CN107651967A - A kind of sintering method of minor diameter PTC disks - Google Patents
A kind of sintering method of minor diameter PTC disks Download PDFInfo
- Publication number
- CN107651967A CN107651967A CN201710726958.2A CN201710726958A CN107651967A CN 107651967 A CN107651967 A CN 107651967A CN 201710726958 A CN201710726958 A CN 201710726958A CN 107651967 A CN107651967 A CN 107651967A
- Authority
- CN
- China
- Prior art keywords
- ptc
- blank
- zirconium powder
- minor diameter
- sintering method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/658—Atmosphere during thermal treatment
- C04B2235/6587—Influencing the atmosphere by vaporising a solid material, e.g. by using a burying of sacrificial powder
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Powder Metallurgy (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention belongs to process for electroceramics field, and in particular to a kind of sintering method of minor diameter PTC disks, this method comprise the following steps that：1) zirconium powder is uniformly perfused in the bottom of combustion pot；2) the spreading PTC blank to be sintered on above-mentioned zirconium powder；3) zirconium powder, zirconium powder parcel PTC blank outer surface are laid in PTC blank；4) combustion pot is put into tunnel cave and be sintered.The granularity of the zirconium powder is 60~200 mesh.The thickness of the zirconium powder of combustion pot bottom described in step 1) is 1~3mm.The thickness of the zirconium powder in PTC blank described in step 3) is 1~3mm.The PTC blank is placed on the zirconium powder of combustion pot bottom in the way of individual layer is placed.There is gap between PTC blank and PTC blank described in step 2).The sintering method of minor diameter PTC disks provided by the invention, the amount of labour and sintering temperature of chip process can be effectively reduced, reduce the generation of adhesion piece, it is possible to increase production efficiency, realize the production in enormous quantities of minor diameter PTC disks.
Description
Technical field
The invention belongs to process for electroceramics field, and in particular to a kind of sintering method of minor diameter PTC disks.
Background technology
PTC (positive temperature coefficient) disk is widely used in constant temperature heating, starter, overflowing device, has in PTC disks
A part of product design blank size≤10mm, in the art, generally this part blank diameter≤10mm PTC disks are claimed
For minor diameter PTC disks；In traditional sintering process, the ＇ of minor diameter PTC blank 2 is both needed to put in the ＇ of combustion pot 1 before sintering
Zirconium angle is put, then by the ＇ block pattern row patterns of minor diameter PTC blank 2 on the ＇ of zirconium angle 3, anti-sticking powder is sprinkled between blank and blank, is prevented
The ＇ adhesions of sintering process medium-small diameter PTC blank 2, as shown in Figure 2.Because the diameter of minor diameter PTC disks is smaller, it is difficult to by hand
Code, and man-hour needed for chip process is more.When blank diameter is less thanWhen, the action that blank is put into zirconium angle also needs
To be operated by tweezers, the action that piece is put into zirconium angle also needs to operate by tweezers, and task difficulty is big, and easily causes base
The breakage of piece, production efficiency and the qualification rate of product are had a strong impact on, and because its diameter is smaller, be not easy to spread zirconium powder, easily produced viscous
The bad order such as company and locus coeruleus.In traditional sintering method, blank directly contacts with air, and element outward appearance and performance are easily by outer
The influence of boundary's environment, positioned at the blank for burning diverse location in alms bowl, the resistance difference after sintering is larger, and resistance is relatively scattered.
Relatively low (the Tc@2*R25 of the general Curie temperature of minor diameter PTC disks<200 DEG C), sintering temperature height (conventional sintering technique
High-temperature region temperature is more than 1290 DEG C), adhesion piece is easily produced in sintering process.
The content of the invention
In order to overcome above-mentioned problems of the prior art, it is an object of the invention to provide a kind of minor diameter PTC disks
Sintering method, can reduce the chip process amount of labour and sintering temperature, reduce the generation of adhesion piece, it is possible to increase production effect
Rate, realize that minor diameter PTC disks are produced in enormous quantities.
To achieve these goals, the present invention provides a kind of sintering method of minor diameter PTC disks, the specific step of this method
It is rapid as follows：
1) zirconium powder is uniformly perfused in the bottom of combustion pot；
2) the spreading PTC blank to be sintered on above-mentioned zirconium powder；
3) zirconium powder, zirconium powder parcel PTC blank outer surface are laid in PTC blank；
4) combustion pot is put into tunnel cave and be sintered.
Preferably, the granularity of the zirconium powder is 60~200 mesh.
Preferably, the thickness of the zirconium powder of combustion pot bottom described in step 1) is 1~3mm.
Preferably, the thickness of the zirconium powder on PTC blank described in step 3) is 1~3mm.
Preferably, the PTC blank is placed on the zirconium powder of combustion pot bottom in the way of individual layer is placed.
Preferably, there is gap between the PTC blank and PTC blank described in step 2).
Compared with prior art, the invention has the advantages that：
The sintering method of minor diameter PTC disks provided by the invention, can effectively reduce chip process the amount of labour and
Sintering temperature, reduce the generation of adhesion piece, it is possible to increase production efficiency, realize the production in enormous quantities of minor diameter PTC disks.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram that minor diameter PTC blank provided in an embodiment of the present invention is put in combustion pot；
Fig. 2 is the schematic diagram that the minor diameter PTC blank that background technology provides is put in combustion pot；
In figure：1st, combustion pot, 2, PTC blank, 3, zirconium powder.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained all other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of sintering method of minor diameter PTC disks, and this method comprises the following steps that：1) exist
The bottom of combustion pot uniformly perfuses zirconium powder；2) the spreading PTC blank to be sintered on above-mentioned zirconium powder；3) laid in PTC blank
Zirconium powder, zirconium powder parcel PTC blank outer surface；4) combustion pot is put into tunnel cave and be sintered.Minor diameter provided by the invention
PTC disk sintering methods be by the direct spreading of PTC blank to be sintered on the zirconium powder of combustion pot bottom, it is and equal again on its surface
Even perfuses certain thickness zirconium powder, makes zirconium powder parcel PTC blank outer surface, it is not necessary to zirconium angle is put in combustion pot, also not
Need manually to effectively reduce the amount of labour of chip process, production effect can be effectively improved PTC blank block pattern row patterns
Rate, realize the production in enormous quantities of minor diameter PTC disks.
If Fig. 1 is the schematic diagram that minor diameter PTC blank provided in an embodiment of the present invention is put in combustion pot.The present invention's
The outer surface of sintering method medium-small diameter PTC blank is enclosed with zirconium powder, and PTC blank is not direct and air contact, element it is outer
See and performance is influenceed smaller by external environment, the resistance difference after sintering is smaller, and resistance value ratio is relatively concentrated.
Preferably, the granularity of zirconium powder is 60~200 mesh.When the granularity of zirconium powder is more than 200 mesh, zirconium powder is meticulous, required
Cost can increase；When the granularity of zirconium powder is less than 60 mesh, zirconium powder is excessively thick, is not easy to sprinkle even when being sprinkling upon between blank, causes to burn
PTC blank easily bonds together during knot；Therefore the granularity of zirconium powder can reduce the generation of adhesion piece between 60~200 mesh,
It is again cost-effective.
Preferably, the thickness of the zirconium powder of combustion pot bottom is 1~3mm in step 1)；The thickness of zirconium powder in step 3) blank
Spend for 1~3mm.When the thickness of zirconium powder is less than 1mm, it is impossible to ensure required atmosphere during PTC blank sintering, around blank
Heat is fugitive；When the thickness of zirconium powder is more than 3mm, the resistance after PTC blank sintering can be more dispersed；And thickness is 1-3mm's
Zirconium powder can both ensure the atmosphere needed for PTC blank sintering, also not interfere with the resistance after PTC blank sintering.
Preferably, PTC blank is placed on the zirconium powder of combustion pot bottom in the way of individual layer is placed, and can effectively be reduced
The quantity of adhesion piece.Sintering method provided by the invention substantially reduces compared with the adhesion piece quantity of conventional sintering method, by general low
3% or so ratio of Curie temperature minor diameter disk, which drops to almost, does not have adhesion piece.
Preferably, there is gap between the PTC blank and PTC blank in step 2)；Because PTC blank is located on zirconium powder, then
Zirconium powder is perfused in PTC blank it is ensured that bonding die will not occur for adjacent PTC blank, while can also avoid PTC blank portion
Directly contacted with air, reduce the influence that external environment sinters to PTC blank.
To reach close resistance, the sintering using the sintering method of minor diameter PTC disks provided in an embodiment of the present invention is high
The sintering high temperature area temperature of sintering method of the warm area temperature than being put using traditional zirconium corner brace is low 10-20 DEG C, reduces sintering temperature
Degree, save electric energy；In the case where tunnel cave rotating speed is constant, i.e., rotating speed is identical and when being 25Hz, sintering method of the invention with
Sintering temperature of traditional sintering method in each stage sets as shown in table 1.
The sintering temperature (DEG C) that the sintering method of the present invention of table 1 is set with traditional sintering method in each stage
It is such as acquisition target resistance 600-1000 Ω double high-temperature temperatures and rotating speed：It is double high using the sintering method of the present invention
1295/1295 DEG C of temperature, rotating speed 25Hz；Using double 1310/1310 DEG C of the high temperature of conventional sintering method, rotating speed 25Hz.Compared to traditional
Sintering method, sintering method provided by the invention, high-temperature region temperature reduce 15 DEG C, have saved electric energy.
By taking the production of electric mosquito repellent heating plate as an example：It is required that surface temperature Ts180 (± 10 DEG C, 220VAC, emissivity ε=
0.86), 7 ± 0.2mm* of diameter phi thickness, 2.2 ± 0.05mm, room temperature resistance R25 (500-3500 Ω), pressure-resistant Vb >=500VAC,
3min is without bad.
PTC blank diameter phi 8.2mm thickness 2.8mm are molded, burn alms bowl internal diameter 220*220mm.
By taking a combustion pot as an example, provide the present invention to minor diameter PTC disks sintering method and use zirconium corner brace with traditional
The sintering method put is compared, and single combustion pot can load the piece number of PTC blank, the unit interval can fill for having of mainly comparing
Dimensions and electrical property after the piece number of PTC blank, the double high-temperature temperatures and rotating speed that reach target resistance 600-1000 Ω, sintering
Comparison and the adhesion piece ratio of Board Lot.
1) single combustion pot can load the piece number of PTC blank：It can be loaded using the single combustion pot of sintering method of the present invention
The piece number of PTC blank is 670；The single combustion pot of sintering method put using traditional zirconium corner brace can load the piece of PTC blank
Number is 1170；
2) unit interval can fill the piece number of PTC blank：Using 1 hour piece that can fill PTC blank of sintering method of the present invention
Number is 50000；The piece number that the sintering method put using traditional zirconium corner brace can fill PTC blank in 1 hour is 5500；
3) target resistance 600-1000 Ω double high-temperature temperatures and rotating speed are reached：Using the double high temperature of the sintering method of the present invention
1295/1295 DEG C, rotating speed 25Hz；Double 1310/1310 DEG C of the high temperature of sintering method put using traditional zirconium corner brace, rotating speed 25Hz；
15 DEG C are reduced using the sintering method high-temperature region temperature of the present invention, has saved electric energy.
4) dimensions compares with electrical property after sintering
From table 2 it can be seen that the performance phase of the PTC pieces after sintering obtained by the sintering method put with traditional zirconium corner brace
Than slightly higher using the resistance value and dash current value of the PTC pieces after the sintering obtained by the sintering method of the present invention, PTC pieces are straight
Footpath, thickness and surface temperature are more or less the same.Therefore, sintering method provided by the invention is compared with the chip obtained by conventional sintering method
Size is with electrical property without significant difference.
The sintering method of the present invention of table 2 compares with dimensions after the sintering of traditional sintering method with electrical property
* thickness is ceramics thickness after sintering herein, and final finished also needs to be ground plane, silver-colored after cleaning, drying
Thickness after the completion of burning infiltration.
5) the adhesion piece ratio of Board Lot：Exemplified by producing 100,000 products, using the sintering method adhesion of the present invention
Piece only has 27, and the sintering method adhesion piece put using traditional zirconium corner brace has 2712.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (7)
1. a kind of sintering method of minor diameter PTC disks, it is characterised in that this method comprises the following steps：
1) zirconium powder is uniformly perfused in the bottom of combustion pot；
2) the spreading PTC blank to be sintered on above-mentioned zirconium powder；
3) zirconium powder, zirconium powder parcel PTC blank outer surface are laid in PTC blank；
4) combustion pot is put into tunnel cave and be sintered.
A kind of 2. sintering method of minor diameter PTC disks as claimed in claim 1, it is characterised in that：The granularity of the zirconium powder
For 60~200 mesh.
A kind of 3. sintering method of minor diameter PTC disks as claimed in claim 1, it is characterised in that：Held described in step 1)
The thickness for burning the zirconium powder of alms bowl bottom is 1~3mm.
A kind of 4. sintering method of minor diameter PTC disks as claimed in claim 1, it is characterised in that：PTC described in step 3)
The thickness of zirconium powder in blank is 1~3mm.
A kind of 5. sintering method of minor diameter PTC disks as claimed in claim 1, it is characterised in that：The PTC blank according to
The mode that individual layer is placed is placed on the zirconium powder of combustion pot bottom.
A kind of 6. sintering method of minor diameter PTC disks as claimed in claim 1, it is characterised in that：Described in step 2)
There is gap between PTC blank and PTC blank.
A kind of 7. electric mosquito repellent heating plate, it is characterised in that：The electric mosquito repellent heating plate is using any one of claim 1-6 institute
Prepared by the sintering method for the minor diameter PTC disks stated, when rotating speed is 25Hz, it is 1295/1295 DEG C to sinter double high-temperature temperatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710726958.2A CN107651967A (en) | 2017-08-23 | 2017-08-23 | A kind of sintering method of minor diameter PTC disks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710726958.2A CN107651967A (en) | 2017-08-23 | 2017-08-23 | A kind of sintering method of minor diameter PTC disks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107651967A true CN107651967A (en) | 2018-02-02 |
Family
ID=61128411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710726958.2A Pending CN107651967A (en) | 2017-08-23 | 2017-08-23 | A kind of sintering method of minor diameter PTC disks |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107651967A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118673A (en) * | 2015-09-09 | 2015-12-02 | 福建火炬电子科技股份有限公司 | Chip ceramic capacitor sintering method |
-
2017
- 2017-08-23 CN CN201710726958.2A patent/CN107651967A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118673A (en) * | 2015-09-09 | 2015-12-02 | 福建火炬电子科技股份有限公司 | Chip ceramic capacitor sintering method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107747080B (en) | Radar and infrared compatible stealth coating capable of resisting temperature of 600 ℃ and preparation method thereof | |
| CN101462876B (en) | Preparation of zirconia ceramic beaverboard | |
| CN103171207B (en) | Heat sink material and preparation method thereof | |
| CN101222794B (en) | Production method of glass-ceramics heating plate | |
| CN104529458B (en) | The manufacture method of high-performance SiC ceramic based composites blade of aviation engine | |
| CN102248166A (en) | Electrode preparation process for depositing diamond abrasive tool with electric sparks | |
| CN104261801A (en) | Ceramic bearing platter for microwave oven and preparation method of ceramic bearing platter | |
| CN106313287A (en) | Multifunctional ceramic tile and manufacturing method thereof | |
| CN101665350A (en) | Ceramic microwave absorbing material and preparation method and application thereof | |
| CN103102155A (en) | Buried type electric heating ceramic of far infrared heater and preparation method thereof | |
| CN107651967A (en) | A kind of sintering method of minor diameter PTC disks | |
| CN105472792A (en) | PTC thermal sensitive ceramic heating sheet manufacturing technology | |
| CN105016734B (en) | The preparation method of the infrared heat rejection microsphere of hollow gradient | |
| CN105428035B (en) | A kind of electronic component and its manufacture method | |
| CN105732016A (en) | Heat-resistant ceramic pot and preparation method thereof | |
| CN202218430U (en) | Rare earth thick film circuit heating element based on IR-LED ceramics substrate | |
| CN104575670A (en) | Resistance paste of substrate thick film circuit and preparation method of resistance paste | |
| CN105622130B (en) | The method for quickly preparing silicasol case | |
| CN103360075A (en) | Preparation method of aluminum nitride composite material and substrate prepared from aluminum nitride composite material | |
| WO2020114245A1 (en) | Hardware heat treatment equipment having high heat efficiency | |
| CN107011704B (en) | A kind of microwave heating coating | |
| CN2195745Y (en) | Strong radiative transfer energy-saving industral furnace | |
| CN107124777A (en) | A kind of temperature controllable carbon crystal heating board | |
| CN110128826A (en) | A kind of thermal-conductivity phase-change composite and preparation method thereof | |
| CN108264344A (en) | A kind of nanocrystalline barium titanate barium thermal sensitive ceramics and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180202 |