CN1127976A - Medium temp. electrothermal ceramic film - Google Patents
Medium temp. electrothermal ceramic film Download PDFInfo
- Publication number
- CN1127976A CN1127976A CN 94119049 CN94119049A CN1127976A CN 1127976 A CN1127976 A CN 1127976A CN 94119049 CN94119049 CN 94119049 CN 94119049 A CN94119049 A CN 94119049A CN 1127976 A CN1127976 A CN 1127976A
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- radiant heating
- electric radiant
- heating film
- oxide
- boron
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Abstract
The middle-temp electrothermal ceramic film is made up of Mo-containing Cd-Al-B glass material and reducer through coating the surface of electrically insulating refractory substrate by brushing, spraying, immersion coating, or silk screen print with the mixture of said materials and organic adhesive, baking and sintering at 750-850 deg.C for 5-30 min, and features high heating power and stably working surface temp over 300 deg.C.
Description
The invention belongs to the technical field of electric heating material.
Electric heating membrane calandria is because it is in light weight and be attached directly on the heated object surface, have heating rapidly, high, safe, energy-conservation, long-life of the heat efficiency etc. obviously is better than the characteristics of resistance wire calandria, obtained using widely.
Electric radiant Heating Film is divided into two kinds of metal semiconductor type and ceramic moulds usually, and the semi-conductor type Electric radiant Heating Film as SnO 2 thin film, indium oxide film etc., needs to adopt the vacuum coater, complex process, and equipment investment is big, and thicknesses of layers is wayward.The ceramic mould Electric radiant Heating Film is made of frit and conductive filler usually, makes ceramic glaze plasma membrane layer through high-temperature roasting technology, and its technology is simple, and equipment investment is little, is convenient to produce in batches, uses more extensive.
Present domestic the use generally with the ceramic mould Electric radiant Heating Film of graphite as conductive filler; its stable working temperature only reaches about 200 ℃; its heating power density and service condition have been limited thus; make the product of making to bear the high temperature of the frying barbecue of heating oils; can not bear vessel in burning; thereby the shape of product and kind are restricted greatly, bring inconvenience also for safeguard protection, cleaning and the maintenance of product.
The objective of the invention is to adopt ripe thick film ceramic technology, make heating temp and be higher than 250 ℃ medium temperature ceramics type Electric radiant Heating Film.
Electric radiant Heating Film of the present invention is that the shape of ground can be arbitrarily attached to above the heat-resisting ground of surface insulation, and its material can be glass, enamel, pottery and through materials such as the pretreated metals of insulation.
The main component of Electric radiant Heating Film is: contain the Cadmium-aluminium-boron frit and the reducing agent of molybdenum, the primary raw material that wherein contains the Cadmium-aluminium-boron frit of molybdenum is: molybdenum trioxide 5～20mol%, aluminium oxide 5-15mol%, boron oxide 40-60mol%, cadmium oxide 30-50mol%.The method for making of frit is that above-mentioned four kinds of raw materials are prepared burden in proportion, ball milling, and after mixing, fusion under 1000-1100 ℃ of temperature, hardening crack is levigate then, crosses 250 mesh sieves, makes the glass powder that contains molybdenum.
The reducing agent that adds certain content in the above-mentioned Cadmium-aluminium-boron glass powder that contains molybdenum mixes, and reducing agent is a silica flour, the boron powder, and molybdenum silicide powder can be with wherein one or more mix and use.Its addition is 1～20wt%.
The organic bond that adds certain content in above-mentioned mixed material is made the Electric radiant Heating Film slurry, and the composition of organic bond is glycerine, propylene glycol, terpinol, ethyl cellulose, nitrocellulose etc., can also can mix use only with wherein a kind of.Its addition is 20～60wt%.
Adopt methods such as brushing, spraying, dip-coating or silk screen printing that above-mentioned Electric radiant Heating Film slurry is coated on the surface of ground, through 100～200 ℃, after the oven dry in 10～30 minutes, use general industry muffle furnace or tunnel cave under air atmosphere, under 750-850 ℃ of temperature, be incubated 5-30 minute, make the ceramic mould Electric radiant Heating Film of compact structure.At high temperature the molybdenum trioxide in the raw material is reduced the molybdenum dioxide that agent is reduced into conductivity, recrystallization takes place in vitreum and crystallization grows into three-dimensional conductive network, and the Electric radiant Heating Film of making thus can be born very high heating power density.
The Electric radiant Heating Film that adopts the present invention to make, under the energising heating state, its long-term work temperature can reach 300 ℃ of power densities under the burning situation can reach 5～8W/cm
2, the temperature coefficient of resistance of Electric radiant Heating Film can be adjusted in-5 * 10 by changing prescription
-3/ ℃～+ 1 * 10
-3/ ℃ between.This Electric radiant Heating Film manufacturing process is simple, and equipment investment is few, and performance is controlled easily, is convenient to produce in enormous quantities.Use this Electric radiant Heating Film to make can to fry in shallow oil, explode, burn, roasting new electrically heating cooker, also can be used to make various infant industries and instrument and meter electric heating appliance, have very application prospects.
One embodiment of the present of invention are as follows:
With molybdenum trioxide, aluminium oxide, boron oxide, cadmium oxide was by 1: 1: 4: 4 mole proportioning mixes, pack into the porcelain crucible in muffle furnace in 1100 ℃ of fusions, the water crack of quenching then, cross 300 mesh sieves behind the ball milling and make glass dust, add the silica flour of 5wt% and an amount of again by terpinol, the organic bond that ethyl cellulose constitutes is mixed and made into the Electric radiant Heating Film slurry, method with silk screen printing is coated in it on aluminum oxide substrate, through 100 ℃, dried by the fire in 20 minutes in after, with muffle furnace in atmosphere in 800 ℃ of sintering 15 minutes, make Electric radiant Heating Film, this Electric radiant Heating Film under the burning condition, can be born 8W/cm in air
2Power density, surface temperature steady in a long-term is at 300～350 ℃.
Claims (5)
1, a kind of medium temperature ceramics Electric radiant Heating Film is characterized in that its main material composition is Cadmium-aluminium-boron frit and the reducing agent that contains molybdenum, and its stable working temperature reaches 300 ℃.
2,, it is characterized in that the described Cadmium-aluminium-boron frit that contains molybdenum is made of following ingredients according to the described Electric radiant Heating Film of claim l:
Molybdenum oxide 5～20mol%
Aluminium oxide 5～15mol%
Boron oxide 40～60mol%
Cadmium oxide 30～50mol%
3, according to the described Electric radiant Heating Film of claim l, it is characterized in that described reducing agent is boron powder, silica flour, molybdenum silicide powder, can be only with wherein one or more mix use.
4, according to the described Electric radiant Heating Film of claim l, the preparation technology who it is characterized in that Electric radiant Heating Film is: adopt organic bond and electrothermal film material to be mixed and made into slurry, with brushing, spraying, dip-coating or method for printing screen it is coated on surface insulation and the heat-resisting ground, after the drying, in 5～30 minutes film forming of 750～850 ℃ of temperature sintering.
5, Electric radiant Heating Film according to claim 1 is characterized in that above-mentioned organic bond is glycerine, propylene glycol, terpinol, ethyl cellulose, nitrocellulose, and only use is wherein a kind of, also can mix use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94119049 CN1127976A (en) | 1994-12-27 | 1994-12-27 | Medium temp. electrothermal ceramic film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94119049 CN1127976A (en) | 1994-12-27 | 1994-12-27 | Medium temp. electrothermal ceramic film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1127976A true CN1127976A (en) | 1996-07-31 |
Family
ID=5039089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94119049 Pending CN1127976A (en) | 1994-12-27 | 1994-12-27 | Medium temp. electrothermal ceramic film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1127976A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102065588A (en) * | 2010-11-15 | 2011-05-18 | 中山市格普斯纳米电热科技有限公司 | Ceramic heating plate and manufacturing method thereof |
| CN101374990B (en) * | 2006-01-31 | 2011-09-14 | 塞拉亚,恩帕兰萨及加尔多斯国际私人控股公司 | Iron sole and iron containing same |
| CN104058597A (en) * | 2014-05-23 | 2014-09-24 | 中山市新纪元电器有限公司 | Screen printing sintering process method of electrothermal film |
| CN106686771A (en) * | 2016-02-03 | 2017-05-17 | 黄伟聪 | Thick film element with covering layer with high heat conduction capability |
| CN106686770A (en) * | 2016-02-03 | 2017-05-17 | 黄伟聪 | Thick film element with coating substrate with high heat conduction capability |
-
1994
- 1994-12-27 CN CN 94119049 patent/CN1127976A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101374990B (en) * | 2006-01-31 | 2011-09-14 | 塞拉亚,恩帕兰萨及加尔多斯国际私人控股公司 | Iron sole and iron containing same |
| CN102065588A (en) * | 2010-11-15 | 2011-05-18 | 中山市格普斯纳米电热科技有限公司 | Ceramic heating plate and manufacturing method thereof |
| CN104058597A (en) * | 2014-05-23 | 2014-09-24 | 中山市新纪元电器有限公司 | Screen printing sintering process method of electrothermal film |
| CN106686771A (en) * | 2016-02-03 | 2017-05-17 | 黄伟聪 | Thick film element with covering layer with high heat conduction capability |
| CN106686770A (en) * | 2016-02-03 | 2017-05-17 | 黄伟聪 | Thick film element with coating substrate with high heat conduction capability |
| CN106686771B (en) * | 2016-02-03 | 2019-09-06 | 黄伟聪 | A kind of coating has the thick film element of high thermal conductivity ability |
| CN106686770B (en) * | 2016-02-03 | 2019-09-10 | 黄伟聪 | A kind of coating substrate has the thick film element of high thermal conductivity ability |
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Addressee: Sangpu Energy-saving Tech. Co., Ltd., Shenzhen Document name: Deemed a waiver of a patent claim |
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| C20 | Patent right or utility model deemed to be abandoned or is abandoned |