CN102702808A - 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 the 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 Industrial Stoves refractory material inner-wall surface; Can effectively improve the ir radiation ability and the spectral response curve thereof of participating in the radiative transfer body surface in the stove; Strengthen the radiative transfer efficient in the stove, promote the carrying out of heat-processed, improve the homogeneity of kiln internal temperature; Quickening is to the speed and the quality of workpiece heating; Shorten the production cycle, improve the validity of energy utilization in the Industrial Stoves use, and have the noxious gas emission of minimizing, reduce the discharging flue-gas temperature, prolong good comprehensive benefit 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 the kiln lining material, the infrared radiating coating of China often has higher thermal conductivity, and this will increase the thermal conduction of kiln inwall to the 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, and perhaps high-temperature stability is bad.The thermal conductivity that composition design through infrared radiating coating and structure control reduce coating; Be to improve the result of use of infrared radiation coating, fully improve the effective way of the efficiency of energy utilization of kiln, the widespread use in Industrial Stoves has great importance to infrared radiation coating.
Summary of the invention
Technical problem to be solved by this invention is to above-mentioned prior art a kind of infrared radiation coating that can form the low thermal conductivity coating to be provided, and improves the result of use of infrared radiation coating.
The present invention solves the problems of the technologies described above the technical scheme that is adopted:
A kind of infrared radiation coating that can form the low thermal conductivity coatingFormed through mixed preparing by following component, said 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%, skimmer: 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, again this batching is carried out the rough handling that ball milling, mixing, drying and compression moulding are block base substrate; Described raw material comprises the A component of tangible one-tenth spinel type sosoloid, the 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 heat tracing in 800 ~ 980 ℃ of TRs, the heat tracing time is 1 ~ 6 hour, forms spinel type sosoloid; Continue then to be warmed up in 1100 ~ 1300 ℃ of TRs and carry out heat tracing, be incubated 2 ~ 8 hours, form silicate minerals, it is heterogeneous compound that spinel type sosoloid and silicate minerals are carried out, and forms the black sintered compact of heterogeneous composite structure; 3) with 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%, more than be the mass percent meter.
Press such scheme, described pore-forming material is made up of graphite and starch, and the mass ratio of graphite and starch is 50%:50%.
Press such scheme, described anti-sedimentation agent is an organobentonite; Described dispersion agent is a sodium phosphate; Described skimmer is a tributyl phosphate; Described flow agent is a water-borne acrylic resin.
The present invention weighs above-mentioned each component when being mixed with by proportioning, mixed 1 ~ 6 hour, promptly makes the infrared radiation coating of thick suspension.
The reaction mechanism of infrared radiation coating of the present invention is: through forming the associativity power that silicon sol and inorganic combination auxiliary agent at high temperature form liquid phase increase infrared radiating coating behind the water glass dry solidification; Pore-forming material forms the thermal conductivity that vesicular structure reduces coating in coating in the heating use, and six potassium titanates that add low thermal conductivity simultaneously further reduce the thermal conductivity of coating.
When on refractory material matrix, using, directly at matrix surface spary infrared radiation coating of the present invention, form infrared radiating coating behind the dry solidification, 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 characteristics that have of infrared radiation coating of the present invention are:
1) in coating, adds pore-forming material; Make coating in the heating use, form vesicular structure, lower the thermal conductivity of coating, the effect of heat insulation of enhancement coating; Six potassium titanates that add low thermal conductivity simultaneously further reduce the thermal conductivity of coating and the effect of heat insulation of raising coating;
2) in coating, add inorganic combination auxiliary agent; In coating, form high-temperature liquid-phase at this auxiliary agent of heating use, play the effect of sealed porosity, form and separate unicellular structure; Help reducing thermal conductivity; And can promote combining of coating and matrix, and prevent the coating structure cracking or come off, improve the anti-thermal shock impact capacity of coating;
3) the heterogeneous compound system powder of spinel-silicate that adopts preparation in advance is as the infrared radiant material in the 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 be used for the Industrial Stoves inner lining material surface of industries such as building materials, metallurgy, thermoelectricity, petrochemical industry, chemical industry, light industry, improves 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.
Description of drawings
Fig. 1 is the XRD figure spectrum of embodiment 1 through 1200 ℃ of thermal treatment infrared radiating coatings;
Fig. 2 is the SEM photo of embodiment 1 through 1200 ℃ of thermal treatment infrared radiating coatings.
Embodiment
Below in conjunction with embodiment the present invention is described further, but this explanation can not be construed as limiting the invention.
Embodiment 1
Be the prescription 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 made up of graphite and starch; The mass ratio of graphite and starch is 50%:50%; Take by weighing above-mentioned each component; Mixed 4 hours, and promptly made the infrared radiation coating of thick suspension.
Wherein, include the A component that forms spinel type sosoloid, B component and the accelerant C component that forms silicate minerals in the heterogeneous compound system ir radiation of the 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, and it is block base substrate that this batching is carried out ball milling, mixing, drying and compression moulding; Burning till in the preparation process of block base substrate; Be heated to 950 ℃ of insulations 2 hours earlier, form spinel type sosoloid, continue to be warmed up to 1200 ℃ of insulations 8 hours then; It is heterogeneous compound that spinel type sosoloid and silicate minerals are carried out, and forms the black sintered compact of heterogeneous composite structure; Through broken, pulverize and cross 200 mesh sieves, the heterogeneous compound system ir radiation of preparation spinel-silicate powder;
Wherein, the mass ratio of each component is in the inorganic combination auxiliary agent: 20%Al
2O
3, 60%SiO
2, 5%MgO, 2%TiO
2, 5%NiO, 5%Cr
2O
3And 3%B
2O
5, form through mixed preparing.
After the refractory material matrix surface purged,, form infrared radiating coating behind the dry solidification at the above-mentioned infrared radiation coating of surperficial spary.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 wavebands is that the radiant ratio of 0.91,8 μ m ~ 14 mu m wavebands is that the radiant ratio of 0.93,14 μ m ~ 25 mu m wavebands is 0.93.The thermal conductivity of infrared radiating coating under 1000 ℃ is 0.26W/ (mK).Infrared radiating coating carries out air naturally cooling thermal shock circulation in ℃ 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 spot 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 bakingout process, this vesicular structure helps reducing the thermal conductivity of coating.
Embodiment 2
By mass ratio is the prescription 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; Above-mentioned various components are weighed by proportioning; Described pore-forming material is made up of graphite and starch; The mass ratio of graphite and starch is 50%:50%; Mixed 1 hour, and promptly made the infrared radiation coating of thick suspension.
Wherein, the mass ratio of each component is in the heterogeneous compound system ir radiation of the spinel-silicate powder: 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, and it is block base substrate that this batching is carried out ball milling, mixing, drying and compression moulding; Burning till in the preparation process of block base substrate; Be heated to 950 ℃ of insulations 4 hours earlier, form spinel type sosoloid, continue to be warmed up to 1300 ℃ of insulations 2 hours then; It is heterogeneous compound that spinel type sosoloid and silicate minerals are carried out, and forms the black sintered compact of heterogeneous composite structure; Through broken, pulverize and cross 250 mesh sieves, the heterogeneous compound system ir radiation of preparation spinel-silicate powder;
The mass ratio of each component is in the inorganic combination auxiliary agent: 40%Al
2O
3, 36%SiO
2, 2%MgO, 6%TiO
2, 6%NiO and 10%Cr
2O
3, form through mixed preparing.
After the refractory material matrix surface purged,, form infrared radiating coating behind the dry solidification at the above-mentioned infrared radiation coating of surperficial spary.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 wavebands is that the radiant ratio of 0.91,8 μ m ~ 14 mu m wavebands is that the radiant ratio of 0.92,14 μ m ~ 25 mu m wavebands is 0.93.The thermal conductivity of infrared radiating coating under 1000 ℃ is 0.31W/ (mK).Infrared radiating coating carries out air naturally cooling thermal shock circulation in ℃ scope of normal temperature ~ 1200, the coatingsurface flawless that circulates 30 times, and coating does not come off.
Embodiment 3
By mass ratio is the prescription 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; Above-mentioned various components are weighed by proportioning; Mixed 3 hours, and promptly made the infrared radiation coating of thick suspension.
Wherein, the mass ratio of each component is in the heterogeneous compound system ir radiation of the spinel-silicate powder: 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, and it is block base substrate that this batching is carried out ball milling, mixing, drying and compression moulding; Burning till in the preparation process of block base substrate; Be heated to 800 ℃ of insulations 6 hours earlier, form spinel type sosoloid, continue to be warmed up to 1250 ℃ of insulations 6 hours then; It is heterogeneous compound that spinel type sosoloid and silicate minerals are carried out, and forms the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 450 mesh sieves, prepare heterogeneous compound system ir radiation powder.
Each mass ratio of forming is in the inorganic combination auxiliary agent: 30%Al
2O
3, 38%SiO
2, 10%MgO, 10%TiO
2, 2%NiO and 10%B
2O
5, form through mixed preparing.
After the refractory material matrix surface purged,, form infrared radiating coating behind the dry solidification at the above-mentioned infrared radiation coating of surperficial spary.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 wavebands is that the radiant ratio of 0.90,8 μ m ~ 14 mu m wavebands is that the radiant ratio of 0.93,14 μ m ~ 25 mu m wavebands is 0.94.The thermal conductivity of infrared radiating coating under 1000 ℃ is 0.30W/ (mK).Infrared radiating coating carries out air naturally cooling thermal shock circulation in ℃ scope of normal temperature ~ 1200, the coatingsurface flawless that circulates 30 times, and coating does not come off.
Embodiment 4
By mass ratio is the prescription 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; Above-mentioned various components are weighed by proportioning; Mixed 5 hours, and promptly made the infrared radiation coating of thick suspension.
Wherein, the mass ratio of each component is in the heterogeneous compound system ir radiation of the spinel-silicate powder:
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, and it is block base substrate that this batching is carried out ball milling, mixing, drying and compression moulding; Burning till in the preparation process of block base substrate; Be heated to 980 ℃ of insulations 1 hour earlier, form spinel type sosoloid, continue to be warmed up to 1100 ℃ of insulations 8 hours then; It is heterogeneous compound that spinel type sosoloid and silicate minerals are carried out, and forms the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 230 mesh sieves, prepare heterogeneous compound system ir radiation powder.
Each mass ratio of forming is in the inorganic combination auxiliary agent: 30%Al
2O
3, 40%SiO
2, 7%MgO, 3%TiO
2, 10%NiO, 5%Cr
2O
3With 5% B
2O
5, form through mixed preparing.
After the refractory material matrix surface purged,, form infrared radiating coating behind the dry solidification at the above-mentioned infrared radiation coating of surperficial spary.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 wavebands is that the radiant ratio of 0.92,8 μ m ~ 14 mu m wavebands is that the radiant ratio of 0.93,14 μ m ~ 25 mu m wavebands is 0.93.The thermal conductivity of infrared radiating coating under 1000 ℃ is 0.27W/ (mK).Infrared radiating coating carries out air naturally cooling thermal shock circulation in ℃ scope of normal temperature ~ 1200, the coatingsurface flawless that circulates 30 times, and coating does not come off.
Embodiment 5
By mass ratio is the prescription 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; Above-mentioned various components are weighed by proportioning; Mixed 2 hours, and promptly made the infrared radiation coating of thick suspension.
Wherein, the mass ratio of each component is in the heterogeneous compound system ir radiation of the spinel-silicate powder: 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, and it is block base substrate that this batching is carried out ball milling, mixing, drying and compression moulding; Burning till in the preparation process of block base substrate; Be heated to 850 ℃ of insulations 4 hours earlier, form spinel type sosoloid, continue to be warmed up to 1100 ℃ of insulations 8 hours then; It is heterogeneous compound that spinel type sosoloid and silicate minerals are carried out, and forms the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 300 mesh sieves, prepare heterogeneous compound system ir radiation powder.
The mass ratio of each component is in the inorganic combination auxiliary agent: 40%Al
2O
3, 40%SiO
2, 6%MgO, 6%TiO
2And 8%Cr
2O
3, form through mixed preparing.
After the refractory material matrix surface purged,, form infrared radiating coating behind the dry solidification at the above-mentioned infrared radiation coating of surperficial spary.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 wavebands is that the radiant ratio of 0.90,8 μ m ~ 14 mu m wavebands is that the radiant ratio of 0.92,14 μ m ~ 25 mu m wavebands is 0.91.The thermal conductivity of infrared radiating coating under 1000 ℃ is 0.28W/ (mK).Infrared radiating coating carries out air naturally cooling thermal shock circulation in ℃ scope of normal temperature ~ 1200, the coatingsurface flawless that circulates 30 times, and coating does not come off.
Embodiment 6
By mass ratio is the prescription 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; Above-mentioned various components are weighed by proportioning; Mixed 2 hours, and promptly made the infrared radiation coating of thick suspension.
Wherein, the mass ratio of each component is in the heterogeneous compound system ir radiation of the spinel-silicate powder: 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, and it is block base substrate that this batching is carried out ball milling, mixing, drying and compression moulding; Burning till in the preparation process of block base substrate; Be heated to 900 ℃ of insulations 6 hours earlier, form spinel type sosoloid, continue to be warmed up to 1150 ℃ of insulations 6 hours then; It is heterogeneous compound that spinel type sosoloid and silicate minerals are carried out, and forms the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 200 mesh sieves, prepare heterogeneous compound system ir radiation powder.
Each mass ratio of forming is in the inorganic combination auxiliary agent: 30%Al
2O
3, 50%SiO
2, 8%MgO, 2%TiO
2, 2%NiO, 3%Cr
2O
3With 5% B
2O
5, form through mixed preparing.
After the refractory material matrix surface purged,, form infrared radiating coating behind the dry solidification at the above-mentioned infrared radiation coating of surperficial spary.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 wavebands is that the radiant ratio of 0.91,8 μ m ~ 14 mu m wavebands is that the radiant ratio of 0.92,14 μ m ~ 25 mu m wavebands is 0.93.The thermal conductivity of infrared radiating coating under 1000 ℃ is 0.25W/ (mK).Infrared radiating coating carries out air naturally cooling thermal shock circulation in ℃ scope of normal temperature ~ 1200, the coatingsurface flawless that circulates 30 times, and coating does not come off.
Embodiment 7
By mass ratio is the prescription 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; Above-mentioned various components are weighed by proportioning; Mixed 6 hours, and promptly made the infrared radiation coating of thick suspension.
Wherein, the mass ratio of each component is in the heterogeneous compound system ir radiation of the spinel-silicate powder: 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, and it is block base substrate that this batching is carried out ball milling, mixing, drying and compression moulding; Burning till in the preparation process of block base substrate; Be heated to 900 ℃ of insulations 3 hours earlier, form spinel type sosoloid, continue to be warmed up to 1300 ℃ of insulations 4 hours then; It is heterogeneous compound that spinel type sosoloid and silicate minerals are carried out, and forms the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 325 mesh sieves, prepare heterogeneous compound system ir radiation powder.
Each mass ratio of forming is in the inorganic combination auxiliary agent: 20%Al
2O
3, 60%SiO
2, 3%MgO, 7%TiO
2, 4%NiO and 6%Cr
2O
3, form through mixed preparing.
After the refractory material matrix surface purged,, form infrared radiating coating behind the dry solidification at the above-mentioned infrared radiation coating of surperficial spary.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 wavebands is that the radiant ratio of 0.90,8 μ m ~ 14 mu m wavebands is that the radiant ratio of 0.91,14 μ m ~ 25 mu m wavebands is 0.93.The thermal conductivity of infrared radiating coating under 1000 ℃ is 0.27W/ (mK).Infrared radiating coating carries out air naturally cooling thermal shock circulation in ℃ scope of normal temperature ~ 1200, the coatingsurface flawless that circulates 30 times, and coating does not come off.
Embodiment 8
By mass ratio is the prescription 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; Above-mentioned various components are weighed by proportioning; Mixed 4 hours, and promptly made the infrared radiation coating of thick suspension.
Wherein, the mass ratio of each component is in the heterogeneous compound system ir radiation of the spinel-silicate powder: 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, and it is block base substrate that this batching is carried out ball milling, mixing, drying and compression moulding; Burning till in the preparation process of block base substrate; Be heated to 850 ℃ of insulations 6 hours earlier, form spinel type sosoloid, continue to be warmed up to 1300 ℃ of insulations 3 hours then; It is heterogeneous compound that spinel type sosoloid and silicate minerals are carried out, and forms the black sintered compact of heterogeneous composite structure; Through fragmentation, pulverizing and mistake 400 mesh sieves, prepare heterogeneous compound system ir radiation powder.
Each mass ratio of forming is in the inorganic combination auxiliary agent: 35%Al
2O
3, 45%SiO
2, 5%MgO, 8%TiO
2, 4%Cr
2O
3And 3%B
2O
5, form through mixed preparing.
After the refractory material matrix surface purged,, form infrared radiating coating behind the dry solidification at the above-mentioned infrared radiation coating of surperficial spary.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 wavebands is that the radiant ratio of 0.93,8 μ m ~ 14 mu m wavebands is that the radiant ratio of 0.94,14 μ m ~ 25 mu m wavebands is 0.94.The thermal conductivity of infrared radiating coating under 1000 ℃ is 0.29W/ (mK).Infrared radiating coating carries out air naturally cooling thermal shock circulation in ℃ scope of normal temperature ~ 1200, the coatingsurface flawless that circulates 30 times, and coating does not come off.
Prove through the ir radiation property testing; 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 that the radiant ratio of 0.90 ~ 0.93,8 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 under 1000 ℃ is 0.25 ~ 0.31W/ (mK).In ℃ scope of normal temperature ~ 1200, carry out air naturally cooling thermal shock circulation, the coatingsurface flawless that circulates 30 times, coating does not come off.
The above is merely embodiments of the invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1.
Can form the infrared radiation coating of low thermal conductivity coatingFormed through mixed preparing by following component, said 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%, skimmer: 0 ~ 1%, flow agent: 0 ~ 1%.
2. described by claim 1
Can form the infrared radiation coating of low thermal conductivity coating, it is characterized in that said each component and component concentration thereof are by mass percentage: the heterogeneous compound system ir radiation of spinel-silicate powder: pore-forming material 40%: six potassium titanates 5%: water glass 10%: water 30%: inorganic combination auxiliary agent 5%: anti-sedimentation agent 6.7%: dispersion agent 1%: skimmer 2%: flow agent 0.2%: 0.1%.
3. described by claim 1 or 2
Can form the infrared radiation coating of low thermal conductivity coatingThe preparation method who it is characterized in that 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 the rough handling that ball milling, mixing, drying and compression moulding are block base substrate; Described raw material comprises the A component of tangible one-tenth spinel type sosoloid, the 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 heat tracing in 800 ~ 980 ℃ of TRs, the heat tracing time is 1 ~ 6 hour, forms spinel type sosoloid; Continue then to be warmed up in 1100 ~ 1300 ℃ of TRs and carry out heat tracing, be incubated 2 ~ 8 hours, form silicate minerals, it is heterogeneous compound that spinel type sosoloid and silicate minerals are carried out, and forms the black sintered compact of heterogeneous composite structure; 3) with 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.
4. described by claim 3
Can form the infrared radiation coating of low thermal conductivity coating, it is characterized in that 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%, more than be the mass percent meter.
5. described by claim 4
Can form the infrared radiation coating of low thermal conductivity coating, it is characterized in that described inorganic combination adjuvant component is preferably: Al
2O
3: SiO 20%,
2: 60%, MgO:5%, TiO
2: 2%, NiO:5%, Cr
2O
3: B 5%,
2O
5: 3%, more than be the mass percent meter.
6. described by claim 1
Can form the infrared radiation coating of low thermal conductivity coating, it is characterized in that described pore-forming material is made up of graphite and starch, the mass ratio of graphite and starch is 50%:50%.
7. described by claim 1
Can form the infrared radiation coating of low thermal conductivity coating, it is characterized in that described anti-sedimentation agent is an organobentonite; Described dispersion agent is a sodium phosphate; Described skimmer is a tributyl phosphate; Described flow agent is a 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961360A (en) * | 2020-08-27 | 2020-11-20 | 长沙三思新材料科技有限公司 | Anti-radiation composite inorganic coating |
| CN113755045A (en) * | 2021-10-27 | 2021-12-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Infrared radiation coating and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219495A (en) * | 2011-03-29 | 2011-10-19 | 广东新劲刚超硬材料有限公司 | Infrared radiation coating and use method thereof |
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2012
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219495A (en) * | 2011-03-29 | 2011-10-19 | 广东新劲刚超硬材料有限公司 | Infrared radiation coating and use method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111961360A (en) * | 2020-08-27 | 2020-11-20 | 长沙三思新材料科技有限公司 | Anti-radiation composite inorganic coating |
| CN113755045A (en) * | 2021-10-27 | 2021-12-07 | 攀钢集团攀枝花钢铁研究院有限公司 | Infrared radiation coating and preparation method thereof |
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