CN204306820U - A kind of silver/silver chloride powder electrode - Google Patents
A kind of silver/silver chloride powder electrode Download PDFInfo
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- CN204306820U CN204306820U CN201420666298.5U CN201420666298U CN204306820U CN 204306820 U CN204306820 U CN 204306820U CN 201420666298 U CN201420666298 U CN 201420666298U CN 204306820 U CN204306820 U CN 204306820U
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Abstract
This utility model is a kind of silver/silver chloride powder electrode, this electrode mainly uses as biosensor at medical instruments field, use as reference electrode in electrochemical field, it comprises silver/silver chloride material, insulant, filamentary silver, solder joint, circular hole, wire.Filamentary silver is fixed on silver/silver chloride material, and filamentary silver is formed solder joint together with wire bonds, uses insulant embedding, between electrode material and insulant, leaves circular hole.This utility model also relates to the preparation of silver/silver chloride material.The beneficial effects of the utility model are: 1, electrode is not easy polarization; 2, vesicular texture, makes arbitrary electrode layer surface performance identical.
Description
Technical field
The present invention is a kind of silver/silver chloride powder electrode, and this electrode mainly uses as biosensor at medical instruments field, uses as reference electrode in electrochemical field.
Background technology
Along with the development of science and technology, electroencephalogram, electrocardiogram, ERPs(event related potential) there is develop rapidly.
As the sensor gathering bioelectrical signals, there is tin electrode, silver/silver chloride non-polarizable electrode.
Tin electrode, as acquisition electrode, has following deficiency: 1, tin electrode material is softer, hard not; Fusing point is lower, is difficult to welding after broken string.
2, when gathering bioelectrical signals, having weak current and passing through, thus causing polarization of electrode.Classical silver/silver chloride non-polarizable electrode plates one deck silver chloride on the basis of silver electrode.
But also there is following inconvenience:
1, coating easily comes off, and uses and just needs several times again to electroplate, waste time and energy.
2, after coating wearing and tearing, easily make electrode performance unstable.
Together with argentum powder is dispersed in uniformly with chlorination argentum powder in a kind of silver/silver chloride powder electrode, considerably increase the contact area of argentum powder and chlorination argentum powder.Relative to silver/silver chloride non-polarizable electrode, it has significant advantage:
1, in silver/silver chloride powder electrode, cation and anion, flow to opposite polarity electrode, accumulation can not occur, and electrode is not easy polarization.
2, silver/silver chloride material is a kind of powder, can be uniformly distributed, form vesicular texture after machine-shaping.The performance of each electrode layer surface is identical.
In electrochemical field, as the silver/silver chloride electrode of reference electrode, used solid state process preparation in the past, need solid abrasive to become micron-sized granule, the operating time is long.
Use Liquid preparation methods silver/silver chloride powder.Response speed is fast, uses equipment simple, convenient operation.
Domestic patent (CN101084829A) related to the present invention, is dispersed in silver nitrate aqueous solution by argentum powder in this patent, then adds in chloride aqueous solution, obtains argentum powder and silver chloride mixed-powder.This method prepares silver/silver chloride powder, is unfavorable for silver/silver chloride particle precipitation.Manufacturing process does not use ultrasonic grinding, and obtained silver/silver chloride powder particle is larger.
Summary of the invention
For achieving the above object, technical scheme of the present invention is: it comprises silver/silver chloride material, insulant, filamentary silver, solder joint, circular hole, wire; Filamentary silver is fixed on silver/silver chloride material, and filamentary silver is formed solder joint together with wire bonds, uses insulant embedding; Circular hole is left between electrode material and insulant.
Preferably: silver/silver chloride powder electrode is homodisperse loose structure.
Preferably: wire is isolated with filamentary silver pad and silver/silver chloride material.
Preferably: wire, filamentary silver and solder joint are potted in insulating barrier.
The invention still further relates to the preparation of silver/silver chloride material, its step is as follows:
(1) 4.8gAgNo is taken
3(analytical pure) is dissolved in 500ml ultra-pure water, stirs (2) take 8gNaCl(analytical pure with blender) be dissolved in 400ml ultra-pure water, slowly pour the AgNO under stirring into
3in solution, first time pour 100ml into, second time pour 100ml into, third time pour 200ml into, excessive 2 ~ 5 times of NaCl, be more conducive to silver chloride powder precipitation (3) and outwell water layer, with 500ml ultra-pure water repeated washing repeatedly (4) get the supernatant, use AgNO
3solution titration, sees if there is muddiness, cleans, until use AgNO if any muddiness continuation ultra-pure water
3during solution titration, there is no muddiness, this generates after 4g silver chloride (AgCl) (5) have been cleaned and add 500ml ultra-pure water, the AgCl suspension of rapid stirring put into by the argentum powder that rapid stirring AgCl suspension (6) takes 32g200 order (74 microns), Ag powder and AgCl mix homogeneously, now Ag powder: AgCl powder mass ratio is 8:1(7) leave standstill after mix homogeneously, until there is no float, outwell water, mixture thing is placed in soft solid self-sealing plastic bag, then the ultrasonic instrument being placed on 3000HZ carries out Ultrasonic Pulverization, work 10 minutes, reactant is placed in drying baker by the larger particles (8) pulverizing reaction species dries, temperature can not higher than 80 DEG C (9) by filamentary silver, powder is placed in mould, be 500Kg/cm with pressure
2powder to 300 ~ 450 DEG C, is put into by the electrode (10) that press machine is pressed into arbitrary shape by oven heat, and heating 30 minutes (11) whole operating process needs to carry out (12) in darkroom with electrical property test instrument, the performance of detecting electrode
Beneficial effect of the present invention is:
At medical instruments field as the sensor gathering bioelectrical signals, its beneficial effect is:
1, in silver/silver chloride powder electrode, cation and anion, flow to opposite polarity electrode, accumulation can not occur, and electrode is not easy polarization.。
2, silver/silver chloride material is a kind of powder, can be uniformly distributed, and forms vesicular texture after processing aftershaping.The performance of each electrode layer surface is identical.。
In electrochemical field, its beneficial effect is:
Liquid preparation methods silver/silver chloride material response speed is fast, and equipment is simple, convenient operation.
Accompanying drawing explanation
A kind of silver/silver chloride powder electrode structure chart of Fig. 1 the present invention
A pair silver medal/silver chloride powder electrode is placed in 0.9%NaCl solution by Fig. 2, with the DC offset voltage change of electrical property test instrument test electrode in 12 hours.
1-silver/silver chloride material, 2-insulant, 3-filamentary silver, 4-solder joint, 5-circular hole, 6-wire in figure.
Specific embodiments
Below in conjunction with example, the present invention is further described.
A kind of silver/silver chloride powder electrode, is characterized in that: it comprises silver/silver chloride material 1, insulant 2, filamentary silver 3, solder joint 4, circular hole 5, wire 6; Filamentary silver 3 is fixed on electrode material 1, filamentary silver 3 and wire 6 is welded together to form solder joint 4, with insulant 2 embedding, leaves circular hole 5 between electrode material 1 and insulant 2.
Filamentary silver, together with wire bonds, forms solder joint.Between solder joint and silver/silver chloride material, be coated with one deck insulant, play buffer action, to prevent solder joint and silver/silver chloride material generation displacement reaction, corrosion silver/silver chloride material.
With insulant embedding filamentary silver, silver/silver chloride material, solder joint and wire.Place it in after embedding in drying baker, temperature is adjusted to 60 DEG C, and drying time 30 minutes, until insulant solidifies completely.
The invention still further relates to the preparation of silver/silver chloride material, its step is as follows:
(1) 4.8gAgNo is taken
3(analytical pure) is dissolved in 500ml ultra-pure water, stirs (2) take 8gNaCl(analytical pure with blender) be dissolved in 400ml ultra-pure water, slowly pour the AgNO under stirring into
3in solution, first time pour 100ml into, second time pour 100ml into, third time pour 200ml into, excessive 2 ~ 5 times of NaCl, be more conducive to silver chloride powder precipitation (3) and outwell water layer, with 500ml ultra-pure water repeated washing repeatedly (4) get the supernatant, use AgNO
3solution titration, sees if there is muddiness, cleans, until use AgNO if any muddiness continuation ultra-pure water
3during solution titration, there is no muddiness, this generates after 4g silver chloride (AgCl) (5) have been cleaned and add 500ml ultra-pure water, the AgCl suspension of rapid stirring put into by the argentum powder that rapid stirring AgCl suspension (6) takes 32g200 order (74 microns), Ag powder and AgCl mix homogeneously, now Ag powder: AgCl powder mass ratio is 8:1(7) leave standstill after mix homogeneously, until there is no float, outwell water, mixture thing is placed in soft solid self-sealing plastic bag, then the ultrasonic instrument being placed on 3000HZ carries out Ultrasonic Pulverization, work 10 minutes, reactant is placed in drying baker by the larger particles (8) pulverizing reaction species dries, temperature can not higher than 80 DEG C (9) by filamentary silver, powder is placed in mould, be 500Kg/cm with pressure
2powder to 300 ~ 450 DEG C, is put into by the electrode (10) that press machine is pressed into arbitrary shape by oven heat, and heating 30 minutes (11) whole operating process needs to carry out (12) in darkroom with electrical property test instrument, the performance of detecting electrode
In (2) step, NaCl(analytical pure) solution slowly pours AgNO into
3in solution, in case generate large AgCl granule.
In (3) step, there is following chemical reaction:
AgNO3+NaCl=AgCl↓+NaNO3
The obtained AgCl microgranule of this kind of method is little, and response speed is fast.
In (4) step, there is following chemical reaction:
Ag
++Cl
-==AgCl↓
If have muddiness in reaction, illustrate in solution still have unnecessary Cl
-, need continue use ultra-pure water cleaning, until with AgNO3 titration time, without muddiness.
Claims (4)
1. silver/silver chloride powder electrode, is characterized in that: it comprises silver/silver chloride material (1), insulant (2), filamentary silver (3), solder joint (4), circular hole (5), wire (6); Filamentary silver (3) is fixed on silver/silver chloride material (1), and filamentary silver (3) and wire (6) are welded together to form solder joint (4), with insulant (2) embedding; Circular hole (5) is left between electrode material and insulant.
2. according to a kind of silver/silver chloride powder electrode according to claim 1, it is characterized in that: silver/silver chloride powder electrode is homodisperse loose structure.
3. according to a kind of silver/silver chloride powder electrode according to claim 1, it is characterized in that: solder joint and the silver/silver chloride material of wire and filamentary silver are isolated.
4., according to a kind of silver/silver chloride powder electrode according to claim 1, it is characterized in that: wire, filamentary silver and solder joint are potted in insulant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420666298.5U CN204306820U (en) | 2014-11-10 | 2014-11-10 | A kind of silver/silver chloride powder electrode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420666298.5U CN204306820U (en) | 2014-11-10 | 2014-11-10 | A kind of silver/silver chloride powder electrode |
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| CN204306820U true CN204306820U (en) | 2015-05-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104287714A (en) * | 2014-11-10 | 2015-01-21 | 青岛柏恩鸿泰电子科技有限公司 | Silver/ silver chloride powder electrode |
| CN109310355A (en) * | 2016-06-30 | 2019-02-05 | 拓自达电线株式会社 | Electrode material |
| US11490846B2 (en) | 2016-06-30 | 2022-11-08 | Tatsuta Electric Wire & Cable Co., Ltd. | Bioelectrode and method for producing bioelectrode |
-
2014
- 2014-11-10 CN CN201420666298.5U patent/CN204306820U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104287714A (en) * | 2014-11-10 | 2015-01-21 | 青岛柏恩鸿泰电子科技有限公司 | Silver/ silver chloride powder electrode |
| CN109310355A (en) * | 2016-06-30 | 2019-02-05 | 拓自达电线株式会社 | Electrode material |
| CN109310355B (en) * | 2016-06-30 | 2022-03-22 | 拓自达电线株式会社 | Electrode material |
| US11490846B2 (en) | 2016-06-30 | 2022-11-08 | Tatsuta Electric Wire & Cable Co., Ltd. | Bioelectrode and method for producing bioelectrode |
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