CN210269703U - Device for controlling extremely low oxygen content in atmosphere and measuring oxygen partial pressure of atmosphere - Google Patents
Device for controlling extremely low oxygen content in atmosphere and measuring oxygen partial pressure of atmosphere Download PDFInfo
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- CN210269703U CN210269703U CN201920909238.4U CN201920909238U CN210269703U CN 210269703 U CN210269703 U CN 210269703U CN 201920909238 U CN201920909238 U CN 201920909238U CN 210269703 U CN210269703 U CN 210269703U
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Abstract
The utility model provides a device for controlling extremely low oxygen content in atmosphere and measuring its oxygen partial pressure belongs to oxygen partial pressure measuring device technical field. The device comprises a deoxidizing furnace and an oxygen partial pressure measuring device, wherein mixed gas such as high-purity argon or nitrogen is processed by the deoxidizing furnace to obtain extremely low oxygen partial pressure gas, the extremely low oxygen partial pressure gas is heated to form an oxygen concentration difference battery on the surface of a stable zirconia oxygen determination probe through a quartz sleeve in the oxygen partial pressure measuring device, a tiny voltage signal is obtained, and the tiny voltage signal is transmitted to a PC (personal computer) end to calculate and obtain oxygen partial pressure data. Compare with other oxygen partial pressure measuring device, this device has higher measurement accuracy, and the deoxidation furnace can effectively reduce the oxygen partial pressure in the high-purity gas simultaneously, guarantees the accurate control to oxygen partial pressure in experiment and the production process.
Description
Technical Field
The utility model relates to an oxygen partial pressure measuring device technical field especially indicates a device that is arranged in control atmosphere utmost point low oxygen content and measures its oxygen partial pressure.
Background
In experiment and industrial production, the oxygen content in gas is required to be strictly controlled, and especially under the conditions of microgravity, high temperature and the like, the oxygen content is an important parameter for analyzing the behavior and some characteristics of substances. At present, the partial pressure of oxygen in gas can be reduced to 10 by adopting more deoxidation methods such as physical adsorption, catalytic deoxidation, chemical absorption and the like-2To 10-6MPa. Magnesium is a reactive metal and is very reactive with oxygen. High purity Ar, N2The oxygen partial pressure in the iso-gas is generally 10-6MPa, heating high-purity Ar to 50-650 ℃ (lower than the melting point of magnesium of 650 ℃), and controlling the oxygen partial pressure in the gas to be 10 through the temperature of the magnesium scrap pipe-3To 10- 26Is between MPa.
Oxygen partial pressure meters generally utilize the relationship between the magnitude of the oxygen flow and the conductivity of the oxygen ion conductor. The zirconia solid electrolyte has good ionic conductivity under certain conditions, and is widely applied to oxygen sensitive elements. Under conditions of high temperature and low oxygen partial pressure, zirconia often exhibits electron (or hole) conductivity. In an electrochemical cell with zirconia as the electrolyte, electrons will migrate from the negative electrode to the positive electrode and oxygen ions move in the opposite direction, thereby keeping the entire electrolyte electrically neutral everywhere.
The conventional oxygen partial pressure measuring instrument has limited measurement precision and is not suitable for measurement under extremely low oxygen partial pressure conditions, particularly under special conditions such as high temperature, microgravity and the like. The utility model provides a method and device that can be used for acquireing and measuring utmost point hypoxemia partial pressure, the utility model discloses also be applicable to the oxygen partial pressure measurement under special conditions such as high temperature and microgravity.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a device that is arranged in controlling the extremely low oxygen content of atmosphere and measures its oxygen partial pressure.
The device comprises a deoxidizing furnace and an oxygen partial pressure measuring device, wherein gas enters the deoxidizing furnace through a gas transmission pipeline, passes through a thermophysical property measuring device after being deoxidized by a gas deoxidizing filter layer in the deoxidizing furnace and enters the oxygen partial pressure measuring device or directly enters the oxygen partial pressure measuring device, and stable ZrO is utilized2The solid electrolyte was measured for its oxygen partial pressure.
Wherein:
the deoxidation furnace comprises a heating furnace, a stainless steel gas filter pipe, a heat preservation shell, a heating resistance wire and an embedded flange, wherein a gas supply system is connected with the stainless steel gas filter pipe through a gas transmission pipeline, a gas deoxidation filter layer is arranged in the stainless steel gas filter pipe, the heating resistance wire and the heat preservation shell are arranged outside the stainless steel gas filter pipe, the heating furnace is arranged on the lower portion of the heat preservation shell, the gas outlet end of the stainless steel gas filter pipe is sealed through the embedded flange, and the gas outlet end of the stainless steel gas filter pipe is connected with a gas outlet pipeline.
An air inlet valve is arranged at one end of the air delivery pipeline close to the stainless steel gas filter pipe, and an air outlet valve is arranged at one end of the air outlet pipeline close to the stainless steel gas filter pipe.
The gas deoxidation filtering layer contains magnesium chips; the temperature range of the heating furnace is 50-650 ℃; the air inlet flow rate of the air supply system is controlled to be 0.01-5.00 Nm3/h。
The granularity of magnesium chips in the gas deoxidation filtering layer is 80 mu m-3 mm; the gas deoxidation filtering layer comprises a multilayer filtering mode and a single-layer filtering mode, when the magnesium chips are fine in granularity, multilayer filtering is adopted, when multilayer filtering is adopted, the thickness of a single filtering layer is smaller than 1mm, and a filtering net is arranged at the tail of the filtering layer; when the magnesium chips are thick in granularity, single-layer filtering is adopted, and a filter screen at the tail of a filtering layer can be selected.
The oxygen partial pressure measuring device comprises an air inlet, a quartz tube, an embedded quartz tube, an oxygen determination probe, a platinum wire lead, an oxygen determination probe fixing table, an insulating tube A, a nickel wire lead, an insulating tube B, an air outlet, an embedded quartz tube air outlet end, embedded quartz tube air outlet holes and a single platinum rhodium thermocouple, wherein the air inlet and the air outlet are respectively positioned at two ends of the quartz tube, the embedded quartz tube is arranged at the position close to the air inlet in the quartz tube, the embedded quartz tube is provided with the embedded quartz tube air outlet end at the tail end, N (N >2) embedded quartz tube air outlet holes are uniformly distributed at the air outlet end of the embedded quartz tube along the circumference, the oxygen determination probe and the platinum wire lead are sequentially distributed behind the embedded quartz tube, the oxygen determination probe is fixed in the quartz tube through the oxygen determination probe fixing table, the inside and the outside of the oxygen determination probe are respectively connected with the nickel wire lead and the platinum wire lead, the platinum wire is, the nickel wire lead led out from the tail end of the oxygen determination probe and the platinum wire lead led out from the insulating tube A are packaged in the insulating tube B together, and a single platinum rhodium thermocouple is fixed on one side of the insulating tube B.
The oxygen determination probe comprises a platinum wire lead, a nickel wire lead, Ni-NiO mixed powder, a thermosetting inorganic binder and Y2O3·ZrO2Oxygen probe housing, wherein Y2O3·ZrO2The shell of the oxygen determination probe is uniformly covered outside the oxygen determination probe, and the platinum wire is wound on the Y2O3·ZrO2One end of the shell of the oxygen determination probe is filled with Ni-NiO mixed powder and filled in Y of the oxygen determination probe2O3·ZrO2The oxygen probe is filled with thermosetting inorganic adhesive2O3·ZrO2The oxygen determination probe comprises an oxygen determination probe shell, a nickel wire lead, an insulating tube C, a coil of the nickel wire lead, a Ni-NiO mixed powder and a thermosetting inorganic binder, wherein the Ni-NiO mixed powder is used for packaging the Ni-NiO mixed powder in the oxygen determination probe shell, the insulating tube C is wrapped outside the nickel wire lead, the coil of the nickel wire lead is fixed in the Ni-NiO mixed powder filled at the top of the oxygen determination probe, and a lead of the nickel wire lead coil penetrates through the Ni.
Y2O3·ZrO2Y in the shell of the oxygen determination probe2O3The mass ratio of the contents is 3 to 20 percent; the mass ratio of Ni and NiO in the filled Ni-NiO mixed powder is 0.8-1.5.
Platinum wire lead and nickel wire lead led out from the quartz tube of the oxygen partial pressure device are connected to a voltmeter.
The diameter of the air outlet hole of the embedded quartz tube is 1-2 mm.
The deoxidizer used by the device is magnesium chips, and the oxygen partial pressure in the gas is controlled by controlling the granularity and the temperature of the magnesium chips. Heating the gas to 200-600 ℃ by using a heating furnace, then deoxidizing the gas by using a gas deoxidizing filter layer consisting of magnesium chips, enabling the deoxidized gas to enter an oxygen partial pressure measuring device, generating a tiny potential difference on an oxygen determination probe, measuring the potential difference by using a voltmeter, and then calculating by using a PC to obtain an oxygen partial pressure value.
The oxygen partial pressure measuring apparatus uses Y2O3·ZrO2Oxygen concentration cell composed of solid electrolyte as oxygen sensor, zirconium oxide (ZrO)2) As an oxygen ion conductor, yttrium oxide (Y)2O3) As a stabilizer, the content ratio is 5 to 20 percent; mixed powder of Ni and NiO is used as a reference electrode, and the mixing ratio is 0.8 to 1.5. Setting the oxygen partial pressure of the gas to be measured as PO2The oxygen partial pressure at the reference electrode side is set to PO2(Ni-NiO)Then an electromotive force E is generated between the clicks on both sides of the electrolyte:
E＝-(RT/4F)ln(PO2/PO2(Ni-NiO))
wherein: e is the cell electromotive force and R is the gas constant (8.3143J K)-1·mol-1) T is the cell temperature, F is the Faraday constant (9.65X 10)4C mol-1)。
The equilibrium oxygen partial pressures of Ni and NiO were as follows:
PO2(Ni-NiO)＝exp(2ΔGθ/RT)
ΔGθ＝-232870+83.23T(J mol-1)
wherein: Δ GθIs the standard gibbs free energy of formation for NiO.
Thus, the oxygen partial pressure in the gas phase is:
PO2＝exp[(4EF+2ΔGθ)/RT]
the nickel wire and platinum wire of the oxygen determination probe are connected into a voltmeter, and the potential difference is measured, so that the oxygen partial pressure in the gas can be calculated. The first table shows the correspondence between the partial potential difference and the oxygen partial pressure.
Part of the potential difference corresponds to the oxygen partial pressure in Table 11073K
The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:
compared with other oxygen partial pressure measuring methods, the method has higher measuring precision, and meanwhile, the deoxidation furnace can effectively reduce the oxygen partial pressure in the high-purity gas and ensure the accurate control of the oxygen partial pressure in the experiment and production processes.
Drawings
FIG. 1 is a schematic diagram of the apparatus for controlling the very low oxygen content and measuring the partial oxygen pressure in an atmosphere according to the present invention;
FIG. 2 is a schematic structural view of a deoxidation furnace apparatus of the apparatus for controlling the very low oxygen content and measuring the oxygen partial pressure of the atmosphere in accordance with the present invention;
FIG. 3 is an oxygen partial pressure measuring device of the present invention for controlling the very low oxygen content in an atmosphere and measuring the oxygen partial pressure thereof;
fig. 4 is a schematic structural view of the oxygen determination probe of the device for controlling the very low oxygen content and measuring the oxygen partial pressure in the atmosphere according to the present invention.
Wherein: 1-gas supply system, 2-gas pipeline, 3-gas inlet valve, 4-heat preservation shell, 5-heating resistance wire, 6-stainless steel gas filter tube, 7-gas deoxidation filter layer, 8-gas outlet valve, 9-gas outlet pipeline, 10-heating furnace, 11-embedded flange, 12-gas inlet, 13-quartz tube, 14-embedded quartz tube, 15-oxygen determination probe, 16-platinum wire, 17-oxygen determination probe fixing platform, 18-insulating tube A, 19-nickel wire, 20-insulating tube B, 21-gas outlet, 22-embedded quartz tube gas outlet end, 23-embedded quartz gas outlet tube hole, 24-filling Ni-NiO mixed powder, 25-thermosetting inorganic binder, 26-insulating tube C, 27-Y2O3·ZrO2Oxygen determination probe shell, 28-single platinum rhodium thermocouple.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The utility model provides a device for controlling extremely low oxygen content in atmosphere and measuring its oxygen partial pressure.
As shown in figures 1, 2 and 3, the device comprises a deoxidation furnace and an oxygen partial pressure measuring device, wherein gas enters the deoxidation furnace through a gas transmission pipeline 2, enters the thermophysical property measuring device or directly enters the oxygen partial pressure measuring device after being deoxidized by a gas deoxidation filter layer 7 in the deoxidation furnace, and utilizes stable ZrO2The solid electrolyte was measured for its oxygen partial pressure.
Wherein:
the gas supply system 1 is connected with a stainless steel gas filtering pipe 6 through a gas transmission pipeline 2, a gas deoxidation filtering layer 7 is arranged in the stainless steel gas filtering pipe 6, a heating resistance wire 5 is arranged outside the stainless steel gas filtering pipe 6, a heat preservation shell 4 is arranged outside the heating resistance wire 5, a heating furnace 10 is arranged on the lower portion of the heat preservation shell 4, the gas outlet end of the stainless steel gas filtering pipe 6 is sealed through an embedded flange 11, and the gas outlet end of the stainless steel gas filtering pipe 6 is connected with a gas outlet pipeline 9.
The gas deoxidation filtering layer 7 contains magnesium chips; the temperature range of the heating furnace 10 is 50-650 ℃; the air inlet flow rate of the air supply system is controlled to be 0.01-5.00 Nm3/h。
The granularity of magnesium chips in the gas deoxidation filtering layer 7 is 80 mu m-3 mm; the gas deoxidation filtering layer 7 comprises a multilayer filtering mode and a single-layer filtering mode, when the magnesium chips are fine in granularity, multilayer filtering is adopted, when multilayer filtering is adopted, the thickness of a single filtering layer is smaller than 1mm, and a filtering net is arranged at the tail of the filtering layer; when the magnesium chips are thick in granularity, single-layer filtering is adopted, and a filter screen at the tail of a filtering layer can be selected.
As shown in fig. 3, the oxygen partial pressure measuring device comprises an air inlet 12, a quartz tube 13, an embedded quartz tube 14, an oxygen determination probe 15, a platinum wire lead 16, an oxygen determination probe fixing platform 17, an insulating tube a18, a nickel wire lead 19, an insulating tube B20, an air outlet 21, an air outlet end 22 of the embedded quartz tube, an air outlet hole 23 of the embedded quartz tube, and a single platinum rhodium thermocouple 28, wherein the air inlet 12 and the air outlet 21 are respectively positioned at two ends of the quartz tube 13, the embedded quartz tube 14 is arranged in the quartz tube 13 at a position close to the air inlet 12, the air outlet end 22 of the embedded quartz tube is arranged at the lower end of the embedded quartz tube 14, N (N >2) embedded quartz tube air outlet holes 23 are uniformly distributed at the circumference of the embedded quartz tube air outlet end 22, the oxygen determination probe 15 and the platinum wire lead 16 are sequentially distributed below the quartz tube 14, the oxygen determination probe 15 is fixed in the quartz tube 13 through the, the inside and the outside of the oxygen determination probe 15 are respectively connected with a nickel wire lead 19 and a platinum wire lead 16, the platinum wire lead 16 is fixed on an oxygen determination probe fixing table 17 through an insulating tube A18, the nickel wire lead 19 led out from the tail end of the oxygen determination probe 15 and the platinum wire lead 16 led out from an insulating tube A18 are packaged in an insulating tube B20 together, and a single platinum rhodium thermocouple 28 is fixed on one side of the insulating tube B20.
As shown in FIG. 4, the oxygen probe 15 comprises a platinum wire lead 16, a nickel wire lead 19, a Ni-NiO mixed powder 24, a thermosetting inorganic binder 25, and Y2O3·ZrO2Oxygen determination probe housing 27, wherein Y2O3·ZrO2The oxygen determination probe shell 27 is uniformly covered outside the oxygen determination probe 15, and the platinum wire lead 16 is wound on the Y2O3·ZrO2One end of the oxygen determination probe shell 27 is filled with Ni-NiO mixed powder 24 and filled in Y on the upper part of the oxygen determination probe 152O3·ZrO2The oxygen probe 15 is filled with a thermosetting inorganic adhesive 25 in the oxygen probe case 272O3·ZrO2In the oxygen probe case 27, the coil of the nickel wire 19 is fixed in the Ni-NiO mixed powder 24 filled in the oxygen probe 15, and the lead of the coil of the nickel wire 19 is led out from the oxygen probe 15 through the Ni-NiO mixed powder 24 and the thermosetting inorganic binder 25.
Y2O3·ZrO2Y in the oxygen determination probe casing 272O3The content ratio is 3% -20%; the mixing ratio of Ni and NiO mixed powder in the Ni-NiO mixed powder 24 is 0.8 to 1.5.
A platinum wire 16 and a nickel wire 19 led out from the quartz tube 13 of the oxygen partial pressure device are connected to a voltmeter.
The diameter of the air outlet hole 23 of the embedded quartz tube is 1-2 mm.
The preferred embodiment of the utility model is as follows:
high-purity Ar enters the deoxidizing furnace through a gas transmission pipeline 2, and the gas inlet flow is controlled by a gas inlet valve 3. The gas deoxidation filtering layer 7 mainly comprises magnesium chips and is adjustedThe granularity and distribution of the magnesium chips and the heating temperature control the deoxidation depth. The gas is heated by the heating resistance wire 5 to promote the reaction of the gas and the magnesium chips. Because the thermal conductivity coefficient of the gas is low, a layer of heat-insulating shell 4 is required to be additionally arranged outside the gas filter pipe to reduce the loss of heat; in addition, too high a flow rate is detrimental to deep deoxygenation. Controlling the flow rate of intake air to 0.01 to 5.00Nm3Heating temperature is controlled between 50 ℃ and 650 ℃, deoxidized gas is introduced into a high-temperature thermophysical property measuring device with the temperature of 100 ℃ to 2000 ℃, the surface tension, the density, the contact angle and the wettability of the melt such as metal or alloy are accurately measured, and the gas passing through the high-temperature thermophysical property measuring device can be used for measuring the oxygen partial pressure by using an oxygen determination device. Or the deoxidized gas directly enters an oxygen partial pressure measuring device through the gas outlet pipeline 9, and when the oxygen partial pressure is measured, the oxygen partial pressure measuring device needs to be arranged in a heating furnace 10 to be heated to 800 ℃ for constant temperature.
The oxygen determination device mainly comprises a quartz tube 13, an embedded quartz tube 14 and an oxygen determination probe 15. In order to prevent measurement errors in the formation of an oxygen concentration boundary layer at the solid electrolyte-gas phase interface, the gas outlet end 22 of the embedded quartz tube 14 is provided with 6 to 8 gas outlet holes 23 having a size of between 1 and 2 mm. The gas enters the embedded quartz tube 14 and sweeps the surface of the oxygen determination probe 15 when being discharged from the 6-8 holes. The oxygen probe 15 and the insulating tube a18 are fixed inside the quartz tube 13 by an oxygen probe fixing stand 17. The shell of the oxygen determination probe is mainly ZrO2The platinum wire 16 is wound on the outer side, and the nickel wire 19 is used as the electrode in the tube. The lead wire is connected out of the quartz tube 13 and is connected with a high-precision voltage measuring device, and the oxygen partial pressure value in the gas is obtained through calculation.
When the oxygen sensor is used for detecting oxygen by using air and argon standard gas containing 2% of oxygen, the error is 0.5-3%, and the error of the argon standard gas with the oxygen concentration of 1ppm is 1-5%.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An apparatus for controlling the very low oxygen content of an atmosphere and measuring its oxygen partial pressure, characterized in that: comprises a deoxidizing furnace and an oxygen partial pressure measuring device, wherein, gas enters the deoxidizing furnace through a gas transmission pipeline (2), passes through the thermal physical property measuring device after being deoxidized by a gas deoxidizing filter layer (7) in the deoxidizing furnace and enters the oxygen partial pressure measuring device or directly enters the oxygen partial pressure measuring device, and the stable ZrO is utilized2The solid electrolyte measures the partial pressure of oxygen in the gas.
2. The device for controlling the very low oxygen content and measuring the oxygen partial pressure in an atmosphere according to claim 1, characterized in that: the deoxidizing furnace comprises a heating furnace (10), a stainless steel gas filtering pipe (6), a heat preservation shell (4), a heating resistance wire (5) and an embedded flange (11), wherein the gas supply system (1) is connected with the stainless steel gas filtering pipe (6) through a gas transmission pipeline (2), a gas deoxidizing filter layer (7) is arranged in the stainless steel gas filtering pipe (6), the heating resistance wire (5) is arranged outside the stainless steel gas filtering pipe (6), the heat preservation shell (4) is arranged outside the heating resistance wire (5), the heating furnace (10) is arranged on the lower portion of the heat preservation shell (4), the gas outlet end of the stainless steel gas filtering pipe (6) is sealed through the embedded flange (11), and the gas outlet end of the stainless steel gas filtering pipe (6) is connected with a gas outlet pipeline (9).
3. The device for controlling the very low oxygen content and measuring the oxygen partial pressure in an atmosphere according to claim 2, characterized in that: one end of the gas transmission pipeline (2) close to the stainless steel gas filtering pipe (6) is provided with a gas inlet valve (3), and one end of the gas outlet pipeline (9) close to the stainless steel gas filtering pipe (6) is provided with a gas outlet valve (8).
4. The device for controlling the very low oxygen content and measuring the oxygen partial pressure in an atmosphere according to claim 2, characterized in that: the gas deoxidation filtering layer (7) contains magnesium chips; the temperature range of the heating furnace (10) is 50-650 ℃; the air inlet flow rate of the air supply system (1) is controlled to be 0.01-5.00 Nm3/h。
5. Device for controlling the very low oxygen content and measuring the oxygen partial pressure in an atmosphere according to claim 4, characterized in that: the particle size of the magnesium chips in the gas deoxidation filtering layer (7) is 80 mu m-3 mm; the gas deoxidation filtering layer (7) comprises a multilayer filtering mode and a single-layer filtering mode, wherein multilayer filtering is adopted when the magnesium chips are fine in granularity, the thickness of a single filtering layer is smaller than 1mm, and a filtering net is arranged at the tail of the filtering layer; when the particle size of the magnesium chips is coarse, single-layer filtration is adopted.
6. The device for controlling the very low oxygen content and measuring the oxygen partial pressure in an atmosphere according to claim 1, characterized in that: the oxygen partial pressure measuring device comprises an air inlet (12), a quartz tube (13), an embedded quartz tube (14), an oxygen determination probe (15), a platinum wire lead (16), an oxygen determination probe fixing table (17), an insulating tube A (18), a nickel wire lead (19), an insulating tube B (20), an air outlet (21), an air outlet end (22) of the embedded quartz tube, an air outlet hole (23) of the embedded quartz tube and a single platinum rhodium thermocouple (28), wherein the air inlet (12) and the air outlet (21) are respectively positioned at two ends of the quartz tube (13), the embedded quartz tube (14) is installed at a position close to the air inlet (12) inside the quartz tube (13), the air outlet end (22) of the embedded quartz tube is the air outlet end (14) of the embedded quartz tube, the air outlet end (22) of the embedded quartz tube is uniformly distributed with more than 2 air outlet holes (23) along the circumference, the oxygen determination probe (15) and the oxygen determination probe (15) are sequentially, The oxygen determination probe (15) is fixed inside the quartz tube (13) through the oxygen determination probe fixing table (17), the oxygen determination probe (15) is connected with the nickel wire (19) and the platinum wire (16), the platinum wire (16) is fixed on the oxygen determination probe fixing table (17) through the insulating tube A (18), the nickel wire (19) led out from the tail end of the oxygen determination probe (15) and the platinum wire (16) led out from the insulating tube A (18) are packaged in the insulating tube B (20) together, and the single platinum rhodium thermocouple (28) is fixed beside the insulating tube B (20).
7. Device for controlling the very low oxygen content and measuring the oxygen partial pressure in an atmosphere according to claim 6, characterized in that: the oxygen determination probe (15) comprises a platinum wire lead (16), a nickel wire lead (19), Ni-NiO mixed powder (24) filled in, a thermosetting inorganic binder (25) and Y2O3·ZrO2Oxygen determinationA probe housing (27), wherein Y2O3·ZrO2The oxygen determination probe shell (27) is uniformly covered outside the oxygen determination probe (15), and a platinum wire lead (16) is wound on the Y2O3·ZrO2One end of an oxygen determination probe shell (27) is filled with Ni-NiO mixed powder (24) and filled in Y of the oxygen determination probe (15)2O3·ZrO2The oxygen probe casing (27) is filled with a thermosetting inorganic adhesive (25) in the Y-shape of the oxygen probe (15)2O3·ZrO2The oxygen determination probe comprises an oxygen determination probe shell (27), wherein the oxygen determination probe shell is used for packaging Ni-NiO mixed powder (24), a coil of a nickel wire lead (19) is fixed in the Ni-NiO mixed powder (24), the nickel wire lead (19) is externally wrapped by an insulating tube C (26), and a lead of the coil of the nickel wire lead (19) penetrates through the filled Ni-NiO mixed powder (24) and a thermosetting inorganic binder (25) and is led out from an oxygen determination probe (15).
8. Device for controlling the very low oxygen content and measuring the oxygen partial pressure in an atmosphere according to claim 7, characterized in that: said Y is2O3·ZrO2Y in oxygen determination probe shell (27)2O3The mass ratio of the contents is 3 to 20 percent; the mass ratio of Ni and NiO in the filled Ni-NiO mixed powder (24) is 0.8 to 1.5.
9. Device for controlling the very low oxygen content and measuring the oxygen partial pressure in an atmosphere according to claim 6, characterized in that: and a platinum wire lead (16) and a nickel wire lead (19) which are led out from a quartz tube (13) of the oxygen partial pressure device are connected to a voltmeter.
10. Device for controlling the very low oxygen content and measuring the oxygen partial pressure in an atmosphere according to claim 6, characterized in that: the diameter of the air outlet hole (23) of the embedded quartz tube is 1-2 mm.
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