CN117602952A - Nano ceramic fiber paste and preparation method thereof - Google Patents
Nano ceramic fiber paste and preparation method thereof Download PDFInfo
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- CN117602952A CN117602952A CN202311693150.0A CN202311693150A CN117602952A CN 117602952 A CN117602952 A CN 117602952A CN 202311693150 A CN202311693150 A CN 202311693150A CN 117602952 A CN117602952 A CN 117602952A
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- 239000000835 fiber Substances 0.000 title claims abstract description 98
- 239000000919 ceramic Substances 0.000 title claims abstract description 41
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000000843 powder Substances 0.000 claims abstract description 81
- 239000002002 slurry Substances 0.000 claims abstract description 63
- 239000011230 binding agent Substances 0.000 claims abstract description 55
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 51
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 42
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000002131 composite material Substances 0.000 claims abstract description 34
- 239000002994 raw material Substances 0.000 claims abstract description 30
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 21
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 21
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 21
- 239000002904 solvent Substances 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 17
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 15
- 239000004927 clay Substances 0.000 claims description 13
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 12
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 12
- 235000019830 sodium polyphosphate Nutrition 0.000 claims description 12
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 12
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 11
- 229910052726 zirconium Inorganic materials 0.000 claims description 11
- 229920002472 Starch Polymers 0.000 claims description 8
- 235000019698 starch Nutrition 0.000 claims description 8
- 239000008107 starch Substances 0.000 claims description 8
- 239000004034 viscosity adjusting agent Substances 0.000 claims description 8
- HFZLSTDPRQSZCQ-UHFFFAOYSA-N 1-pyrrolidin-3-ylpyrrolidine Chemical group C1CCCN1C1CNCC1 HFZLSTDPRQSZCQ-UHFFFAOYSA-N 0.000 claims description 7
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000012512 characterization method Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims 2
- 239000002121 nanofiber Substances 0.000 claims 2
- 239000011819 refractory material Substances 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 8
- 238000003860 storage Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
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Abstract
The invention relates to a nano ceramic fiber paste and a preparation method thereof, wherein the nano ceramic fiber paste comprises powder and slurry, and the mass ratio of the powder to the slurry is 4-5:1-5; the raw materials of the powder comprise, by mass, 5% -12% of gas phase nano silicon dioxide, 6% -15% of ultrafine titanium dioxide, 25% -40% of a binder and 3% -10% of active alumina micropowder; the raw materials of the slurry comprise, by mass, 2% -6% of a viscosity regulator, 10% -20% of high-temperature resistant fibers, 2% -5% of a composite binder and 1% -5% of a solvent. The invention has the advantages that the problems that the refractory material is easy to fall off, the storage time is short and hardening occurs are effectively solved based on the compatibility of the activated alumina micro powder and the inorganic powder and the addition of the liquid polyacrylamide.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a nano ceramic fiber paste and a preparation method thereof.
Background
The high-temperature kiln is equipment frequently used by modern enterprises and is generally composed of four parts of a kiln chamber, combustion equipment, ventilation equipment and conveying equipment, a furnace lining is an essential part in the kiln chamber, and the high-temperature kiln can maintain the temperature in the kiln and reduce the waste of fuel.
The high-temperature ceramic fiber is an energy-saving and environment-friendly refractory material which is developed in recent years. The fibrous light refractory material has the advantages of light weight, high temperature resistance, good heat stability, low heat conductivity, small specific heat, mechanical shock resistance and the like, and is widely applied to industries such as machinery, metallurgy, chemical industry, petroleum, ceramics, glass, electronics and the like.
Along with the continuous increase of the ceramic market demand, the required quality is higher and higher, the refractory material in the current market has short storage period time, and the phenomenon of hardening appears when the refractory material is used, so that the refractory material is easy to fall off, and the service life of the refractory material and the service life of a kiln are directly influenced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a nano ceramic fiber paste and a preparation method thereof, and effectively solves the problems that a refractory material is easy to fall off, has short storage time and is hard based on the compatibility of active alumina micro powder and inorganic powder and the addition of liquid polyacrylamide.
The invention is realized by the following technical scheme: in one aspect, the nano ceramic fiber paste comprises powder and slurry, wherein the mass ratio of the powder to the slurry is 4-5:1-5
The raw materials of the powder comprise, by mass, 5% -12% of gas phase nano silicon dioxide, 6% -15% of ultrafine titanium dioxide, 25% -40% of binder and 3% -10% of active alumina micropowder;
the raw materials of the slurry comprise, by mass, 2% -6% of a viscosity regulator, 10% -20% of high-temperature resistant fibers, 2% -5% of a composite binder and 1% -5% of a solvent.
Through the technical scheme, the nano ceramic fiber paste has the advantages of high refractoriness, high bonding strength, low linear change rate, stable volume, corrosion resistance, good construction performance and the like, and the refractoriness is up to above 1600 ℃, so that the market demand can be completely met.
Further, the binder is one of clay or silicate.
Through the technical scheme, the viscosity of the ceramic clay is increased to improve the adhesive force of the product when the ceramic clay is baked at low temperature, and the ceramic clay is sintered to form ceramic crystalline phase combination after the ceramic clay is attached to high temperature.
Further, the particle size of the active alumina micropowder is 4nm-6nm.
Through the technical scheme, the active nano alumina micro powder is introduced to improve the refractoriness of the product and keep good thermal shock stability.
Further, the viscosity modifier is one of EVA, liquid polyacrylamide and starch ether.
Through the technical scheme, the viscosity regulator is adopted to increase the viscosity of the fiber paste and improve the wettability of the product.
Further, the high temperature resistant fiber is composed of hollow alumina polycrystalline fiber, zirconium fiber and high alumina fiber, wherein the hollow alumina polycrystalline fiber is formed by the following steps: zirconium fiber: the length-diameter ratio of the high alumina fiber is 1:2:3.
through the technical scheme, the high-temperature resistant fiber adopted by the invention has certain continuity and heat preservation performance.
Further, the composite binding agent consists of a binding agent SP159, sodium polyphosphate and sodium hexametaphosphate; the binding agent SP159: sodium polyphosphate: the mass ratio of the sodium hexametaphosphate is 1:3:5;
through the technical scheme, the composite binding agent is adopted to increase the moisturizing effect of the product and prolong the preservation period of the product.
Also provided is a method for preparing the nano ceramic fiber paste, comprising the following steps:
step S1, uniformly dispersing gas phase nano silicon dioxide, ultrafine titanium dioxide, a binder and active alumina micro powder according to the prescription amount to prepare powder;
step S2, uniformly mixing and stirring the high-temperature resistant fiber, the solvent, the viscosity regulator and the composite binding agent according to the prescription amount to prepare slurry;
step S3: and (3) adding the powder in the step (S1) into the slurry in the step (S2), wherein the mass ratio of the slurry to the powder is 5:4, and stirring uniformly to obtain the composite material.
Through the technical scheme, the production process of the nano ceramic fiber paste is mature, the production cost is low, the popularization and the application are easy, and the economic and social benefits are good.
Further, in step S1, the mixing time is 10 to 35 minutes.
Further, in step S2, the mixing time is 10 to 25 minutes.
Further, in step S3, the resulting nanoceramic fiber paste includes the following performance characterizations: the density of the paste is 1.22 to 1.25 plus or minus 0.1g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The density after drying is 0.68-0.71+/-0.1 g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The line change rate is 0.65 plus or minus 0.1; transverse strength: 25+ -3.5 g/cm 2 。
Through the technical scheme, the nano ceramic fiber paste prepared by the invention is used for the inner wall of a kiln, so that the kiln body can be effectively protected, and the service life of the kiln body can be prolonged.
The invention has the beneficial effects that:
1) The invention is based on the compatibility of the active alumina micro powder and the inorganic powder and the addition of the liquid polyacrylamide, and effectively solves the problems that the refractory material is easy to fall off, has short storage time and is hard.
2) The nano ceramic fiber paste prepared by the invention has the advantages of high refractoriness, high bonding strength, low linear change rate, stable volume, corrosion resistance, good workability and the like, and the refractoriness is up to above 1600 ℃, so that the market demand can be completely met.
3) The nano ceramic fiber paste prepared by the invention has the advantages of mature production process, low production cost, easy popularization and application and better economic and social benefits.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described in the following in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The experimental procedures, which do not address the specific conditions in the examples below, are generally carried out under conventional conditions or under conditions recommended by the manufacturer. All percentages, ratios, proportions or parts are by weight unless otherwise indicated.
Example 1
The raw materials of the nano ceramic fiber paste comprise powder and slurry, and the mass ratio of the powder to the slurry is 4:5
The raw materials of the powder comprise, by mass, 5.5% of gas phase nano silicon dioxide, 6% of ultrafine titanium dioxide, 25% of clay and 4% of activated alumina micropowder;
the raw materials of the slurry comprise 2.5% of viscosity modifier EVA, 12% of high temperature resistant fiber (hollow alumina polycrystalline fiber: zirconium fiber: high alumina fiber length-diameter ratio is 1:2:3), 2.3% of composite binder (binder SP159: sodium polyphosphate: sodium hexametaphosphate) and 1.2% of butyl propionate according to mass percentage.
The method specifically comprises the following steps:
step S1, uniformly dispersing gas phase nano silicon dioxide, ultrafine titanium dioxide, a binder and active alumina micro powder according to the prescription amount to prepare powder;
step S2, uniformly mixing and stirring the high-temperature resistant fiber, the solvent, the viscosity regulator and the composite binding agent according to the prescription amount to prepare slurry;
step S3: and (3) adding the powder in the step S1 into the slurry in the step S2, wherein the mass ratio of the slurry to the powder is 5:4, and uniformly stirring to obtain the composite material.
Example 2:
the raw materials of the nano ceramic fiber paste comprise powder and slurry, and the mass ratio of the powder to the slurry is 4:5
The raw materials of the powder comprise, by mass, 6% of gas phase nano silicon dioxide, 7.2% of ultrafine titanium dioxide, 26% of silicate and 5% of activated alumina micropowder;
the raw materials of the slurry comprise 2.7% of liquid polyacrylamide, 14% of high-temperature resistant fibers (hollow alumina polycrystalline fibers: zirconium fibers: high-alumina fibers with an aspect ratio of 1:2:3), 2.4% of composite binder (binder SP159: sodium polyphosphate: sodium hexametaphosphate with a mass ratio of 1:3:5) and 1.5% of butyl propionate according to mass percentages.
The method specifically comprises the following steps:
step S1, uniformly dispersing gas phase nano silicon dioxide, ultrafine titanium dioxide, a binder and active alumina micro powder according to the prescription amount to prepare powder;
step S2, uniformly mixing and stirring the high-temperature resistant fiber, the solvent, the viscosity regulator and the composite binding agent according to the prescription amount to prepare slurry;
step S3: and (3) adding the powder in the step S1 into the slurry in the step S2, wherein the mass ratio of the slurry to the powder is 5:4, and uniformly stirring to obtain the composite material.
Example 3:
the raw materials of the nano ceramic fiber paste comprise powder and slurry, and the mass ratio of the powder to the slurry is 4:5
The raw materials of the powder comprise 7% of gas phase nano silicon dioxide, 8.2% of ultrafine titanium dioxide, 27% of clay and 6% of activated alumina micropowder by mass percent;
the raw materials of the slurry comprise, by mass, 2.9% of starch ether, 16% of high-temperature resistant fibers (hollow alumina polycrystalline fibers: zirconium fibers: high-alumina fibers with an aspect ratio of 1:2:3), 2.6% of composite binder (binder SP159: sodium polyphosphate: sodium hexametaphosphate with a mass ratio of 1:3:5) and 1.7% of butyl propionate.
The method specifically comprises the following steps:
step S1, uniformly dispersing gas phase nano silicon dioxide, ultrafine titanium dioxide, a binder and active alumina micro powder according to the prescription amount to prepare powder;
step S2, uniformly mixing and stirring the high-temperature resistant fiber, the solvent, the viscosity regulator and the composite binding agent according to the prescription amount to prepare slurry;
step S3: and (3) adding the powder in the step S1 into the slurry in the step S2, wherein the mass ratio of the slurry to the powder is 5:4, and uniformly stirring to obtain the composite material.
Example 4:
the raw materials of the nano ceramic fiber paste comprise powder and slurry, and the mass ratio of the powder to the slurry is 4:5
The raw materials of the powder comprise 8% of gas phase nano silicon dioxide, 9.2% of ultrafine titanium dioxide, 28% of clay and 7% of active alumina micropowder by mass percent;
the raw materials of the slurry comprise 3.2% of viscosity modifier (EVA, liquid polyacrylamide and starch ether), 18% of high-temperature resistant fiber (hollow alumina polycrystalline fiber: zirconium fiber: high alumina fiber with the length-diameter ratio of 1:2:3), 2.8% of composite binder (binder SP159: sodium polyphosphate: sodium hexametaphosphate with the mass ratio of 1:3:5) and 2.0% of butyl propionate according to mass percentage.
The method specifically comprises the following steps:
step S1, uniformly dispersing gas phase nano silicon dioxide, ultrafine titanium dioxide, a binder and active alumina micro powder according to the prescription amount to prepare powder;
step S2, uniformly mixing and stirring the high-temperature resistant fiber, the solvent, the viscosity regulator and the composite binding agent according to the prescription amount to prepare slurry;
step S3: and (3) adding the powder in the step S1 into the slurry in the step S2, wherein the mass ratio of the slurry to the powder is 5:4, and uniformly stirring to obtain the composite material.
Example 5:
the raw materials of the nano ceramic fiber paste comprise powder and slurry, and the mass ratio of the powder to the slurry is 4:5
The raw materials of the powder comprise 9% of gas phase nano silicon dioxide, 10.2% of ultrafine titanium dioxide, 30% of binder (clay/silicate) and 8% of active alumina micropowder according to mass percentage;
the raw materials of the slurry comprise 3.5% of viscosity modifier (EVA/liquid polyacrylamide/starch ether), 19% of high-temperature resistant fiber (hollow alumina polycrystalline fiber/zirconium fiber/high alumina fiber), 3% of composite binder (binder SP159: sodium polyphosphate: sodium hexametaphosphate in a mass ratio of 1:3:5) and 2.2% of butyl propionate.
The method specifically comprises the following steps:
step S1, uniformly dispersing gas phase nano silicon dioxide, ultrafine titanium dioxide, a binder and active alumina micro powder according to the prescription amount to prepare powder;
step S2, uniformly mixing and stirring the high-temperature resistant fiber, the solvent, the viscosity regulator and the composite binding agent according to the prescription amount to prepare slurry;
step S3: and (3) adding the powder in the step S1 into the slurry in the step S2, wherein the mass ratio of the slurry to the powder is 5:4, and uniformly stirring to obtain the composite material.
Example 6:
the raw materials of the nano ceramic fiber paste comprise powder and slurry, and the mass ratio of the powder to the slurry is 4:5
The raw materials of the powder comprise, by mass, 11% of gas phase nano silicon dioxide, 10% of ultrafine titanium dioxide, 33% of binder (clay/silicate) and 10% of active alumina micropowder;
the raw materials of the slurry comprise 3.5% of viscosity modifier (EVA/liquid polyacrylamide/starch ether), 20% of high-temperature resistant fiber (hollow alumina polycrystalline fiber/zirconium fiber/high alumina fiber), 3.2% of composite binder (binder SP159: sodium polyphosphate: sodium hexametaphosphate in a mass ratio of 1:3:5) and 2.3% of butyl propionate.
The method specifically comprises the following steps:
step S1, uniformly dispersing gas phase nano silicon dioxide, ultrafine titanium dioxide, a binder and active alumina micro powder according to the prescription amount to prepare powder;
step S2, uniformly mixing and stirring the high-temperature resistant fiber, the solvent, the viscosity regulator and the composite binding agent according to the prescription amount to prepare slurry;
step S3: and (3) adding the powder in the step S1 into the slurry in the step S2, wherein the mass ratio of the slurry to the powder is 5:4, and uniformly stirring to obtain the composite material.
Comparative example 1:
the raw materials of the nano ceramic fiber paste comprise powder and slurry, and the mass ratio of the powder to the slurry is 3:2
The raw materials of the powder comprise 8% of gas phase nano silicon dioxide, 9.2% of ultrafine titanium dioxide, 28% of binder (clay/silicate) and 7% of active alumina micropowder according to mass percentage;
the raw materials of the slurry comprise 3.2% of viscosity modifier (EVA/liquid polyacrylamide/starch ether), 8% of high-temperature resistant fiber (hollow alumina polycrystalline fiber/zirconium fiber/high alumina fiber), 2.8% of composite binder (binder SP159: sodium polyphosphate: sodium hexametaphosphate in a mass ratio of 1:3:5) and 2.0% of solvent (butyl acetate).
The method specifically comprises the following steps:
step S1, uniformly dispersing gas phase nano silicon dioxide, ultrafine titanium dioxide, a binder and active alumina micro powder according to the prescription amount to prepare powder;
step S2, uniformly mixing and stirring the high-temperature resistant fiber, the solvent, the viscosity regulator and the composite binding agent according to the prescription amount to prepare slurry;
step S3: and (3) adding the powder in the step S1 into the slurry in the step S2, wherein the mass ratio of the slurry to the powder is 2:3, and uniformly stirring to obtain the composite material.
Comparative example 2:
the raw materials of the nano ceramic fiber paste comprise powder and slurry, and the mass ratio of the powder to the slurry is 1:5
The raw materials of the powder comprise, by mass, 11% of gas phase nano silicon dioxide, 10% of ultrafine titanium dioxide, 33% of binder (clay/silicate) and 10% of active alumina micropowder;
the raw materials of the slurry comprise 3.5% of viscosity modifier (EVA/liquid polyacrylamide/starch ether), 10% of high-temperature resistant fiber (hollow alumina polycrystalline fiber/zirconium fiber/high alumina fiber), 3.2% of composite binder (binder SP159: sodium polyphosphate: sodium hexametaphosphate in a mass ratio of 1:3:5) and 2.3% of solvent (butyl acetate).
The method specifically comprises the following steps:
step S1, uniformly dispersing gas phase nano silicon dioxide, ultrafine titanium dioxide, a binder and active alumina micro powder according to the prescription amount to prepare powder;
step S2, uniformly mixing and stirring the high-temperature resistant fiber, the solvent, the viscosity regulator and the composite binding agent according to the prescription amount to prepare slurry;
step S3: and (3) adding the powder in the step S1 into the slurry in the step S2, wherein the mass ratio of the slurry to the powder is 5:1, and uniformly stirring to obtain the composite material.
Effect comparative example
The nano ceramic fiber pastes prepared in examples 1 to 6 and comparative examples 1 to 2 were used as follows:
1) Adding water into the nano ceramic fiber paste in the embodiment and uniformly mixing;
2) Pouring the mixed nano ceramic fiber paste into a positioning die of a kiln, and continuously vibrating until bubbles completely disappear after the nano ceramic fiber paste is metered by a vibrating table according to the volume weight set by the requirement;
3) Removing the mould, wetting and curing with water, and drying in the shade;
4) And (5) after a period of time, drying.
According to the above-mentioned using steps, the performance of the model produced in each embodiment is detected, and the detection items include:
breaking strength detection: the detection condition is 1850 ℃ temperature, the temperature is kept for 3 hours, and the temperature naturally drops to normal temperature, and the result is as follows:
compressive strength detection: the detection condition is 1850 temperature, the temperature is kept for 3 hours, and the temperature naturally drops to normal temperature, and the result is as follows:
and (3) detecting the volume density after burning: the detection condition is 1850 temperature, the temperature is monitored for 3 hours and naturally falls to normal temperature, and the result is as follows:
and (3) temperature drop detection: the detection conditions are that under the temperature condition of 120 ℃, each time of detection is carried out for 1h, and the result is as follows:
from the experimental data, the nano ceramic fiber paste has the advantages of high refractoriness, high bonding strength, low linear change rate, stable volume, corrosion resistance, good construction performance and the like, and the refractoriness is up to above 1600 ℃, so that the market demand can be completely met.
Finally, it should be noted that: the foregoing description is only illustrative of the preferred embodiments of the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements or changes may be made without departing from the spirit and principles of the present invention.
Claims (10)
1. The nano ceramic fiber paste is characterized by comprising powder and slurry, wherein the mass ratio of the powder to the slurry is 4-5:1-5;
the raw materials of the powder comprise, by mass, 5% -12% of gas phase nano silicon dioxide, 6% -15% of ultrafine titanium dioxide, 25% -40% of binder and 3% -10% of active alumina micropowder;
the raw materials of the slurry comprise, by mass, 2% -6% of a viscosity regulator, 10% -20% of high-temperature resistant fibers, 2% -5% of a composite binder and 1% -5% of a solvent.
2. The nanofiber paste of claim 1, wherein the binder is one of clay or silicate; the solvent is butyl propionate.
3. The nano ceramic fiber paste according to claim 1, wherein the particle size of the activated alumina micro powder is 4nm-6nm.
4. The nanofiber paste of claim 1, wherein the viscosity modifier is one of EVA, liquid polyacrylamide, starch ether.
5. The nanoceramic fiber paste of claim 1, wherein the high temperature resistant fibers are comprised of hollow alumina polycrystalline fibers, zirconia fibers, and high alumina fibers, the hollow alumina polycrystalline fibers: zirconium fiber: the length-diameter ratio of the high alumina fiber is 1:2:3.
6. the nano ceramic fiber paste according to claim 1, wherein the composite binder is composed of a binder SP159, sodium polyphosphate, sodium hexametaphosphate; the binding agent SP159: sodium polyphosphate: the mass ratio of the sodium hexametaphosphate is 1:3:5.
7. A method of preparing the nanoceramic fiber paste of any one of claims 1 to 6, comprising the steps of:
step S1, uniformly dispersing gas phase nano silicon dioxide, ultrafine titanium dioxide, a binder and active alumina micro powder according to the prescription amount to prepare powder;
step S2, uniformly mixing and stirring the high-temperature resistant fiber, the solvent, the viscosity regulator and the composite binding agent according to the prescription amount to prepare slurry;
step S3: and (3) adding the powder in the step (S1) into the slurry in the step (S2), wherein the mass ratio of the slurry to the powder is 5:4, and stirring uniformly to obtain the composite material.
8. The method of producing a nano ceramic fiber paste according to claim 7, wherein the mixing time is 10 to 35 minutes in the step S1.
9. The method of producing a nano ceramic fiber paste according to claim 7, wherein the mixing time is 10 to 25 minutes in step S2.
10. The method of preparing a nano ceramic fiber paste according to claim 7, wherein in step S3, the obtained nano ceramic fiber paste comprises the following performance characterizations: the density of the paste is 1.22 to 1.25 plus or minus 0.1g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The density after drying is 0.68-0.71+/-0.1 g/cm 3 The method comprises the steps of carrying out a first treatment on the surface of the The line change rate is 0.65 plus or minus 0.1; transverse strength: 25+ -3.5 g/cm 2 。
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