CN100474983C - Method for fabricating electric-heating film PTC heating devices - Google Patents
Method for fabricating electric-heating film PTC heating devices Download PDFInfo
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- CN100474983C CN100474983C CNB2004100153342A CN200410015334A CN100474983C CN 100474983 C CN100474983 C CN 100474983C CN B2004100153342 A CNB2004100153342 A CN B2004100153342A CN 200410015334 A CN200410015334 A CN 200410015334A CN 100474983 C CN100474983 C CN 100474983C
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Abstract
This invention relates to electric heating film PTC device process method, which is characterized by comprising the following steps: adopting streamline shaped ceramic green compact as upper ceramic base board and down ceramic base board by use of materials of alumina and aluminium nitride; electric heating film plasm wire net printing, heat rolling and glue drainage with temperature of 60-120 DEG C and pressure of 50-300kg.cm-2,sintering and connection with temperature of 1500-1700 DEG C ; wherein the said plasm is made of tungsten powder or molybdenum and manganese powder of 90%-99% with glass powder of 1%-10% by their proportion of 10:1-1:1.
Description
Technical field:
The present invention relates to a kind of manufacture method of Electric radiant Heating Film PTC heater spare, it belongs to a kind of manufacture method of electric heating device.
Background technology:
At present, the electrothermal film heater spare of making of metal, semiconductor or other composite materials in the prior art is of a great variety.In these electrothermal film heater spares, important composition part Electric radiant Heating Film wherein is because the defective of processing technology, the main problem that exists is that temperature can not be from limit, the energising back is under additional not external temperature control equipment situation, temperature can continue to be elevated to more than 700 degree, use safety inadequately, can not stablize lasting work simultaneously.There is potential safety hazard in the failure phenomenon that particularly is short-circuited easily under oxidizing atmosphere or wet environment." a kind of manufacture method of novel heating original paper " disclosed in No. the 03114238.9th, the Chinese patent, a kind of manufacture method of making electrothermal film heater is provided in this technical scheme, the electrothermal film heater that this method is made, because what adopt in this method is the technical scheme that the ceramic post sintering auxiliary agent bonds together ceramic wafer, therefore, combination under the electrothermal film heater that the manufactures state at high temperature between the ceramic wafer can be easy to destroyed, can not work lastingly, failure phenomenon easily is short-circuited under oxidizing atmosphere or wet environment.
Summary of the invention:
The object of the present invention is to provide a kind of good seal performance, the bond strength height can be worked lastingly, the manufacture method of safe and reliable Electric radiant Heating Film PTC heater spare.
The object of the present invention is achieved like this:
A kind of manufacture method of Electric radiant Heating Film PTC heater spare is characterized in that it comprises following processing step:
A: select to adopt with aluminium oxide or aluminium nitride be ceramic green behind the raw material flow casting molding as ceramic substrate, ceramic substrate divides goes up ceramic substrate and following ceramic substrate;
B: Electric radiant Heating Film slip silk screen printing
Add the raw material of glass powder as Electric radiant Heating Film in tungsten powder, wherein tungsten powder is 90%～99%, and glass powder is 1%～10%, goes into adhesive with the mixed of 10: 1～1:1 then and makes the Electric radiant Heating Film slip; Adopt the mode of contact printing to be printed on down on the ceramic substrate green compact in the Electric radiant Heating Film slurry; 150～400 order silk screens are adopted in printing; And from Electric radiant Heating Film, draw the identical electrode of material simultaneously.
C: hot pressing
Last ceramic substrate green compact and the following ceramic substrate green compact that printed the Electric radiant Heating Film slurry are accurately carried out hot pressing behind the location, and hot pressing temperature is generally 60～120 ℃, and pressure is 50～300kgcm
-2
D: binder removal
Ceramic green after the hot pressing is put into the stove binder removal, and programming rate is per hour 20 ℃～50 ℃, be raised to 250 ℃～650 ℃ after, be incubated 2～6 hours;
E: sintering
Ceramic green behind the binder removal is put into the stove sintering, and 1500～1700 ℃ of sintering temperatures become as a whole with upper and lower ceramic substrate green sintering.
F: connect
On electrode, connect lead, be connected by soldering, seal silver paste or the method for electroplating the back sintering between lead and the electrode.
Described glass powder is the mixed powder that comprises aluminium oxide, calcium oxide, magnesium oxide, silica, yittrium oxide, and described adhesive is to comprise the contract adhesive of butyl ester, O-phthalic ester dibutyl ester, n-butanol, trichloroethylene, tetrachloro-ethylene, ethanol, nitroglycerine composition of polyvinyl alcohol.
The ceramic green surfacing of flow casting molding, thickness is at 0.2～2.0mm.
The described ceramic substrate of going up leaves two or more breach, and gap position is over against the electrode leads to client of following ceramic substrate;
Described ceramic substrate and the following ceramic substrate gone up is characterized in that described ceramic substrate is the slab construction of different shape.
Described as last ceramic substrate and following ceramic substrate raw material aluminium oxide or aluminium nitride at content behind the sintering more than 90%.
The Electric radiant Heating Film live width that is printed on down on the ceramic substrate is 0.2～2mm, the spacing 0.2～5mm between line and the line.
The described Electric radiant Heating Film line that is printed on down on the ceramic substrate is the continuous lines that equally spaced pectination is arranged.
The described Electric radiant Heating Film line that is printed on down on the ceramic substrate is the continuous lines that density pectination is at interval arranged.
The described Electric radiant Heating Film line that is printed on down on the ceramic substrate is the continuous lines that concentric circles is arranged.
Described electrode of drawing from Electric radiant Heating Film can be two or more.
Described lead adopts nickel wire or copper cash.
Another implementation of the present invention:
A: at first select to adopt with the aluminium nitride be ceramic green behind the raw material flow casting molding as ceramic substrate, described ceramic substrate comprises ceramic substrate and following ceramic substrate; Described ceramic green is as the raw material of last ceramic substrate and following ceramic substrate, employed aluminium nitride requirement behind sintering content 94%; The ceramic substrate green compact are circular slab construction, leave two breach on last ceramic substrate, and gap position is over against the following exit of the electrode of ceramic substrate, the surfacing of described ceramic substrate green compact, and thickness is 1.0mm;
B: Electric radiant Heating Film slip silk screen printing: in the silk screen printing of described Electric radiant Heating Film slip, select 50%～90% molybdenum manganese mixed powder as the Electric radiant Heating Film raw material, add 10%～50% glass powder, mix with adhesive with the ratio of 10:1-1:1 then; The described Electric radiant Heating Film line 8 that is printed on down on the ceramic substrate is continuous lines of arranging with parallel concentric circles, and Electric radiant Heating Film 8 live widths are 0.9mm; 250 order silk screens are adopted in printing;
C: hot pressing: the following ceramic substrate green compact that will go up the ceramic substrate green compact and print the Electric radiant Heating Film slurry accurately carry out hot pressing behind the location, and hot pressing temperature is generally 120 ℃, and pressure is 300kgcm
-2
D: binder removal: the ceramic green after the hot pressing is put into the stove binder removal, and programming rate is per hour 50 ℃, after 650 ℃, is incubated 5 hours;
E: sintering: the ceramic green behind the binder removal is put into the stove sintering, and 1500 ℃ of sintering temperatures become as a whole with upper and lower ceramic substrate green sintering;
The molybdenum powder in described molybdenum manganese mixed powder and the ratio of manganese powder are 9:1-3:1.
Technological process of the present invention is simple, has solved in the prior art the easy ruined defective of the combination between the ceramic wafer under the existing state at high temperature.The Electric radiant Heating Film PTC heater spare good seal performance of utilizing the present invention to manufacture, the bond strength height can be worked lastingly, and is safe and reliable.
Description of drawings:
Accompanying drawing 1 is one of the wiring form of Electric radiant Heating Film on the ceramic substrate under the present invention
Accompanying drawing 2 is the structural representation of ceramic substrate in the present invention
Accompanying drawing 3 is two of the wiring form of Electric radiant Heating Film on the ceramic substrate under the present invention
Accompanying drawing 4 is two of the structural representation of ceramic substrate in the present invention
Accompanying drawing 5 is three of the wiring form of Electric radiant Heating Film on the ceramic substrate under the present invention
Accompanying drawing 6 is three of the structural representation of ceramic substrate in the present invention
Embodiment:
Embodiment 1:
At first utilize the green compact casting technique to make the ceramic substrate green compact: in the aluminium oxide ceramics powder, add suitable adhesive, as the employed aluminium oxide requirement of last ceramic substrate and following ceramic substrate raw material behind sintering content 96%.Form highly viscous slurry through behind the ball mill mixing.With the thickness of the scraper control cast layer that is positioned at the conveyer belt top, certain thickness slurry just was evenly distributed on the carrier band when conveyer belt moved.After oven dry under 100 ℃ of temperature, can be standby.This technology is prior art.The surfacing of described ceramic substrate green compact, thickness are 0.8mm.As shown in attached Fig. 1 and 2, ceramic substrate green compact in the present embodiment are rectangle structure, leave three breach 6 or leave two breach at last ceramic substrate 4, gap position can expose electrode leads to client over against the exit of the electrode 2 of following ceramic substrate 3 after upper and lower ceramic substrate sinters integral body into.As shown in accompanying drawing 2 and accompanying drawing 4.
The silk screen printing of Electric radiant Heating Film slip:
At first make the Electric radiant Heating Film slip: in tungsten powder, add the raw material of glass powder as Electric radiant Heating Film, wherein tungsten powder is 95%, and glass powder is 5%, is mixed into adhesive then in raw material, the raw material of Electric radiant Heating Film and the ratio of adhesive are 2:1, make the Electric radiant Heating Film slip.Described glass powder is the mixed powder that comprises aluminium oxide, calcium oxide, magnesium oxide, silica, yittrium oxide, described adhesive be comprise polyvinyl alcohol contract butyl ester, O-phthalic ester dibutyl ester, n-butanol, trichloroethylene, tetrachloro-ethylene, ethanol, nitroglycerine composition solvent type adhesive or add water-soluble binder.Glass powder and adhesive constitute prior art.
Adopt the mode of contact printing to be printed on down on the ceramic substrate green compact in the Electric radiant Heating Film slurry then; 300 order silk screens are adopted in printing; And from Electric radiant Heating Film, draw the identical electrode of material simultaneously.Electric radiant Heating Film 5 live widths that are printed on down on the ceramic substrate are 0.5mm, the spacing 2mm between line and the line.The described Electric radiant Heating Film line 5 that is printed on down on the ceramic substrate 3 is continuous lines that equally spaced pectination is arranged, as shown in accompanying drawing 1, or the continuous lines 7 of density pectination arrangement at interval, as shown in accompanying drawing 3.From Electric radiant Heating Film, draw the identical electrode of material 2 simultaneously.The electrode of drawing from Electric radiant Heating Film can be three, as shown in accompanying drawing 1, includes zero line and live wire.The electrode of drawing from Electric radiant Heating Film can be two, as shown in accompanying drawing 3
Hot pressing: the following ceramic substrate green compact that will go up the ceramic substrate green compact and print the electric heating slurry accurately carry out hot pressing behind the location, and hot pressing temperature is generally 100 ℃, and pressure is 100kgcm
-2
Binder removal: the ceramic substrate green compact after the hot pressing are put into the stove binder removal, and programming rate is per hour 30 ℃, be raised to 600 ℃ after, be incubated 2 hours.
Sintering: the ceramic green behind the binder removal is put into the stove sintering, and 1600 ℃ of sintering temperatures become as a whole with upper and lower ceramic substrate green sintering.
Connect: connect lead 1 on electrode, the method by sintering after soldering, seal silver paste or the plating between lead 1 and the electrode 2 is connected.Described lead can adopt nickel wire or copper cash high temperature wire.
The Electric radiant Heating Film PTC heater spare that uses above-mentioned technology to make has ptc characteristics, and promptly when temperature raise, its resistance can increase.
Embodiment 2:
At first select to adopt with the aluminium nitride be ceramic green behind the raw material flow casting molding as ceramic substrate, as last ceramic substrate and the employed aluminium nitride requirement of following ceramic substrate raw material behind sintering content 94%.Ceramic substrate green compact in the present embodiment are circular slab construction, leave two breach at last ceramic substrate 4, and gap position is over against the exit of the electrode 2 of following ceramic substrate 3, as shown in accompanying drawing 5 and accompanying drawing 6.The surfacing of described ceramic substrate green compact, thickness are 1.0mm
In the present embodiment, in the silk screen printing of described Electric radiant Heating Film slip, select 60% molybdenum manganese mixed powder, add 40% glass powder, mix with adhesive with the ratio of 4:1 then as the Electric radiant Heating Film raw material.The molybdenum powder in described molybdenum manganese mixed powder and the ratio of manganese powder are 5:1.The described Electric radiant Heating Film line 8 that is printed on down on the ceramic substrate is continuous lines of arranging with parallel concentric circles, and Electric radiant Heating Film 8 live widths are 0.9mm.250 order silk screens are adopted in printing.
Hot pressing: the following ceramic substrate green compact that will go up the ceramic substrate green compact and print the Electric radiant Heating Film slurry accurately carry out hot pressing behind the location, and hot pressing temperature is generally 120 ℃, and pressure is 300kgcm
-2
Binder removal: the ceramic green after the hot pressing is put into the stove binder removal, and programming rate is per hour 50 ℃, after 650 ℃, is incubated 5 hours.
Sintering: the ceramic green behind the binder removal is put into the stove sintering, and 1500 ℃ of sintering temperatures become as a whole with upper and lower ceramic substrate green sintering.
Other processing steps of present embodiment are identical with embodiment 1 with parameter.
Claims (13)
1, a kind of manufacture method of Electric radiant Heating Film PTC heater spare is characterized in that it comprises following processing step:
A: select to adopt with aluminium oxide or aluminium nitride be ceramic green behind the raw material flow casting molding as ceramic substrate, ceramic substrate comprises ceramic substrate and following ceramic substrate;
B: Electric radiant Heating Film slip silk screen printing
Add the raw material of glass powder as Electric radiant Heating Film in tungsten powder, wherein tungsten powder is 90%～99%, and glass powder is 1%～10%, goes into adhesive with the mixed of 10:1～1:1 then and makes the Electric radiant Heating Film slip; Adopt the mode of contact printing to be printed on down on the ceramic substrate green compact in the Electric radiant Heating Film slurry; 150～400 order silk screens are adopted in printing; And from Electric radiant Heating Film, draw the identical electrode of material simultaneously.
C: hot pressing
Last ceramic substrate green compact and the following ceramic substrate green compact that printed the Electric radiant Heating Film slurry are accurately carried out hot pressing behind the location, and hot pressing temperature is 60～120 ℃, and pressure is 50～300kgcm
-2
D: binder removal
Ceramic green after the hot pressing is put into the stove binder removal, and programming rate is per hour 20 ℃～50 ℃, be raised to 250 ℃～650 ℃ after, be incubated 2～6 hours;
E: sintering
Ceramic green behind the binder removal is put into the stove sintering, and 1500～1700 ℃ of sintering temperatures become as a whole with upper and lower ceramic substrate green sintering.
F: connect
On electrode, connect lead, be connected by soldering, seal silver paste or the method for electroplating the back sintering between lead and the electrode.
2, the manufacture method of the Electric radiant Heating Film PTC heater spare described in claim 1, it is characterized in that described glass powder is the mixed powder that comprises aluminium oxide, calcium oxide, magnesium oxide, silica, yittrium oxide, described adhesive is to comprise the contract adhesive of butyl ester, O-phthalic ester dibutyl ester, n-butanol, trichloroethylene, tetrachloro-ethylene, ethanol, nitroglycerine composition of polyvinyl alcohol.
3, the manufacture method of the Electric radiant Heating Film PTC heater spare described in claim 1 is characterized in that the ceramic green surfacing of flow casting molding, and thickness is at 0.2～2.0mm; The described ceramic substrate of going up leaves two or more breach, and gap position is over against the electrode leads to client of following ceramic substrate;
4, the manufacture method of the Electric radiant Heating Film PTC heater spare described in claim 3 is characterized in that the slab construction that described upward ceramic substrate and following ceramic substrate are different shape.
5, the manufacture method of the Electric radiant Heating Film PTC heater spare described in claim 1, it is characterized in that described as last ceramic substrate and following ceramic substrate raw material aluminium oxide or aluminium nitride behind sintering content 90%.
6, the manufacture method of the Electric radiant Heating Film PTC heater spare described in claim 1, the Electric radiant Heating Film live width that it is characterized in that being printed on down on the ceramic substrate is 0.2～2mm, the spacing 0.2～5mm between line and the line.
7, the manufacture method of the Electric radiant Heating Film PTC heater spare described in claim 6 is characterized in that the described Electric radiant Heating Film line that is printed on down on the ceramic substrate is the continuous lines that equally spaced pectination is arranged.
8, the manufacture method of the Electric radiant Heating Film PTC heater spare described in claim 6 is characterized in that the described Electric radiant Heating Film line that is printed on down on the ceramic substrate is the continuous lines that density pectination is at interval arranged.
9, the manufacture method of the Electric radiant Heating Film PTC heater spare described in claim 6 is characterized in that the described Electric radiant Heating Film line that is printed on down on the ceramic substrate is the continuous lines that concentric circles is arranged.
10, the manufacture method of the Electric radiant Heating Film PTC heater spare described in claim 1 is characterized in that described electrode of drawing can be two or more from Electric radiant Heating Film.
11, the manufacture method of the Electric radiant Heating Film PTC heater spare described in claim 1 is characterized in that described lead adopts nickel wire or copper cash.
12, a kind of manufacture method of Electric radiant Heating Film PTC heater spare is characterized in that:
A: at first select to adopt with the aluminium nitride be ceramic green behind the raw material flow casting molding as ceramic substrate, described ceramic substrate comprises ceramic substrate and following ceramic substrate; Described ceramic green is as the raw material of last ceramic substrate and following ceramic substrate, employed aluminium nitride requirement behind sintering content 94%; The ceramic substrate green compact are circular slab construction, leave two breach on last ceramic substrate, and gap position is over against the following exit of the electrode of ceramic substrate, the surfacing of described ceramic substrate green compact, and thickness is 1.0mm;
B: Electric radiant Heating Film slip silk screen printing: in the silk screen printing of described Electric radiant Heating Film slip, select 50%～90% molybdenum manganese mixed powder as the Electric radiant Heating Film raw material, add 10%～50% glass powder, mix with adhesive with the ratio of 10:1-1:1 then; The described Electric radiant Heating Film line that is printed on down on the ceramic substrate is the continuous lines of arranging with concentric circles, and the Electric radiant Heating Film live width is 0.9mm; 250 order silk screens are adopted in printing;
C: hot pressing: the following ceramic substrate green compact that will go up the ceramic substrate green compact and print the Electric radiant Heating Film slurry accurately carry out hot pressing behind the location, and hot pressing temperature is 120 ℃, and pressure is 300kgcm
-2
D: binder removal: the ceramic green after the hot pressing is put into the stove binder removal, and programming rate is per hour 50 ℃, after 650 ℃, is incubated 5 hours;
E: sintering: the ceramic green behind the binder removal is put into the stove sintering, and 1500 ℃ of sintering temperatures become as a whole with upper and lower ceramic substrate green sintering.
13, the manufacture method of the Electric radiant Heating Film PTC heater spare described in claim 12 is characterized in that the molybdenum powder in described molybdenum manganese mixed powder and the ratio of manganese powder are 9:1---3:1.
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| CNB2004100153342A CN100474983C (en) | 2004-02-13 | 2004-02-13 | Method for fabricating electric-heating film PTC heating devices |
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| CNB2004100153342A CN100474983C (en) | 2004-02-13 | 2004-02-13 | Method for fabricating electric-heating film PTC heating devices |
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| CN100474983C true CN100474983C (en) | 2009-04-01 |
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