Its preparation technology is: various raw materials are prepared burden to scale, to this batching carry out ball milling, mixing, dry and compression moulding is block base substrate; Burning till in preparation process of block base substrate, first be heated to 950 ℃ of insulations 2 hours, form spinel type sosoloid, then continue to be warmed up to 1200 ℃ of insulations 8 hours, spinel type sosoloid and silicate minerals are carried out heterogeneous compound, form the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 200 mesh sieves, prepare the heterogeneous compound system ir radiation of spinel-silicate powder;
Wherein, in inorganic combination auxiliary agent, the mass ratio of each component is: 20%Al
2o
3, 60%SiO
2, 5%MgO, 2%TiO
2, 5%NiO, 5%Cr
2o
3and 3%B
2o
5, through mixed preparing, form.
After refractory material matrix surface is purged, at the above-mentioned infrared radiation coating of surperficial spary, after dry solidification, form infrared radiating coating.The normal direction all wave band radiant ratio of infrared radiating coating is that the radiant ratio of 0.92,8 μ m ~ 25 mu m waveband is that the radiant ratio of 0.91,8 μ m ~ 14 mu m waveband is that the radiant ratio of 0.93,14 μ m ~ 25 mu m waveband is 0.93.The thermal conductivity of infrared radiating coating at 1000 ℃ is 0.26W/ (mK).Infrared radiating coating carries out the cooling thermal shock circulation of air natural within the scope of normal temperature ~ 1200 ℃, the coatingsurface flawless that circulates 30 times, and coating does not come off.
The bright infrared radiating coating of XRD figure stave of Fig. 1 mainly contains transition metal oxide spinel type sosoloid and mullite, in addition, also contains a small amount of magnesium-aluminium spinel, and coating intermediate infrared radiation ceramic composition has good high-temperature stability.Fig. 1 shows: infrared radiation ceramic coating has uniform vesicular structure after Overheating Treatment, and this vesicular structure is conducive to reduce the thermal conductivity of coating.
embodiment 2
Be the formula of the heterogeneous compound system ir radiation of 30% spinel-silicate powder, 3% pore-forming material, 20% 6 potassium titanate, 25% water glass, 10% water, 8% inorganic combination auxiliary agent, 2% organobentonite, 1% sodium phosphate, 0.5% tributyl phosphate, 0.5% water-borne acrylic resin in mass ratio, above-mentioned various components are weighed by proportioning, described pore-forming material is comprised of graphite and starch, the mass ratio of graphite and starch is 50%:50%, be uniformly mixed 1 hour, make the infrared radiation coating of thick suspension.
Wherein, in the heterogeneous compound system ir radiation of spinel-silicate powder, the mass ratio of each component is: 28%MnO
2, 12%CuO, 6%Mo
2o
3, 5%V
2o
5, 5%WO
3, 5%Al
2o
3, 20%SiO
2, 10%MgO, 6%TiO
2and 3%CaO; Its preparation technology is: various raw materials are prepared burden to scale, to this batching carry out ball milling, mixing, dry and compression moulding is block base substrate; Burning till in preparation process of block base substrate, first be heated to 950 ℃ of insulations 4 hours, form spinel type sosoloid, then continue to be warmed up to 1300 ℃ of insulations 2 hours, spinel type sosoloid and silicate minerals are carried out heterogeneous compound, form the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 250 mesh sieves, prepare the heterogeneous compound system ir radiation of spinel-silicate powder;
In inorganic combination auxiliary agent, the mass ratio of each component is: 40%Al
2o
3, 36%SiO
2, 2%MgO, 6%TiO
2, 6%NiO and 10%Cr
2o
3, through mixed preparing, form.
After refractory material matrix surface is purged, at the above-mentioned infrared radiation coating of surperficial spary, after dry solidification, form infrared radiating coating.The normal direction all wave band radiant ratio of infrared radiating coating is that the radiant ratio of 0.89,8 μ m ~ 25 mu m waveband is that the radiant ratio of 0.91,8 μ m ~ 14 mu m waveband is that the radiant ratio of 0.92,14 μ m ~ 25 mu m waveband is 0.93.The thermal conductivity of infrared radiating coating at 1000 ℃ is 0.31W/ (mK).Infrared radiating coating carries out the cooling thermal shock circulation of air natural within the scope of normal temperature ~ 1200 ℃, the coatingsurface flawless that circulates 30 times, and coating does not come off.
embodiment 3
Be the formula of the heterogeneous compound system ir radiation of 50% spinel-silicate powder, 3% pore-forming material, 33% water glass, 10% water, 1% inorganic combination auxiliary agent, 1% organobentonite, 1% tributyl phosphate, 1% water-borne acrylic resin in mass ratio, above-mentioned various components are weighed by proportioning, be uniformly mixed 3 hours, make the infrared radiation coating of thick suspension.
Wherein, in the heterogeneous compound system ir radiation of spinel-silicate powder, the mass ratio of each component is: 10%Fe
2o
3, 60%MnO
2, 3%CuO, 4%Co
2o
3, 3%NiO, 2%WO
3, 8%Al
2o
3, 5%SiO
2, 3% BaO and 2%CaO; Its preparation technology is: various raw materials are prepared burden to scale, to this batching carry out ball milling, mixing, dry and compression moulding is block base substrate; Burning till in preparation process of block base substrate, first be heated to 800 ℃ of insulations 6 hours, form spinel type sosoloid, then continue to be warmed up to 1250 ℃ of insulations 6 hours, spinel type sosoloid and silicate minerals are carried out heterogeneous compound, form the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 450 mesh sieves, prepare heterogeneous compound system ir radiation powder.
In inorganic combination auxiliary agent, each mass ratio forming is: 30%Al
2o
3, 38%SiO
2, 10%MgO, 10%TiO
2, 2%NiO and 10%B
2o
5, through mixed preparing, form.
After refractory material matrix surface is purged, at the above-mentioned infrared radiation coating of surperficial spary, after dry solidification, form infrared radiating coating.The normal direction all wave band radiant ratio of infrared radiating coating is that the radiant ratio of 0.89,8 μ m ~ 25 mu m waveband is that the radiant ratio of 0.90,8 μ m ~ 14 mu m waveband is that the radiant ratio of 0.93,14 μ m ~ 25 mu m waveband is 0.94.The thermal conductivity of infrared radiating coating at 1000 ℃ is 0.30W/ (mK).Infrared radiating coating carries out the cooling thermal shock circulation of air natural within the scope of normal temperature ~ 1200 ℃, the coatingsurface flawless that circulates 30 times, and coating does not come off.
embodiment 4
Be the formula of the heterogeneous compound system ir radiation of 35% spinel-silicate powder, 15% pore-forming material, 29% water glass, 15% water, 3% inorganic combination auxiliary agent, 3% sodium phosphate in mass ratio, above-mentioned various components are weighed by proportioning, be uniformly mixed 5 hours, make the infrared radiation coating of thick suspension.
Wherein, in the heterogeneous compound system ir radiation of spinel-silicate powder, the mass ratio of each component is:
60%Fe
2o
3, 10%Co
2o
3, 6%NiO, 2%V
2o
5, 13%Al
2o
3, 7%SiO
2, 1.5%TiO
2and 0.5%CaO; Its preparation technology is: various raw materials are prepared burden to scale, to this batching carry out ball milling, mixing, dry and compression moulding is block base substrate; Burning till in preparation process of block base substrate, first be heated to 980 ℃ of insulations 1 hour, form spinel type sosoloid, then continue to be warmed up to 1100 ℃ of insulations 8 hours, spinel type sosoloid and silicate minerals are carried out heterogeneous compound, form the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 230 mesh sieves, prepare heterogeneous compound system ir radiation powder.
In inorganic combination auxiliary agent, each mass ratio forming is: 30%Al
2o
3, 40%SiO
2, 7%MgO, 3%TiO
2, 10%NiO, 5%Cr
2o
3with 5% B
2o
5, through mixed preparing, form.
After refractory material matrix surface is purged, at the above-mentioned infrared radiation coating of surperficial spary, after dry solidification, form infrared radiating coating.The normal direction all wave band radiant ratio of infrared radiating coating is that the radiant ratio of 0.90,8 μ m ~ 25 mu m waveband is that the radiant ratio of 0.92,8 μ m ~ 14 mu m waveband is that the radiant ratio of 0.93,14 μ m ~ 25 mu m waveband is 0.93.The thermal conductivity of infrared radiating coating at 1000 ℃ is 0.27W/ (mK).Infrared radiating coating carries out the cooling thermal shock circulation of air natural within the scope of normal temperature ~ 1200 ℃, the coatingsurface flawless that circulates 30 times, and coating does not come off.
embodiment 5
Be the formula of the heterogeneous compound system ir radiation of 30% spinel-silicate powder, 5% pore-forming material, 5% 6 potassium titanate, 50% water glass, 5% water, 3.5% inorganic combination auxiliary agent, 0.5% organobentonite, 0.5% sodium phosphate, 0.3% tributyl phosphate, 0.2% water-borne acrylic resin in mass ratio, above-mentioned various components are weighed by proportioning, be uniformly mixed 2 hours, make the infrared radiation coating of thick suspension.
Wherein, in the heterogeneous compound system ir radiation of spinel-silicate powder, the mass ratio of each component is: 30%Fe
2o
3, 10%MnO
2, 3%CuO, 2%Co
2o
3, 3%Mo
2o
3, 2.5%V
2o
5, 2.5%WO
3, 25%Al
2o
3, 10%SiO
2, 5%MgO, 3%TiO
2, 1.5%BaO and 1.5%CaO; Its preparation technology is: various raw materials are prepared burden to scale, to this batching carry out ball milling, mixing, dry and compression moulding is block base substrate; Burning till in preparation process of block base substrate, first be heated to 850 ℃ of insulations 4 hours, form spinel type sosoloid, then continue to be warmed up to 1100 ℃ of insulations 8 hours, spinel type sosoloid and silicate minerals are carried out heterogeneous compound, form the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 300 mesh sieves, prepare heterogeneous compound system ir radiation powder.
In inorganic combination auxiliary agent, the mass ratio of each component is: 40%Al
2o
3, 40%SiO
2, 6%MgO, 6%TiO
2and 8%Cr
2o
3, through mixed preparing, form.
After refractory material matrix surface is purged, at the above-mentioned infrared radiation coating of surperficial spary, after dry solidification, form infrared radiating coating.The normal direction all wave band radiant ratio of infrared radiating coating is that the radiant ratio of 0.88,8 μ m ~ 25 mu m waveband is that the radiant ratio of 0.90,8 μ m ~ 14 mu m waveband is that the radiant ratio of 0.92,14 μ m ~ 25 mu m waveband is 0.91.The thermal conductivity of infrared radiating coating at 1000 ℃ is 0.28W/ (mK).Infrared radiating coating carries out the cooling thermal shock circulation of air natural within the scope of normal temperature ~ 1200 ℃, the coatingsurface flawless that circulates 30 times, and coating does not come off.
embodiment 6
Be the formula of the heterogeneous compound system ir radiation of 35% spinel-silicate powder, 7% pore-forming material, 10% 6 potassium titanate, 30% water glass, 10% water, 7% inorganic combination auxiliary agent, 0.3% organobentonite, 0.3% sodium phosphate, 0.2% tributyl phosphate, 0.2% water-borne acrylic resin in mass ratio, above-mentioned various components are weighed by proportioning, be uniformly mixed 2 hours, make the infrared radiation coating of thick suspension.
Wherein, in the heterogeneous compound system ir radiation of spinel-silicate powder, the mass ratio of each component is: 7%Fe
2o
3, 20%MnO
2, 6%Co
2o
3, 5.6%Mo
2o
3, 1.4%NiO, 6%Al
2o
3, 50%SiO
2, 1.5%MgO, 0.5%TiO
2and 2%BaO; Its preparation technology is: various raw materials are prepared burden to scale, to this batching carry out ball milling, mixing, dry and compression moulding is block base substrate; Burning till in preparation process of block base substrate, first be heated to 900 ℃ of insulations 6 hours, form spinel type sosoloid, then continue to be warmed up to 1150 ℃ of insulations 6 hours, spinel type sosoloid and silicate minerals are carried out heterogeneous compound, form the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 200 mesh sieves, prepare heterogeneous compound system ir radiation powder.
In inorganic combination auxiliary agent, each mass ratio forming is: 30%Al
2o
3, 50%SiO
2, 8%MgO, 2%TiO
2, 2%NiO, 3%Cr
2o
3with 5% B
2o
5, through mixed preparing, form.
After refractory material matrix surface is purged, at the above-mentioned infrared radiation coating of surperficial spary, after dry solidification, form infrared radiating coating.The normal direction all wave band radiant ratio of infrared radiating coating is that the radiant ratio of 0.89,8 μ m ~ 25 mu m waveband is that the radiant ratio of 0.91,8 μ m ~ 14 mu m waveband is that the radiant ratio of 0.92,14 μ m ~ 25 mu m waveband is 0.93.The thermal conductivity of infrared radiating coating at 1000 ℃ is 0.25W/ (mK).Infrared radiating coating carries out the cooling thermal shock circulation of air natural within the scope of normal temperature ~ 1200 ℃, the coatingsurface flawless that circulates 30 times, and coating does not come off.
embodiment 7
Be the formula of the heterogeneous compound system ir radiation of 45% spinel-silicate powder, 10% pore-forming material, 30% water glass, 9% water, 4.5% inorganic combination auxiliary agent, 1.2% organobentonite, 0.1% sodium phosphate, 0.1% tributyl phosphate, 0.1% water-borne acrylic resin in mass ratio, above-mentioned various components are weighed by proportioning, be uniformly mixed 6 hours, make the infrared radiation coating of thick suspension.
Wherein, in the heterogeneous compound system ir radiation of spinel-silicate powder, the mass ratio of each component is: 30%MnO
2, 8.5%CuO, 8%Co
2o
3, 6.4%Mo
2o
3, 1.6%NiO, 22.5%Al
2o
3, 22.5%SiO
2and 0.5%MgO; Its preparation technology is: various raw materials are prepared burden to scale, to this batching carry out ball milling, mixing, dry and compression moulding is block base substrate; Burning till in preparation process of block base substrate, first be heated to 900 ℃ of insulations 3 hours, form spinel type sosoloid, then continue to be warmed up to 1300 ℃ of insulations 4 hours, spinel type sosoloid and silicate minerals are carried out heterogeneous compound, form the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 325 mesh sieves, prepare heterogeneous compound system ir radiation powder.
In inorganic combination auxiliary agent, each mass ratio forming is: 20%Al
2o
3, 60%SiO
2, 3%MgO, 7%TiO
2, 4%NiO and 6%Cr
2o
3, through mixed preparing, form.
After refractory material matrix surface is purged, at the above-mentioned infrared radiation coating of surperficial spary, after dry solidification, form infrared radiating coating.The normal direction all wave band radiant ratio of infrared radiating coating is that the radiant ratio of 0.88,8 μ m ~ 25 mu m waveband is that the radiant ratio of 0.90,8 μ m ~ 14 mu m waveband is that the radiant ratio of 0.91,14 μ m ~ 25 mu m waveband is 0.93.The thermal conductivity of infrared radiating coating at 1000 ℃ is 0.27W/ (mK).Infrared radiating coating carries out the cooling thermal shock circulation of air natural within the scope of normal temperature ~ 1200 ℃, the coatingsurface flawless that circulates 30 times, and coating does not come off.
embodiment 8
Be the formula of the heterogeneous compound system ir radiation of 30% spinel-silicate powder, 5% pore-forming material, 15% 6 potassium titanate, 33% water glass, 7% water, 6% inorganic combination auxiliary agent, 2% organobentonite, 1.4% sodium phosphate, 0.3% tributyl phosphate, 0.3% water-borne acrylic resin in mass ratio, above-mentioned various components are weighed by proportioning, be uniformly mixed 4 hours, make the infrared radiation coating of thick suspension.
Wherein, in the heterogeneous compound system ir radiation of spinel-silicate powder, the mass ratio of each component is: 47%Fe
2o
3, 25.2%MnO
2, 7.2%CuO, 5%V
2o
5, 3.6%WO
3, 6%Al
2o
3, 5%SiO
2and 1%CaO; Its preparation technology is: various raw materials are prepared burden to scale, to this batching carry out ball milling, mixing, dry and compression moulding is block base substrate; Burning till in preparation process of block base substrate, first be heated to 850 ℃ of insulations 6 hours, form spinel type sosoloid, then continue to be warmed up to 1300 ℃ of insulations 3 hours, spinel type sosoloid and silicate minerals are carried out heterogeneous compound, form the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 400 mesh sieves, prepare heterogeneous compound system ir radiation powder.
In inorganic combination auxiliary agent, each mass ratio forming is: 35%Al
2o
3, 45%SiO
2, 5%MgO, 8%TiO
2, 4%Cr
2o
3and 3%B
2o
5, through mixed preparing, form.
After refractory material matrix surface is purged, at the above-mentioned infrared radiation coating of surperficial spary, after dry solidification, form infrared radiating coating.The normal direction all wave band radiant ratio of infrared radiating coating is that the radiant ratio of 0.90,8 μ m ~ 25 mu m waveband is that the radiant ratio of 0.93,8 μ m ~ 14 mu m waveband is that the radiant ratio of 0.94,14 μ m ~ 25 mu m waveband is 0.94.The thermal conductivity of infrared radiating coating at 1000 ℃ is 0.29W/ (mK).Infrared radiating coating carries out the cooling thermal shock circulation of air natural within the scope of normal temperature ~ 1200 ℃, the coatingsurface flawless that circulates 30 times, and coating does not come off.
Through ir radiation test proof, the infrared radiating coating that the present invention forms has good infrared radiation property, lower thermal conductivity and structural stability preferably, its normal direction all wave band radiant ratio is 0.88 ~ 0.92, the radiant ratio of 8 μ m ~ 25 mu m wavebands is 0.90 ~ 0.93, the radiant ratio of 8 μ m ~ 14 mu m wavebands is that the radiant ratio of 0.91 ~ 0.94,14 μ m ~ 25 mu m wavebands is 0.91 ~ 0.94; The thermal conductivity of infrared radiating coating at 1000 ℃ is 0.25 ~ 0.31W/ (mK).Within the scope of normal temperature ~ 1200 ℃, carry out the cooling thermal shock circulation of air natural, the coatingsurface flawless that circulates 30 times, coating does not come off.
The foregoing is only embodiments of the invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. can form the infrared radiation coating of low thermal conductivity coating, by following component, through mixed preparing, formed, described each component and component concentration thereof are by mass percentage: the heterogeneous compound system ir radiation of spinel-silicate powder: 40%, pore-forming material: 5%, six potassium titanates: 10%, water glass: 30%, water: 5%, inorganic combination auxiliary agent: 6.7%, anti-sedimentation agent: 1%, dispersion agent: 2%, defoamer: 0.2%, flow agent: 0.1%, described pore-forming material is comprised of graphite and starch, the mass ratio of graphite and starch is 50%:50%, the preparation method of the heterogeneous compound system ir radiation of described spinel-silicate powder is: include following steps: 1) various raw materials are prepared burden to scale, again this batching is carried out to ball milling, mix, the preliminary treatment dry and compression moulding is block base substrate, described raw material comprises the A component of tangible one-tenth spinel type sosoloid, B component and the accelerant C component of formation silicate minerals, and its mass ratio is 100%:20 ~ 300%:0 ~ 15%, and wherein, described A component is Fe
2o
3, MnO
2, CuO, Co
2o
3, Mo
2o
3, NiO, V
2o
5and WO
3, described B component is Al
2o
3, SiO
2, MgO, BaO, CaO and TiO
2, described accelerant C component is glass powder and B
2o
3, each component concentration is by percentage to the quality: Fe
2o
3: 0 ~ 60%, MnO
2: 0 ~ 60%, Al
2o
3: 5 ~ 50%, SiO
2: 5 ~ 50%, CuO:0 ~ 12%, Co
2o
3: 0 ~ 10%, MgO:0 ~ 10%, Mo
2o
3: 0 ~ 6%, NiO:0 ~ 6%, TiO
2: 0 ~ 6%, V
2o
5: 0 ~ 5%, WO
3: 0 ~ 5%, BaO:0 ~ 3%, CaO:0 ~ 3%, glass powder: 0 ~ 3%, B
2o
3: 0 ~ 3%, 2) the block base substrate of step 1) gained is carried out to heating and thermal insulation in 800 ~ 980 ℃ of temperature ranges, the heating and thermal insulation time is 1 ~ 6 hour, forms spinel type sosoloid, then continue to be warmed up in 1100 ~ 1300 ℃ of temperature ranges and carry out heating and thermal insulation, be incubated 2 ~ 8 hours, form silicate minerals, spinel type sosoloid and silicate minerals are carried out heterogeneous compound, form the black sintered compact of heterogeneous composite structure, 3) by step 2) gained black sintered compact is through fragmentation, pulverizing and cross 200 ~ 500 sieves, obtains the heterogeneous compound system ir radiation of spinel-silicate powder, and described inorganic combination auxiliary agent is formed through mixed preparing by following component: Al
2o
3: 20 ~ 40%, SiO
2: 20 ~ 60%, MgO:2 ~ 10%, TiO
2: 2 ~ 10%, NiO:0 ~ 10%, Cr
2o
3: 0 ~ 10%, B
2o
5: 0 ~ 10%, be more than mass percent meter.
2. by the infrared radiation coating that can form low thermal conductivity coating claimed in claim 1, it is characterized in that described inorganic combination adjuvant component is preferably: Al
2o
3: 20%, SiO
2: 60%, MgO:5%, TiO
2: 2%, NiO:5%, Cr
2o
3: 5%, B
2o
5: 3%, be more than mass percent meter.
3. by the infrared radiation coating that can form low thermal conductivity coating claimed in claim 1, it is characterized in that described anti-sedimentation agent is organobentonite; Described dispersion agent is sodium phosphate; Described defoamer is tributyl phosphate; Described flow agent is water-borne acrylic resin.
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|---|---|---|---|
| CN201210147292.2A CN102702808B (en) | 2012-05-14 | 2012-05-14 | Infrared radiation coating capable of forming coating with low conductivity factor |
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| CN102702808B true CN102702808B (en) | 2014-08-13 |
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