CN104876553A - Nano ceramic electric heating element and manufacturing method thereof - Google Patents
Nano ceramic electric heating element and manufacturing method thereof Download PDFInfo
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- CN104876553A CN104876553A CN201510214325.4A CN201510214325A CN104876553A CN 104876553 A CN104876553 A CN 104876553A CN 201510214325 A CN201510214325 A CN 201510214325A CN 104876553 A CN104876553 A CN 104876553A
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Abstract
The invention relates to a nano ceramic electric heating element which comprises an electric heating element and a ceramic surface, wherein the ceramic surface is a composite nano ceramic material. The material is prepared from the following raw materials in percentage by weight: 61-69% of base material, 5-10% of nano cerium oxide, 15-20% of adhesive, 2.1-2.5% of stabilizer and the balance of solvent. The base material is composed of 10-50% of aluminum oxide, 40-60% of boron nitride and 10-50% of silicon carbide. The nano ceramic layer of the electric heating element has the advantages of high bonding strength, thermal shock resistance, no cracking and the like. The allowable temperature of the electric heating element is up to 300-2900 DEG C, the electrothermal transformation rate is up to 95%, and the effective life is more than 5 years. The nano ceramic electric heating element has wide wave range composite and protective properties (corrosion resistance, abrasion resistance and pollution slag resistance). The manufacturing technique does not change the structure of the electric heating element, and is simple to implement. The nano ceramic electric heating element is safe, energy-saving and environment-friendly.
Description
Technical field
The present invention relates to a kind of electrical heating element, especially a kind of nano ceramics electrical heating element and manufacture method thereof.
Background technology
The energy is the basic substance that the mankind depend on for existence, plays irreplaceable vital role in human society.Along with the fast development of national economy, China's energy demand is increasing, the low important factor having become the restriction national economic development of Energy efficiency.
Electrical heating element is electric energy is the energy conversion device of heat energy by resistance element converting electric energy, because of be easy to control and regulate and free from environmental pollution, the advantage and being widely used such as be conducive to improving the quality of products, but energy conversion rate is lower, along with luminescence process in element high temperature oxidation and corrosion, heating process, electrical heating element energy conversion rate is made only to reach 60% to 70%, under this background, the development research of Novel heating material has been become to the study hotspot of Materials science and energy development neck.
To electrical heating element, improve thermo-efficiency, mainly will improve the emissive power of electrical heating element and concentrate directive by heated parts heat, because the application of employing High Radiant Rate Coating is simple, less investment, successful, as Infrared electrothermal element, application is more and more extensive recently.
Infrared electrothermal element utilizes electromagnetic radiation heat to pass principle, conduct heat in direct mode and reach heat temperature raising object, thus avoid the power loss that heat hot medium body causes, be conducive to save energy, simultaneously infrared rays have that controllability is good, heating rapidly, productivity improves, the advantages such as homogeneous heating, but due to can not use high temperature more than 1200 DEG C easily come off with coating and limit its development use.
Infrared electrothermal element, the High Radiant Rate Coating of employing is made up of radiant powder basic material and carrier adhesive.Wherein, the effect of radiant powder basic material is to provide high radiance, and carrier adhesive then makes coating be bonded in electrical heating element surface securely.The subject matter of current existence has: (1) high temperature thermal shock resistance is poor.The radiation paint high temperature thermal shock resistance on Infrared electrothermal element surface is effectively solved, and there be limited evidence currently of has can the ripe Infrared electrothermal element of long term operation abrasion environment more than 1000 DEG C.(2) research of high temperature tamanori is few, and self-repairability is not enough.The radiation paint of current Infrared electrothermal element, once there be sub-fraction destruction all to change, which results in the very large waste of human and material resources.
Summary of the invention
For solving the problem, the invention provides a kind of energy-efficient nano ceramics electrical heating element, this electrical heating element resistance to elevated temperatures is good, and insulation strength is high, and capacity usage ratio is high.
The present invention is the technical scheme solving the problems of the technologies described above employing:
A kind of nano ceramics electrical heating element, comprise electrical heating element and ceramic surface, described ceramic surface is a kind of composite nano-ceramic material, and this material is made up of the raw material of following weight percent:
Surplus is solvent;
Wherein, described base-material by accounting for that base-material total weight percent is the aluminum oxide of 10%-50%, the silicon carbide of the boron nitride of 40%-60% and 10%-50% forms.
Further, described stablizer is wilkinite or kaolin.
Further, described solvent is selected from one or more of butyl, alcohol and water.
Further, described tackiness agent is potassium silicate solution or aluminum phosphate solution.
Manufacture the method for above-mentioned nano ceramics electrical heating element, comprise the steps:
1) carry out sandblasting on electrical heating element surface, remove surface and oil contaminant, the fine particle that dry after-blow clean surface is residual;
2) take base-material, nano-cerium oxide, tackiness agent, stablizer and solvent, be mixed with suspension, stir, obtain composite nano-ceramic slurry;
3) at electrical heating element surface spraying composite nano-ceramic slurry;
4) gained nano ceramics electrical heating element carries out dry solidification.
Further, described step 1) be specially: carry out sandblasting at electrical heating element surface quartz sand or garnet, surfaceness is 10-25 μm, removes surface and oil contaminant with alkaline cleaner, blows clean the fine particle of remained on surface after drying with pressurized air.
Further, described step 3) be specially: select Air spraying spray gun, adopt the pressurized air of 0.6-0.8MPa, at electrical heating element surface spraying composite nano-ceramic slurry, spray-coated film thickness is 0.03-0.06mm.
Further, described step 4) be specially: place 36-48h dry solidification or 80-90 DEG C of thermostatically heating 2-4h dry solidification under normal temperature.
Nano ceramics electrical heating element in use naturally heats up and sinters pottery into, and the stupalith of spraying and electrical heating element are combined closely with machinery, physics and high temperature solid state reaction chemical bond mode.
The composite nano-ceramic material that nano ceramics electrical heating element of the present invention uses is based on many oxide, nitride, carbide, composite precision makes the filler of polynary high strength, be composite additive again with rare earth oxide, with special addition agent, additive compatibility, make Novel composite nano stupalith.Form firmly coating after this composite material solidification, the highest can resistance to more than 2900 DEG C high temperature, increase substantially electrical heating element slin emissivity (or specific absorption), strengthening radiation heat transfer, prevent wearing and tearing, oxidation and corrosion.
The major technique that the present invention uses is:
Nano-corpuscule technology: composite nano-ceramic material is combined more tight with electrical heating element base material, and there is the overall characteristics such as anti-Slagging, corrosion-resistant and wearing and tearing.
Rare earth casting charge technology: cerium oxide improves the emittance characteristic of electrical heating element, makes electrical heating element within the scope of wide band, have stable compound, and does not decay in time.
Adhesive system technology: the optimum combination of multiple mineral binder bond, is applicable to different electrical heating element base material, applied environment, guarantees high-efficiency energy-saving nano ceramic electrothermal element not powder of detached, stable and reliable for performance.
Nano ceramics electrical heating element of the present invention, by spraying a kind of ultra-fine composite nano-ceramic material at electrical heating element substrate surface, after drying is solidified and in use intensification sinters naturally, one deck ultra-thin ceramic film is formed at electrical heating element substrate surface, combine closely with machinery, physics and high temperature solid state reaction chemical bond mode with base material, there is the feature of metal and pottery simultaneously.By spraying composite nano-ceramic material, make electrical heating element substrate surface ceramic, with the surface recombination with wide infrared spectrum scope, stability and durability, anti-Slagging (automatically cleaning), significantly can promote the heat transfer characteristic (radiation and heat conduction) of electrical heating element, electric conversion rate brings up to 95%; Coated material has fabulous high-temperature physics chemical stability, high temperature oxidation resisting, corrosion and wearing and tearing simultaneously; The fine and close composite nano-ceramic novel material of superfine ultrathin and electrical heating element surface elevation combine, even if at high temperature also difficult drop-off, efflorescence, the life-span is lasting.Compare general electrical heating element, electric conversion rate height 25%-35%, extend 2-3 work-ing life doubly.
Beneficial effect of the present invention is: the advantage such as the nano ceramics layer of electrical heating element has strong combination, anti-thermal shock, do not ftracture; The use temperature of electrical heating element can reach 300-2900 DEG C, electric conversion rate up to 95%, more than 5 years effective service life; There is wide wave spectrum section compound and protectiveness (protection against corrosion, wear-resistant and anti-Slagging); Manufacturing process does not change electrical heating element structure, is easy to implement; Safety, energy-saving and environmental protection.
Embodiment
Embodiment 1
Nano ceramics electrical heating element is manufactured according to following steps:
1) carry out sandblasting to Sa2.5-3.0 standard at electrical heating element surface quartz sand, surfaceness 10 μm, removes surface and oil contaminant with alkaline cleaner, blows clean the fine particle of remained on surface after drying with pressurized air;
2) take 61wt% base-material (by accounting for that base-material total weight percent is the aluminum oxide of 10%, the boron nitride of 40% and 50% silicon carbide form), the butyl of 5wt% nano-cerium oxide, 15wt% potassium silicate solution, 2.1wt% wilkinite and 16.9wt%, be mixed with suspension, stir, obtain composite nano-ceramic slurry;
3) select suitable Air spraying spray gun, adopt the pressurized air of 0.6MPa, at electrical heating element surface spraying composite nano-ceramic slurry, spray-coated film thickness is 0.03mm;
4) gained nano ceramics electrical heating element normal temperature places 36h dry solidification, and the moisture on electrical heating element surface can be made to evaporate;
Nano ceramics electrical heating element in use heats up naturally, and composite nano-ceramic slurry sinters pottery into.
Embodiment 2
Nano ceramics electrical heating element is manufactured according to following steps:
1) carry out sandblasting to Sa2.5-3.0 standard at electrical heating element surface garnet, surfaceness 25 μm, removes surface and oil contaminant with alkaline cleaner, blows clean the fine particle of remained on surface after drying with pressurized air;
2) take 69wt% base-material (by accounting for that base-material total weight percent is the aluminum oxide of 50%, the boron nitride of 40% and 10% silicon carbide form), the alcohol of 10wt% nano-cerium oxide, 15wt% aluminum phosphate solution, 2.5wt% kaolin and 3.5wt%, be mixed with suspension, stir, obtain composite nano-ceramic material slurry;
3) select suitable Air spraying spray gun, adopt the pressurized air of 0.8MPa, at electrical heating element surface spraying composite nano-ceramic slurry, spray-coated film thickness is 0.06mm;
4) gained nano ceramics electrical heating element carries out dry solidification at 90 DEG C of thermostatically heating 4h;
Nano ceramics electrical heating element in use heats up naturally, and composite nano-ceramic slurry sinters pottery into.
Embodiment 3
Nano ceramics electrical heating element is manufactured according to following steps:
1) carry out sandblasting to Sa2.5-3.0 standard at electrical heating element surface quartz sand, surfaceness 15 μm, removes surface and oil contaminant with alkaline cleaner, blows clean the fine particle of remained on surface after drying with pressurized air;
2) take 65wt% base-material (by accounting for that base-material total weight percent is the aluminum oxide of 20%, the boron nitride of 60% and 20% silicon carbide form), the 5.7wt% water of 7wt% nano-cerium oxide, 20wt% potassium silicate solution, 2.3wt% wilkinite and surplus, be mixed with suspension, stir, obtain composite nano-ceramic slurry;
3) select suitable Air spraying spray gun, adopt the pressurized air of 0.7MPa, at electrical heating element surface spraying composite nano-ceramic slurry, spray-coated film thickness is 0.05mm;
4) gained nano ceramics electrical heating element normal temperature places 48h dry solidification, and the moisture on electrical heating element surface can be made to evaporate;
Nano ceramics electrical heating element in use heats up naturally, and composite nano-ceramic slurry sinters pottery into.
Embodiment 4
Nano ceramics electrical heating element is manufactured according to following steps:
1) carry out sandblasting to Sa2.5-3.0 standard at electrical heating element surface garnet, surfaceness 20 μm, removes surface and oil contaminant with alkaline cleaner, blows clean the fine particle of remained on surface after drying with pressurized air;
2) take 64wt% base-material (by accounting for that base-material total weight percent is the aluminum oxide of 30%, the boron nitride of 50% and 20% silicon carbide form), the butyl of 8wt% nano-cerium oxide, 16wt% aluminum phosphate solution, 2.2wt% kaolin and 9.8wt%, be mixed with suspension, stir, obtain composite nano-ceramic slurry;
3) select suitable Air spraying spray gun, adopt the pressurized air of 0.7MPa, at electrical heating element surface spraying composite nano-ceramic slurry, spray-coated film thickness is 0.04mm;
4) gained nano ceramics electrical heating element carries out dry solidification at 80 DEG C of thermostatically heating 2h;
Nano ceramics electrical heating element in use heats up naturally, and composite nano-ceramic slurry sinters pottery into.
Embodiment 5
The electrical heating element manufacture embodiment 1-4 and commercially available G080080030 electrical heating element carry out performance test, and correlated results is in table 1.
Table 1 electrical heating element the performance test results
As shown in Table 1, the performance of the nano ceramics electrical heating element of embodiment 1-4 is better than common commercially available prod comprehensively, and its electric heating transformation efficiency is higher, can resistance to 2900 DEG C of high temperature, and the life-span is longer.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly belongs to those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (8)
1. a nano ceramics electrical heating element, comprises electrical heating element and ceramic surface, it is characterized in that, described ceramic surface is a kind of composite nano-ceramic material, and this material is made up of the raw material of following weight percent:
Surplus is solvent;
Wherein, described base-material by accounting for that base-material total weight percent is the aluminum oxide of 10%-50%, the silicon carbide of the boron nitride of 40%-60% and 10%-50% forms.
2. nano ceramics electrical heating element according to claim 1, is characterized in that, described stablizer is wilkinite or kaolin.
3. nano ceramics electrical heating element according to claim 1, is characterized in that, described solvent is selected from one or more of butyl, alcohol and water.
4. nano ceramics electrical heating element according to claim 1, is characterized in that, described tackiness agent is potassium silicate solution or aluminum phosphate solution.
5. manufacture the method for nano ceramics electrical heating element according to claim 1, it is characterized in that, comprise the steps:
1) carry out sandblasting on electrical heating element surface, remove surface and oil contaminant, the fine particle that dry after-blow clean surface is residual;
2) take base-material, nano-cerium oxide, tackiness agent, stablizer and solvent, be mixed with suspension, stir, obtain composite nano-ceramic slurry;
3) at electrical heating element surface spraying composite nano-ceramic slurry;
4) gained nano ceramics electrical heating element carries out dry solidification.
6. the method for manufacture nano ceramics electrical heating element according to claim 5, it is characterized in that, described step 1) be specially: carry out sandblasting at electrical heating element surface quartz sand or garnet, surfaceness is 10-25 μm, remove surface and oil contaminant with alkaline cleaner, after drying, blow clean the fine particle of remained on surface with pressurized air.
7. the method for manufacture nano ceramics electrical heating element according to claim 5, it is characterized in that, described step 3) be specially: select Air spraying spray gun, adopt the pressurized air of 0.6-0.8MPa, at electrical heating element surface spraying composite nano-ceramic slurry, spray-coated film thickness is 0.03-0.06mm.
8. the method for manufacture nano ceramics electrical heating element according to claim 5, is characterized in that, described step 4) be specially: place 36-48h dry solidification or 80-90 DEG C of thermostatically heating 2-4h dry solidification under normal temperature.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108601110A (en) * | 2018-05-03 | 2018-09-28 | 杨诚龙 | Anti-thermal shock heating element |
| CN112858216A (en) * | 2021-02-05 | 2021-05-28 | 济南弗莱德科学仪器有限公司 | Rapid temperature control method for near-infrared spectrometer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86205234U (en) * | 1986-06-29 | 1987-10-03 | 王炳喧 | Miniature dual-filament electric stove with key switches |
| CN2686268Y (en) * | 2004-03-24 | 2005-03-16 | 尹维平 | Electric heating warming element |
| CN102584280A (en) * | 2012-01-18 | 2012-07-18 | 赵凯 | Nano ceramic coating with high emissivity |
| CN103436066A (en) * | 2012-04-13 | 2013-12-11 | 普罗旺斯科技（深圳）有限公司 | Heat dissipation coating, heat dissipation fin and manufacturing method |
-
2015
- 2015-04-29 CN CN201510214325.4A patent/CN104876553A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86205234U (en) * | 1986-06-29 | 1987-10-03 | 王炳喧 | Miniature dual-filament electric stove with key switches |
| CN2686268Y (en) * | 2004-03-24 | 2005-03-16 | 尹维平 | Electric heating warming element |
| CN102584280A (en) * | 2012-01-18 | 2012-07-18 | 赵凯 | Nano ceramic coating with high emissivity |
| CN103436066A (en) * | 2012-04-13 | 2013-12-11 | 普罗旺斯科技（深圳）有限公司 | Heat dissipation coating, heat dissipation fin and manufacturing method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108601110A (en) * | 2018-05-03 | 2018-09-28 | 杨诚龙 | Anti-thermal shock heating element |
| CN112858216A (en) * | 2021-02-05 | 2021-05-28 | 济南弗莱德科学仪器有限公司 | Rapid temperature control method for near-infrared spectrometer |
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Application publication date: 20150902 |