CN208795690U - A kind of Eh chemical sensor for high pressure hydrothermal system - Google Patents
A kind of Eh chemical sensor for high pressure hydrothermal system Download PDFInfo
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Abstract
The utility model discloses a kind of Eh chemical sensors for high pressure hydrothermal system, it is made of heat-sealable working electrode and external pressure-balancing type reference electrode, on the one hand by using nickel-base alloy pedestal in platinum working electrode, and by pedestal taper hole, high-temperature insulation cone pad, high-temperature insulation tapered sleeve, round table-like high-temperature insulation ceramic formed taper self-energized seal mechanism, on the other hand by by reference electrode install to high temperature pressure vessel on the cold-zone pipeline with capillary, and two pieces of porous ceramics are used in high temperature and pressure area and normal temperature high voltage area respectively, realize double salt bridges connection of reference electrode；The utility model is successfully realized the Eh value in situ measurement to the hydrothermal system of -700 DEG C of room temperature, -100 MPa of normal pressure, solves the problems, such as that the prior art cannot work in 400-700 DEG C, the thermal and hydric environment of 40-100 MPa.
Description
Technical field
The utility model relates to a kind of chemical sensors more particularly to one for high pressure hydrothermal system Eh value in situ measurement
Kind can be used for Eh value in situ measurement chemical sensor of high pressure hydrothermal system of wide temperature and pressure limit and preparation method thereof.
Background technique
The Eh value of high temperature and pressure hydrothermal system is most basic one of the physical-chemical parameters of system, be system it is a variety of oxidation and
Assemblage after reaching oxidation-reduction reaction balance between reduction components is as a result, the height of system Eh value reflects system on a macro scale
To the size of extraneous ingredients oxidation or reducing power.Therefore, the Eh value of in situ measurement high temperature and pressure hydrothermal system is high pressure hydro-thermal
One groundwork in science and technology field.
By the definition and international professional standard of Eh value, due to that can not make in the quasi- hydrogen electrode of high temperature and pressure hydrothermal condition subscript
With, at present both at home and abroad for the sensor of in situ measurement high temperature and pressure hydrothermal system Eh value usually by working electrode Pt electrode and
Ag/AgCl reference electrode composition, and the electromotive force value of two electrode obtained by situ measurement and by Ag/AgCl reference electrode
Current potential be converted into hydrogen scalar potential to obtain the Eh value of system.However, being used for the Pt of high temperature and pressure hydrothermal system in the world at present
Electrode and Ag/AgCl reference electrode, or due to existing defects in the designs such as electrode structure, shape and mounting means and do not conform to
Reason, or due to stability of the wire electrode in the high temperature and pressure hydrothermal system of higher temperature itself there are problem (including oxidation,
Hydrolysis and melting etc.), so that the Eh sensor maximum operation (service) temperature and pressure that are made of two electrode be difficult at present be more than simultaneously
400℃,40 MPa.For example, for platinum working electrode, if wire electrode takes heat seal mode, due to polytetrafluoroethylene (PTFE), fluorine
Thermal decomposition can occur at relatively high temperatures for the various sealing materials such as rubber, silica gel, epoxy resin, intensity is significantly reduced and even melted
The problems such as, so that its operating temperature and pressure be made to be difficult to simultaneously more than 400 DEG C, 40 MPa；If its wire electrode takes cold sealing
Mode then usually has biggish volume and its significant heat transfer effect because of entire electrode for high temperature pressure vessel
It answers, to considerably increase the temperature gradient in high temperature pressure vessel so that sample is unable to reach thermal balance, therefore causes at present
It is greatly limited in stability even reliability by cold seal formula platinum electrode measurement result obtained.For another example right
In Ag/AgCl reference electrode, since at relatively high temperatures (such as 300 DEG C or so) significant water occurs for the AgCl on wire electrode
Solution, Ag are aoxidized, if the problem of being reduced under conditions of relatively restoring there is also AgCl, thus it is existing built-in at present
Use temperature of the Ag/AgCl electrode in high temperature and pressure hydrothermal system is difficult to more than 300 DEG C；If using the external of salt-free bridge type
Formula Ag/AgCl reference electrode is then only suitable for the usually lower flow reactor of operating pressure, and there is the reference liquid being constantly pumped into
Pollution is led to the problem of to sample in high temperature pressure vessel and the streaming potential that generates in flow process of system is difficult to hold；
If using the external Ag/AgCl reference electrode of salt bridge type, due to being used as the porous ceramics quilt of salt bridge in such existing electrode
It is placed in high temperature and pressure area, and is needed between the porous ceramics in high temperature and pressure area and the container for containing interior reference liquid using poly- four
Vinyl fluoride " O " shape sealing ring prevents the sample solution in high temperature pressure vessel because siphonage enters interior reference liquid, and current
Even it can also be thermally decomposed top-quality polytetrafluoroethylene (PTFE) at 380 DEG C or so, therefore such Ag/AgCl reference electrode
Temperature that can be applicable is difficult to more than 400 DEG C.So that the formal report in relation in situ measurement high pressure hydrothermal system Eh value is difficult at present
To have while more than 400 DEG C, the data of 40 MPa.Rarely seen someone's report is by using cold seal formula platinum electrode and salt-free bridge type
It is the high-temperature high pressure water fluid system that 27.6 MPa, temperature are up to 465 DEG C that the combination of Ag/AgCl reference electrode, which obtains excess pressure,
Eh value (Digby D. Macdonald and Leo B. Kriksunov, Probing the chemical and
electrochemical properties of SCWO systems. Electrochimica Acta, 2001, 47:
775-790).
In view of the in situ measurement of Eh value in high pressure water science of heat with the critical importance in technology and at present in the world in height
The above-mentioned predicament faced in warm high pressure hydrothermal system Eh in situ measurement work is developed a kind of reliable and stable and can be applicable at higher temperature
The Eh chemical sensor for spending pressure hydrothermal system will be with particularly important meaning.
Utility model content
Technical problem to be solved by the utility model is: a kind of Eh chemical sensor for high pressure hydrothermal system is provided,
To solve the problems, such as that the prior art cannot be used for 400-700 DEG C, 40-100 MPa temperature, the high temperature and pressure hydrothermal system for pressing range.
The technical solution of the utility model is: a kind of Eh chemical sensor for high pressure hydrothermal system, including external
Pressure-balancing type reference electrode and heat-sealable working electrode, the working electrode lead and external pressure of heat-sealable working electrode are flat
The reference electrode lead of weighing apparatus type reference electrode is connect with the positive and negative anodes of digital multimeter respectively, and wherein external pressure-balancing type is joined
Include pedestal, round table-like porous ceramics and external thread column than electrode, be equipped with the first taper hole on the base, round table-like porous ceramics is logical
It crosses high-temperature insulation tapered sleeve to be mounted in the first taper hole, is equipped with external thread column with holes in the lower end surface of pedestal, the first taper hole
Bottom is connected to external thread column by an axially extending bore, and the external thread column has external screw thread in cold-zone by capillary
Pressure chamber body be connected, be equipped in pressure chamber body under mutually chimeric polytetrafluoroethylene (PTFE) upper holder block and polytetrafluoroethylene (PTFE)
Briquetting, polytetrafluoroethylene (PTFE) upper holder block and polytetrafluoroethylene (PTFE) lower lock block are fixed on pressure by upper clamping nut and lower clamping nut respectively
Power reservoir body both ends, polytetrafluoroethylene (PTFE) upper holder block bottom have cylindrical cavity, and polytetrafluoroethylene (PTFE) lower lock block upper end has corresponding
Cylindrical protrusions, in cylindrical protrusions be equipped with cavity, porous ceramics column is installed on the top of cavity, in the lower part of cavity
Filled with interior reference substance, capillary is mounted in the axis through-hole of polytetrafluoroethylene (PTFE) upper holder block, one end and porous ceramics column phase
Even, the other end extends outwardly and passes through clamping nut to be connected with external thread column, and reference electrode lead is installed under polytetrafluoroethylene (PTFE)
In the axis through-hole of briquetting, the upper end is connected with interior reference substance, and lower end extends outwardly and passes through lower clamping nut as reference electricity
Pole lead.
Upper end, the lower end of polytetrafluoroethylene (PTFE) lower lock block of the polytetrafluoroethylene (PTFE) upper holder block are tapered, upper clamping nut
It is the conical cavity to match with lower clamping nut corresponding position.
The heat-sealable working electrode is mainly by pedestal, round table-like high-temperature insulation cone pad, high-temperature insulation tapered sleeve, rotary table
Shape high-temperature insulation ceramics, inert metal piece, spongy inert metal layer and working electrode lead composition, are equipped on the base
Second taper hole, pedestal axially have through-hole and the bottom of second taper hole to be connected to, and there is round table-like high temperature resistant at the convergence end of the second taper hole
Insulation cone pad is equipped with high-temperature insulation tapered sleeve on round table-like high-temperature insulation cone pad, installs in high-temperature insulation tapered sleeve
There are round table-like high-temperature insulation ceramics, has spongy inert metal layer, small end face on round table-like high-temperature insulation ceramics large end face
On have inert metal piece, the working electrode lead below the second taper hole in through-hole pass through round table-like high-temperature insulation cone pad,
It is realized by inert metal piece and the working electrode lead in round table-like high-temperature insulation ceramics exhausted with round table-like high temperature resistant
The electric connection of spongy inert metal layer on edge ceramics end face.
It is Ag/AgCl wire electrode that the reference electrode lead, which is located at the part in interior reference substance, and rest part is Ag electricity
Pole lead.
The interior reference substance is KCl+AgCl+H2O or NaCl+AgCl+H2Saturation KCl or the NaCl solid-liquid of O
Mixture.
The material of the round table-like porous ceramics and porous ceramics column is porous aluminas or zirconia ceramics.
The high-temperature insulation tapered sleeve material is pyrophyllite, mica or boron nitride.
The material of the round table-like high-temperature insulation ceramics is corundum ceramic.
The working electrode lead and inert metal sheet material are Pt.
The beneficial effects of the utility model are: to the structure, shape and mounting means of this sensor electrode etc. institute
The design of the novelty of work and science is that the operating temperature that the utility model can be applicable in and pressure and stability and reliability are equal
Better than the basic guarantee of current all other technology.It specifically includes:
1, the external pressure-balancing type Ag/AgCl reference electrode used in the utility model, due in pressure chamber body
It is middle to use mutually chimeric polytetrafluoroethylene (PTFE) upper holder block and polytetrafluoroethylene (PTFE) lower lock block, and pass through upper clamping nut and lower compression
The fixed structure of nut can completely cut off pressure very well and hold inner cavity and external environment, reduce external environment to the reference electricity in pressure appearance
The influence of pole, while on the one hand can avoid existing built-in A g/AgCl reference electrode because oxidation of the Ag in aqueous fluid, AgCl exist
Hydrolysis and thermal decomposition in aqueous fluid is so that the problem of its operating temperature is difficult to more than 300 DEG C；On the other hand it also can avoid non-salt
Bridge type external pressure-balancing type Ag/AgCl reference electrode there are sample pollution, streaming potential, only adapt to current system and ask
Topic；Meanwhile can also solve salt bridge type external pressure-balancing type Ag/AgCl reference electrode because salt bridge external seal heatproof is limited so that
Its operating temperature is difficult to the problem of more than 400 DEG C.
2, the new type heat-sealable platinum working electrode in the utility model sensor, by pedestal taper hole, round table-like high temperature resistant
The taper self-energized seal mechanism that insulation cone pad, high-temperature insulation tapered sleeve and round table-like high-temperature insulation ceramics are constituted has very
Leakage efficiency well and the temperature and pressure that can at least bear 700 DEG C, 100 MPa simultaneously.Efficiently solve existing heat seal
Electrode operating temperature and pressure caused by declining in mode because of sealing material elevated-temperature seal performance are difficult to simultaneously more than 400 DEG C, 40
In MPa and cold sealing means because of the problem of stability caused by temperature gradient and poor reliability.Moreover, the utility model
It is in close contact between each building block in working electrode, with the good globality of one stage property of pedestal without being easily scattered and damaging, from
And utility model works electrode can be repeatedly used.
3, the external pressure-balancing type Ag/AgCl reference electrode used in the utility model is respectively arranged in hot-zone and cold-zone
One plot of porous ceramics salt bridge, on the one hand the design of double salt bridges has been effectively relieved experimental solutions and interior reference solution mutually pollutes
Problem；On the other hand, the porous ceramics salt bridge in high-temperature region also can effectively avoid high temperature fluid and capillary in high temperature and high pressure kettle
Thermal convection in managing between cryogen, improves the stability of fluid state in high temperature and high pressure kettle.
In short, by changing from structure and shape to working electrode in existing same type of sensor and a large amount of of reference electrode
Into a kind of chemical sensor for high temperature and pressure hydrothermal system Eh value in situ measurement of the utility model is on the one hand by sensor
Operating temperature and upper pressure limit have been increased to can reach 700 DEG C, 100MPa simultaneously, to overcome the work of existing same type of sensor
Make temperature and pressure cannot simultaneously more than 400 DEG C, 40 MPa the problem of；On the other hand, it is sensed with existing various high pressure hydro-thermal Eh
Device compares, and the stability and reliability of the utility model sensor are obviously improved.
Detailed description of the invention
Fig. 1 is that electrode base in the utility model, heat-sealable working electrode and the structure of the round table-like porous ceramics in hot-zone are shown
It is intended to；
Fig. 2 is the structural schematic diagram of external pressure-balancing type Ag/AgCl reference electrode cold-zone part in the utility model
Specific embodiment
With reference to the accompanying drawing and utility model is described further in specific embodiment:
1, the production and assembling of each components of the utility model heat-sealable working electrode.As shown in Figure 1, using high-temperature nickel-based
Alloy makes pedestal 7, and an end face of nickel-base alloy pedestal 7 is bored there are two taper hole, there are through-hole and cone in another end face along axial direction
Hole connection；Round table-like high-temperature insulation cone pad 5 and high-temperature insulation tapered sleeve 2 are made using pyrophyllite, and pyrophyllite is round table-like
There is through-hole in 5 axle center of high-temperature insulation cone pad；Working electrode lead 6 and round table-like high-temperature insulation ceramics 1 are made using platinum
Spongy inert metal layer 3 on big disc is the electrochemistry sensitizing range of entire electrode, is through brushing-sintering process production
It forms；Corundum ceramic is selected to make round table-like high-temperature insulation ceramics 1, axle center platinum working electrode lead 6 and ceramic body
It is formed through slip casting method is integral sintered；The round table-like high-temperature insulation of taper hole, pyrophyllite on nickel-base alloy pedestal 7 bores pad 5, pyrophyllite
The angle of release of high-temperature insulation tapered sleeve 2 and round table-like high-temperature insulation ceramics 1 is 15o.Each components of heat-sealable working electrode
Assembling includes the following steps:
Step 1: the axis through-hole by working electrode lead 6 along the round table-like high-temperature insulation cone pad 5 of pyrophyllite is pierced by.
Step 2: the round table-like high-temperature insulation cone pad 5 of the pyrophyllite for being installed with working electrode lead 6 is pressed into nickel-base alloy base
The convergence end of larger taper hole on seat 7, wherein the small disc of the small disc of pyrophyllite round table-like high-temperature insulation cone pad 5 and taper hole it
Between retain a fixed gap.
Step 3: it is put into pyrophyllite high-temperature insulation tapered sleeve 2 in the larger taper hole of nickel-base alloy pedestal 7, and in pyrophyllite
The suitable inert metal piece 4 of thickness is placed on the big disc of round table-like high-temperature insulation cone pad 5.
Step 4: being pressed on big disc in pyrophyllite high-temperature insulation tapered sleeve 2 with hydraulic jack has spongy inertia
Metal layer 3, axle center have the round table-like high-temperature insulation ceramics 1 of working electrode lead 6, measure spongy inert metal layer 3 with from
The resistance between working electrode lead 6 being pierced by 7 axially extending bore of nickel-base alloy pedestal confirms that the electrical connectivity of the two is good.
So far, heat-sealable working electrode each components are completed.
2, the production and assembling of each components of the utility model external pressure-balancing type Ag/AgCl reference electrode.Such as Fig. 1
With shown in Fig. 2, round table-like porous ceramics 8 is mounted in another taper hole on pedestal 7 by high-temperature insulation tapered sleeve 2, in pedestal 7
Lower end surface be equipped with external thread column 9 with holes, the bottom of taper hole is connected to external thread column 9 by an axially extending bore, external thread column 9
With in cold-zone there is externally threaded pressure chamber body 15 to be connected by capillary 10, phase is installed in pressure chamber body 15
Mutually chimeric polytetrafluoroethylene (PTFE) upper holder block 12 and polytetrafluoroethylene (PTFE) lower lock block 18, polytetrafluoroethylene (PTFE) upper holder block 12 pass through upper compression spiral shell
Cap 11 and upper polytetrafluoroethylene (PTFE) gasket ring 13 are fixed on 15 upper end of pressure chamber body, and polytetrafluoroethylene (PTFE) lower lock block 18 passes through lower compression spiral shell
Cap 20 and lower polytetrafluoroethylene (PTFE) gasket ring 19 are fixed on 15 bottom end of pressure chamber body, and 12 bottom of polytetrafluoroethylene (PTFE) upper holder block has cylinder
Shape cavity, 18 upper end of polytetrafluoroethylene (PTFE) lower lock block have corresponding cylindrical protrusions, cavity are equipped in cylindrical protrusions, in chamber
The top of body is equipped with porous ceramics column 14, and under-filled in cavity has interior reference substance 17, and capillary 10 is mounted on polytetrafluoro
In the axis through-hole of ethylene upper holder block 12, one end is connected with porous ceramics column 14, and the other end extends outwardly and passes through compression
Nut 11 is connected with external thread column 19, and reference electrode lead 22 is installed in the axis through-hole 21 of polytetrafluoroethylene (PTFE) lower lock block 20,
Upper end is connected with interior reference substance 17, and lower end extends outwardly and passes through lower clamping nut 20 as contact conductor.
Pressure chamber body 15, upper clamping nut 11, lower clamping nut 20 and capillary 10 are processed into using nickel-base alloy,
Wherein 15 outer surface of pressure chamber body is threaded, and upper clamping nut 11,20 threaded top of lower clamping nut are 90 ° of cone structures；
It is 90 ° of cone cell protrusions at the top of polytetrafluoroethylene (PTFE) upper holder block 12, there is a cylindrical cavity in lower end；18 upper end of polytetrafluoroethylene (PTFE) lower lock block
Have a cylindrical bump, inside have one compared with roundlet cylindrical cavity, bottom is 90 ° of cone cell protrusions；Interior 17 system of reference substance by KCl+
AgCl + H2O(be chemistry it is pure) constitute saturation KCl solid-liquid mixtures；Reference electrode lead 22 is located in interior reference substance 17
Part be Ag/AgCl wire electrode, it is that same root Ag is made through being electrolysed that rest part, which is Ag contact conductor, the two
Collectively form the utility model reference electrode silk.The assembling of each components of external pressure-balancing type reference electrode includes following step
It is rapid:
Step 1: the reference electrode lead 22 that by upper end be Ag/AgCl wire electrode, lower end is Ag contact conductors is from poly-
18 axis through-hole 21 of tetrafluoroethene lower lock block is pierced by, later by polytetrafluoroethylene (PTFE) lower lock block 18, lower polytetrafluoroethylene (PTFE) gasket ring 19 according to
Under secondary loading in clamping nut 20, and pressure chamber body 15 is gently screwed in lower clamping nut 20.
Step 2: pouring into interior reference substance 17 into the cavity of polytetrafluoroethylene (PTFE) lower lock block 18, later by porous ceramics column 14
It is mounted on the upper end of 18 cavity of polytetrafluoroethylene (PTFE) lower lock block, then by the same polytetrafluoro as shown in Figure 2 of polytetrafluoroethylene (PTFE) upper holder block 12
Ethylene lower lock block 18 matches, and then capillary 10 is inserted into the through-hole at 12 axle center of polytetrafluoroethylene (PTFE) upper holder block, makes capillary
10 end of pipe is in contact with porous ceramics column 14.
Step 3: polytetrafluoroethylene (PTFE) gasket ring 13 in loading, and clamping nut 11 is installed, but do not screw.
Step 4: in nickel-base alloy pedestal 7 compared with pyrophyllite high-temperature insulation tapered sleeve 2 is put into small taper hole, oil jack is used
It presses into round table-like porous ceramics 8, is filled later with syringe into the through-hole and capillary 10 being connected with compared with small taper hole interior
Reference substance 17, and closely connect capillary 10 with the external thread column 9 of 7 bottom of pedestal using nut.
Step 5: screwing clamping nut 11 and lower clamping nut 20, makes internal each member in tight contact.
So far, the utility model external pressure-balancing type Ag/AgCl reference electrode is completed.
3, the integral installation and work of sensor
For heat-sealable working electrode, pedestal can be conveniently mounted to by the shape and size for changing pedestal 7 in advance
On high temperature pressure vessel.Wherein, spongy inert metal layer 3, round table-like porous ceramics 8 and high-temperature high pressure water fluid sample are direct
Contact.
Heat-sealable working electrode and external pressure-balancing type Ag/AgCl reference electrode in the utility model are installed in place
Afterwards, two electrodes can form one by " Pt work makees reference liquid ∣ Ag/ in electricity pole ∣ high temperature and pressure water flow body ∣ normal temperature high voltage water stream body ║
The electrochemical cell of AgCl reference electrode " composition, by the way that two contact conductors of sensor are accessed high input impedance digital multimeter,
Wherein working electrode lead 6 is connected with the anode of digital multimeter, and reference electrode lead 22 is connected with the cathode of multimeter, and will
After digital multimeter is docked with computer, the reality of the high temperature and pressure aqueous fluid in high temperature pressure vessel can continuously, be automatically obtained
When Eh value.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the protection scope of the utility model.
Claims (9)
1. a kind of Eh chemical sensor for high pressure hydrothermal system, including external pressure-balancing type reference electrode and heat-sealable
Working electrode, the working electrode lead of heat-sealable working electrode and the reference electrode lead of external pressure-balancing type reference electrode
Connect respectively with the positive and negative anodes of digital multimeter, wherein external pressure-balancing type reference electrode include pedestal (7), it is round table-like more
Hole ceramics (8) and external thread column (9), are equipped with the first taper hole on pedestal (7), and round table-like porous ceramics (8) is exhausted by high temperature resistant
Edge tapered sleeve (2) is mounted in the first taper hole, is equipped with external thread column (9) with holes, the bottom of the first taper hole in the lower end surface of pedestal (7)
Portion is connected to external thread column (9) by an axially extending bore, it is characterised in that: the external thread column (9) by capillary (10) with
In cold-zone there is externally threaded pressure chamber body (15) to be connected, mutually chimeric gather is installed in pressure chamber body (15)
Tetrafluoroethene upper holder block (12) and polytetrafluoroethylene (PTFE) lower lock block (18), polytetrafluoroethylene (PTFE) upper holder block (12) and polytetrafluoroethylene (PTFE) push
Block (18) is fixed on pressure chamber body (15) both ends, polytetrafluoroethyl-ne by upper clamping nut (11) and lower clamping nut (20) respectively
Alkene upper holder block (12) bottom has cylindrical cavity, and polytetrafluoroethylene (PTFE) lower lock block (18) upper end has corresponding cylindrical protrusions,
In cylindrical protrusions be equipped with cavity, porous ceramics column (14) are installed on the top of cavity, cavity it is under-filled have in
Reference substance (17), capillary (10) are mounted in the axis through-hole of polytetrafluoroethylene (PTFE) upper holder block (12), one end and porous ceramics
Column (14) is connected, and the other end extends outwardly and passes through clamping nut (11) to be connected with external thread column (9), reference electrode lead
(22) in the axis through-hole for installing polytetrafluoroethylene (PTFE) lower lock block (18), the upper end is connected with interior reference substance (17), and lower end is to extension
It stretches and passes through lower clamping nut (20) as lead.
2. the Eh chemical sensor according to claim 1 for high pressure hydrothermal system, it is characterised in that: the polytetrafluoro
Upper end, the lower end of polytetrafluoroethylene (PTFE) lower lock block (18) of ethylene upper holder block (12) are tapered, upper clamping nut (11) and pushing
Tight nut (20) corresponding position is the conical cavity to match.
3. the Eh chemical sensor according to claim 1 for high pressure hydrothermal system, it is characterised in that: the heat-sealable
Working electrode is mainly by pedestal (7), round table-like high-temperature insulation cone pad (5), high-temperature insulation tapered sleeve (2), round table-like high temperature resistant
Insulating ceramics (1), inert metal piece (4), spongy inert metal layer (3) and working electrode lead (6) composition, in pedestal
(7) it is equipped with the second taper hole, pedestal (7) axially has through-hole and the bottom of second taper hole to be connected to, and the convergence end of the second taper hole has
Round table-like high-temperature insulation cone pad (5) is bored in round table-like high-temperature insulation and is equipped with high-temperature insulation tapered sleeve (2) on pad (5),
Round table-like high-temperature insulation is installed ceramic (1) in high-temperature insulation tapered sleeve (2), ceramic (1) big end of round table-like high-temperature insulation
There is spongy inert metal layer (3) on face, there are inert metal piece (4) on small end face, the work in through-hole below the second taper hole
Make contact conductor (6) and passes through round table-like high-temperature insulation cone pad (5), by inert metal piece (4) and positioned at round table-like high temperature resistant
Working electrode lead in insulating ceramics (1) is realized and the spongy inertia gold on ceramic (1) end face of round table-like high-temperature insulation
Belong to the electric connection of layer (3).
4. the Eh chemical sensor according to claim 1 for high pressure hydrothermal system, it is characterised in that: the reference electricity
It is Ag/AgCl wire electrode that pole lead (22), which is located at the part in interior reference substance (17), and rest part is Ag contact conductor.
5. the Eh chemical sensor according to claim 1 for high pressure hydrothermal system, it is characterised in that: the interior reference
Object (17) is saturation KCl or NaCl solid-liquid mixtures.
6. the Eh chemical sensor according to claim 1 for high pressure hydrothermal system, it is characterised in that: described round table-like
The material of porous ceramics (8) and porous ceramics column (14) is porous aluminas or zirconia ceramics.
7. the Eh chemical sensor according to claim 1 for high pressure hydrothermal system, it is characterised in that: the resistance to height
Temperature insulation tapered sleeve (2) material is pyrophyllite, mica or boron nitride.
8. the Eh chemical sensor according to claim 3 for high pressure hydrothermal system, it is characterised in that: described round table-like
The material of high-temperature insulation ceramics (1) is corundum ceramic.
9. the Eh chemical sensor according to claim 1 for high pressure hydrothermal system, it is characterised in that: the work electricity
Pole lead (6) and inert metal piece (4) material are Pt.
Priority Applications (1)
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| CN201821258199.8U CN208795690U (en) | 2018-08-06 | 2018-08-06 | A kind of Eh chemical sensor for high pressure hydrothermal system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982619A (en) * | 2018-08-06 | 2018-12-11 | 中国科学院地球化学研究所 | A kind of Eh chemical sensor and preparation method thereof for high pressure hydrothermal system |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108982619A (en) * | 2018-08-06 | 2018-12-11 | 中国科学院地球化学研究所 | A kind of Eh chemical sensor and preparation method thereof for high pressure hydrothermal system |
| CN108982619B (en) * | 2018-08-06 | 2024-02-27 | 中国科学院地球化学研究所 | Eh chemical sensor for high-pressure hydrothermal system and preparation method thereof |
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