CN101620900A - Method for increasing PTC thermistance yield by reducing resistance value - Google Patents
Method for increasing PTC thermistance yield by reducing resistance value Download PDFInfo
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- CN101620900A CN101620900A CN200910184084A CN200910184084A CN101620900A CN 101620900 A CN101620900 A CN 101620900A CN 200910184084 A CN200910184084 A CN 200910184084A CN 200910184084 A CN200910184084 A CN 200910184084A CN 101620900 A CN101620900 A CN 101620900A
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- ptc
- sintering
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- resistance value
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Abstract
The invention provides a method for increasing PTC thermistance yield by reducing a resistance value, comprising the following steps: 1. weighing raw materials of barium carbonate, calcium carbonate, titanium dioxide, silicon dioxide and strontium carbonate, mixing and rubbing, dehydrating and dry pressing to prepare a PTC polished section; 2. sintering: sintering the flaky PC polished section in a high-temperature furnace; 3. welding electrodes: inserting a lead into the PTC polished section so as to weld the electrodes on the PTC polished section and a pin in a tin furnace, and then detecting according to the resistance value; 4. welding and packaging to prepare finished products or assembling an outer housing, wherein in the sintering process in the step two, macromolecule materials and the PTC polished section are mixed and sintered in the high-temperature furnace, and then when the furnace temperature rises to 800-900 DEG C, the temperature is kept for 50-80 minutes, and the sintered products are taken out. The method can reduce the resistance value by 20-30 percent without influencing performance, thereby greatly increasing the yield.
Description
Technical field
The present invention relates to a kind of utilization and fall the method that resistance improves PTC thermistor rate of finished products, belong to manufacture field of electronic elements.
Background technology
PTC thermistor (Positive Temperature Coefficient) is the abbreviation of semistor, and when surpassing certain temperature (Curie temperature), its resistance value is along with the rising of temperature is increasing of step evolution.According to its material difference, can be divided into two kinds: ceramic PTC thermistor and organic polymer PTC thermistor.Can be used for aspects such as heated at constant temperature, low-voltage heating, air heat, overcurrent protection, temperature sensing, delayed startup, be a kind of senser that is widely used, is in great demand.
In the production process of PTC thermistor, owing in the PTC sintering process, not configuring or reason such as resistance dispersion can cause resistance greater than qualified product because of sintering curre, be defective item if resistance exceeds standard, had a strong impact on the rate of finished products of product, thereby influenced production efficiency.
Summary of the invention
The objective of the invention is to overcome above-mentioned technical problem, provide a kind of utilization to fall the method that resistance improves PTC thermistor rate of finished products, this method can reduce the resistance of PTC thermistor, improves rate of finished products greatly.
The method that resistance improves PTC thermistor rate of finished products falls in utilization of the present invention, may further comprise the steps:
1) weighing brium carbonate, calcium carbonate, titanium dioxide, silicon dioxide, strontium carbonate raw material mix the back and grind, and dehydrate the dry-pressing formed PTC of the making mating plate in back;
2) sintering: with sheet PTC mating plate sintering in high temperature furnace;
3) top electrode: the PTC mating plate is inserted lead-in wire, in the tin stove, realize the welding top electrode of PTC mating plate and pin, detect according to the resistance stepping;
4) welding is packaged into finished product or assembling shell;
Wherein, the 2nd) in the step sintering process, macromolecular material and PTC mating plate mixed to be placed on carry out sintering in the high temperature furnace, when furnace temperature rises to 800-900 ℃, be incubated taking-up in 50-80 minute.
Preferably, said macromolecular material is selected from one or more in polyethylene, polypropylene, the polystyrene.
Method of the present invention has following technique effect: the present invention can be under the situation that does not influence performance resistance decline 20-30%, improve rate of finished products greatly.
Embodiment
The present invention is further illustrated below in conjunction with embodiment, but the scope of protection of present invention is not limited to the scope that embodiment represents.
Embodiment 1
Method in the present embodiment may further comprise the steps:
1) weighing brium carbonate, calcium carbonate, titanium dioxide, silicon dioxide, strontium carbonate raw material mix the back and grind, and dehydrate the dry-pressing formed PTC of the making mating plate in back;
2) sintering: with sheet PTC mating plate sintering in high temperature furnace; Macromolecular material polyethylene and PTC mating plate mixed to be placed on carry out sintering in the high temperature furnace, when furnace temperature rises to 800 ℃, be incubated taking-up in 50 minutes;
3) top electrode: the PTC mating plate is inserted lead-in wire, in the tin stove, realize the welding top electrode of PTC mating plate and pin, detect according to the resistance stepping;
4) welding is packaged into finished product or assembling shell.
Embodiment 2
Method in the present embodiment may further comprise the steps:
1) weighing brium carbonate, calcium carbonate, titanium dioxide, silicon dioxide, strontium carbonate raw material mix the back and grind, and dehydrate the dry-pressing formed PTC of the making mating plate in back;
2) sintering: with sheet PTC mating plate sintering in high temperature furnace; Macromolecular material polypropylene and PTC mating plate mixed to be placed on carry out sintering in the high temperature furnace, when furnace temperature rises to 900 ℃, be incubated taking-up in 80 minutes;
3) top electrode: the PTC mating plate is inserted lead-in wire, in the tin stove, realize the welding top electrode of PTC mating plate and pin, detect according to the resistance stepping;
4) welding is packaged into finished product or assembling shell.
Embodiment 3
Method in the present embodiment may further comprise the steps:
1) weighing brium carbonate, calcium carbonate, titanium dioxide, silicon dioxide, strontium carbonate raw material mix the back and grind, and dehydrate the dry-pressing formed PTC of the making mating plate in back;
2) sintering: with sheet PTC mating plate sintering in high temperature furnace; Macromolecular material polypropylene, polystyrene and PTC mating plate mixed to be placed on carry out sintering in the high temperature furnace, when furnace temperature rises to 850 ℃, be incubated taking-up in 65 minutes;
3) top electrode: the PTC mating plate is inserted lead-in wire, in the tin stove, realize the welding top electrode of PTC mating plate and pin, detect according to the resistance stepping;
4) welding is packaged into finished product or assembling shell.
Claims (2)
1, utilize the method for falling resistance raising PTC thermistor rate of finished products, may further comprise the steps:
1) weighing brium carbonate, calcium carbonate, titanium dioxide, silicon dioxide, strontium carbonate raw material mix the back and grind, and dehydrate the dry-pressing formed PTC of the making mating plate in back;
2) sintering: with PTC mating plate sintering in high temperature furnace;
3) top electrode: the PTC mating plate is inserted lead-in wire, in the tin stove, realize the welding top electrode of PTC mating plate and pin, detect according to the resistance stepping;
4) welding is packaged into finished product or assembling shell;
It is characterized in that, the 2nd) in the step sintering process, macromolecular material and PTC mating plate mixed to be placed on carry out sintering in the high temperature furnace, when furnace temperature rises to 800-900 ℃, be incubated taking-up in 50-80 minute.
2, method according to claim 1 is characterized in that, said macromolecular material is selected from one or more in polyethylene, polypropylene, the polystyrene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910184084A CN101620900A (en) | 2009-08-13 | 2009-08-13 | Method for increasing PTC thermistance yield by reducing resistance value |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910184084A CN101620900A (en) | 2009-08-13 | 2009-08-13 | Method for increasing PTC thermistance yield by reducing resistance value |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101620900A true CN101620900A (en) | 2010-01-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910184084A Pending CN101620900A (en) | 2009-08-13 | 2009-08-13 | Method for increasing PTC thermistance yield by reducing resistance value |
Country Status (1)
| Country | Link |
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| CN (1) | CN101620900A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842397A (en) * | 2012-06-07 | 2012-12-26 | 西安电子科技大学 | Positive temperature coefficient thermistor resistance trimming method of barium titanate system |
| CN110246640A (en) * | 2019-06-04 | 2019-09-17 | 陕西华经微电子股份有限公司 | A kind of hurtless measure resistance value method for repairing and regulating |
-
2009
- 2009-08-13 CN CN200910184084A patent/CN101620900A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102842397A (en) * | 2012-06-07 | 2012-12-26 | 西安电子科技大学 | Positive temperature coefficient thermistor resistance trimming method of barium titanate system |
| CN102842397B (en) * | 2012-06-07 | 2015-11-11 | 西安电子科技大学 | Barium titanate series semistor resistance trimming method |
| CN110246640A (en) * | 2019-06-04 | 2019-09-17 | 陕西华经微电子股份有限公司 | A kind of hurtless measure resistance value method for repairing and regulating |
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Application publication date: 20100106 |