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1. 发明专利

JPH05340917A 失效
公开(公告)号：JPH05340917A
公开(公告)日：1993-12-24
申请号：JP16999292
申请日：1992-06-05
申请人： OSAKA OXYGEN IND , SASABE MINORU , NIPPON KOKAN KK
发明人： SASABE MINORU , FURUTA CHIKAYOSHI , NAGATSUKA TOSHIO , TAKAOKA TOSHIO , KIKUCHI YOSHITERU
IPC分类号： G01N27/411
摘要： PURPOSE:To obtain a measuring probe of Mn activity in a molten metal which is inexpensive and has a high measurement success rate and excellent responsiveness, by providing a coating with a cut part formed on the circumference thereof being perpendicular to the longitudinal direction of a solid electrolyte on the occasion when the outer surface of the solid electrolyte is coated with an Mn oxide. CONSTITUTION:A standard electrode 2 is sealed in and fixed inside a solid electrolyte 1 having one end shaped in a closed tube, with a standard electrode fixing member 3, and a standard electrode lead 4 is taken out from the standard electrode 2, while the end of the electrolyte 1 is sealed hermetically with a sealing agent 6. A coating 5 coats the whole outer surface of the electrolyte 1. Since a gap is formed between the electrolyte 1 and the coating 5 in a molten metal on the occasion of forming the coating 5, measuring precision and waveform stability are lowered. In order to absorb the gap caused by a difference in the thermal expansion between them, a part of the coating 5 is cut. As for the shape the cut, it is advisable to form it on the circumference being perpendicular to the longitudinal direction, and a to the position of the cut, it is advisable to provide it in a range of 5 to 10mm from the fore end of the closed side of the electrolyte 1.

2. 发明专利

JPH05340920A 失效
公开(公告)号：JPH05340920A
公开(公告)日：1993-12-24
申请号：JP16999492
申请日：1992-06-05
申请人： OSAKA OXYGEN IND , SASABE MINORU , NIPPON KOKAN KK
发明人： SASABE MINORU , FURUTA CHIKAYOSHI , NAGATSUKA TOSHIO , TAKAOKA TOSHIO , KIKUCHI YOSHITERU
IPC分类号： G01N27/411 , G01N33/20
摘要： PURPOSE:To obtain a method for measuring precisely the concentration of carbon and the concentration of Mn in a molten metal without impairing quickness. CONSTITUTION:The temperature T of a molten metal is measured and oxygen activity ao contained in the molten metal is measured, while measurement of a solidification temperature TCD is executed. After Mn activity aMn is measured, moreover, rough Mn concentration [%Mn]* is computed from the Mn activity aMn, the oxygen activity ao and the temperature T, and rough carbon concentration [%C]* is computed from the rough Mn concentration [%Mn]* and the solidification temperature TCD. Mn concentration [%Mn] is determined from the Mn activity aMn or the rough Mn concentration [%Mn]*, the oxygen activity ao, the rough carbon concentration [%C]* and the temperature T and, moreover, carbon concentration [%C] is determined from the solidification temperature T

3. 发明专利

JPH05340919A 失效
公开(公告)号：JPH05340919A
公开(公告)日：1993-12-24
申请号：JP16999392
申请日：1992-06-05
申请人： OSAKA OXYGEN IND , SASABE MINORU , NIPPON KOKAN KK
发明人： SASABE MINORU , FURUTA CHIKAYOSHI , NAGATSUKA TOSHIO , TAKAOKA TOSHIO , KIKUCHI YOSHITERU
IPC分类号： G01K7/00 , G01K7/02 , G01N27/406 , G01N27/411
摘要： PURPOSE:To enable simultaneous transmission of a plurality of sensor signals by using multielectrode electric connector and a multiconductor cable which exist, by using plus or minus electrodes of sensors as a common lead and by connecting the sensors with the multielectrode electric connector. CONSTITUTION:A measuring electrode 3 is common for both an oxygen activity measuring sensor 2 and an Mn activity measuring sensor 13. Plus or minus electrodes of the sensors 2 and 13 of different kinds provided for measuring the amount and state of each constituent of a molten metal are used as a common lead and thereby these sensors 2 and 13 are connected with a multielectrode electric connector 10. Since one or a plurality of common leads serve also as leads of the plus or minus electrodes of the sensors 2 and 13 in this way, the number of connector pins of the connector 10 and the number of conductors of a cable can be reduced to those which are smaller than the double of the number of the sensors.

4. 发明专利

JPH04132950A PROBE FOR MEASURING ACTIVITY OF SOLUTE ELEMENT WITHIN FUSED METAL USING MIXED SUB-ELECTRODE 失效
公开(公告)号：JPH04132950A
公开(公告)日：1992-05-07
申请号：JP25413390
申请日：1990-09-26
申请人： NIPPON KOKAN KK , SASABE MINORU , OSAKA OXYGEN IND
发明人： SASABE MINORU , KAWAI YOSHIHIKO , KIKUCHI YOSHITERU , TAKAOKA TOSHIO , SENOO HIROMI , FURUTA CHIKAYOSHI , NAGATSUKA TOSHIO
IPC分类号： G01N27/411 , G01N27/406 , G01N27/409 , G01N27/416
摘要： PURPOSE:To enable activity of a solute element to be measured by coating an outer periphery of a solid electrolyte with a compound other than an oxide of the solute element to be measured and a sub-electrode consisting of a mixed object of an oxide of an element other than the solute element forming it. CONSTITUTION:A standard electrode 5 of a probe consists of a solid electrolyte 2, a standard pole substance 3, a standard pole lead 4, and a mixed sub-electrode 1 which is formed as a coated layer on an entire surface of the electrolyte 2. A solute element to be measured is set to Y, an element for forming a compound with Y is set to M, a compound of those is set to MYX, an oxide of M is set to MO2 (subscripts x and z indicate Y and M and a chemical stoichiometric ratio of oxygen for M) and then a layer to be coated is formed by an electrode 1 which consists of a mixture of a compound MYX other than an oxide containing an element Y to be measured and an oxide MO2 of the element M other than the element Y which constitutes this compound MYX. Then, a probe is dipped into a melted metal and oxygen divided pressure related to balanced reaction of the element Y and the electrode 1 is measured and activity of the original element Y are obtained.

5. 发明专利

JPH0273147A MEASUREMENT OF ACTIVITY OF SOLUTE ELEMENT IN MOLTEN METAL 失效
公开(公告)号：JPH0273147A
公开(公告)日：1990-03-13
申请号：JP22433688
申请日：1988-09-07
申请人： NIPPON KOKAN KK , OSAKA OXYGEN IND , SASABE MINORU
发明人： SASABE MINORU , HASEGAWA TERUYUKI , ISHIKAWA HIROAKI , KAWAI YOSHIHIKO , FURUTA CHIKAYOSHI , NAGATSUKA TOSHIO , MATSUSHIGE HARUHIKO
IPC分类号： G01N27/411 , C21C5/28 , F27D21/00
摘要： PURPOSE:To detect the activity aM1 of an objective element with high accuracy by determining the oxygen electromotive force E1 and temperature T of a molten metal by use of a solid electrolyte having oxygen ion conductivity and determining the electromotive force E1 of the objective element by use of a solid electrolyte having oxygen conductivity and covered with an oxide which contains the objective element. CONSTITUTION:When an oxygen sensor comprising a solid electrolyte covered with MOx is dipped in a molten metal containing the solute element M, a local equilibrium layer is formed at the interface of the coating and the molten metal. The activity aM1 of the element M in the molten metal is a function of the activity of oxygen a01, activity of oxygen a02 in the equilibrium layer and temperature T, caused by the correlation due to decomposition of the coating layer. The a01 and a02 can be determined from the electromotive force E1 and E2, which means that aM1 becomes a function of E1, E2 and T. As the oxygen electromotive force E1 is taken in consideration on determination of the activity aM1, accuracy of the measurement is improved. Thereby, the activity of element such as Mn, Cr, etc., in a molten metal can be determined with high accuracy.

6. 发明专利

JPH0373843A PROBE FOR MEASURING ACTIVITY OF SOLUTE ELEMENT IN MOLTEN IRON 失效
公开(公告)号：JPH0373843A
公开(公告)日：1991-03-28
申请号：JP21002089
申请日：1989-08-16
申请人： NIPPON KOKAN KK , OSAKA OXYGEN IND , SASABE MINORU
发明人： SASABE MINORU , TAKAOKA TOSHIO , KIKUCHI YOSHITERU , KAWAI YOSHIHIKO , FURUTA CHIKAYOSHI , MATSUSHIGE HARUHIKO , NAGATSUKA TOSHIO
IPC分类号： G01N27/411 , G01N33/20
摘要： PURPOSE:To prevent the peeling of the covering of the probe from the electrolyte by enclosing the outer side of the solid electrolyte of the probe with refractories having the inflow port of molten iron and disposing a material which maintains the specified activity of the oxide of a solute element between the solid electrolyte and the refractories. CONSTITUTION:A detecting element 2 consists of the buttomed cylindrical solid electrolyte 4, a reference material 5 put therein, an Mo electrode 6, the material 10 which maintains the specified activity of the oxide of the solute element in the molten iron filled between the solid electrolyte 4 and the refractories 8. The solid electroyte 4 consists of ZrO2 and 7mol% MgO and a mixture composed of Cr and Cr2O3 is usable as the reference material 5. The refractories 8 consists of a quartz tube or porous alumina tube 8 and has two holes as the inflow port 9 for the molten iron alpha. The molten iron alpha flows into the spacing between the refractories 8 and the oxide 10 from the inflow port 9 when the measuring probe is immersed into the molten iron alpha. The activity of the solute element is determined by measuring the temp. of the molten iron alpha of this time and measuring the electromotive force by a potentiometer 3.

7. 发明专利

JPH0373842A PROBE FOR MEASURING ACTIVITY OF SOLUTE ELEMENT IN MOLTEN IRON 失效
公开(公告)号：JPH0373842A
公开(公告)日：1991-03-28
申请号：JP21001989
申请日：1989-08-16
申请人： NIPPON KOKAN KK , OSAKA OXYGEN IND , SASABE MINORU
发明人： SASABE MINORU , KIKUCHI YOSHITERU , TAKAOKA TOSHIO , KAWAI YOSHIHIKO , FURUTA CHIKAYOSHI , MATSUSHIGE HARUHIKO , NAGATSUKA TOSHIO
IPC分类号： G01N27/411 , G01N33/20
摘要： PURPOSE:To prevent the peeling and expending of the coating of the probe and to obtain high measurement accuracy by coating the surface of a solid electrolyte with a material having the specified activity of the oxide of the solute material in a molten iron and enclosing the outside thereof with porous refractories through which the molten iron can pass. CONSTITUTION:This activity measuring instrument is constituted of a measuring electrode 1, a detecting element 2, a potentiometer 3, the solid electrolyte 4, a reference material 5, an electrode 6, the coating 7, the porous refractories 8, a clearance 9, the molten iron alpha, a housing 10, a connector 11, a protective pipe 12, an upper cap 13, and a thermocouple 14. The detecting element 2 is constituted of the blinded cylindrical solid electrolyte 4, the reference material 5 put therein, the Mo electrode 6, the coating 7 of the material for maintaining the specified activity of the oxide of the solute in the molten iron applied on the surface of the solid electrolyte 4, and the porous refractories 8 enclosing the same. The molten iron alpha passes the refractories 8 and infilters the spacing with the film 7 when the detecting element is immersed into the molten iron alpha. The temp. of this time is measured by the thermocouple 14 and electromotive force is measured by the potentiometer 3, by which the activity of the solute element is determined.

8. 发明专利

JPH0278945A PROBE FOR MEASURING ACTIVITY OF SOLUTE ELEMENT IN MOLTEN METAL 失效
公开(公告)号：JPH0278945A
公开(公告)日：1990-03-19
申请号：JP23098488
申请日：1988-09-14
申请人： NIPPON KOKAN KK , OSAKA OXYGEN IND , SASABE MINORU
发明人： SASABE MINORU , HASEGAWA TERUYUKI , ISHIKAWA HIROAKI , KAWAI YOSHIHIKO , FURUTA CHIKAYOSHI , NAGATSUKA TOSHIO , MATSUSHIGE HARUHIKO
IPC分类号： G01N27/411 , G01N27/406 , G01N33/20
摘要： PURPOSE:To allow the measurement of respective electromotive forces with a piece of element by using the element for measuring a solute element formed by coating the outer periphery of a solid electrolyte having oxygen ion conductivity with such a material with which the activity of the oxidation of the solute element to be measured attains a specified value. CONSTITUTION:A counter electrode 1 of the probe for measuring activity is mounted on a housing 10 and is connected to a potentiometer via a connector 11. A standard electrode 2 is consisting of the blinded cylindrical solid electrolyte 4, an Mo wire electrode 6 which is immersed at the front end in a reference material 5 put therein and the connector 11 of which is connected to the potentiometer, and the coating 7 of such material with which the activity aMOX of the oxide MOx of the element M attains the specified value and which is applied on the surface of the electrolyte 4. A 1st equil. part A and a 2nd equil. part B appear in an electromotive force curve upon lapse of time and stabilize thereafter if the probe constituted in such a manner is immersed into a molten metal. The electromotive force E in the equil. part A corresponds to the electromotive force of the solute element in the molten metal and the electromotive force E in the equil. part B corresponds to the oxygen electromotive force in the molten metal.

9. 发明专利

JPH0273148A METHOD FOR MEASURING ACTIVITY OF SOLUTE ELEMENT IN MOLTEN METAL AND MEASURING PROBE 失效
公开(公告)号：JPH0273148A
公开(公告)日：1990-03-13
申请号：JP22433788
申请日：1988-09-07
申请人： NIPPON KOKAN KK , OSAKA OXYGEN IND , SASABE MINORU
发明人： SASABE MINORU , HASEGAWA TERUYUKI , ISHIKAWA HIROAKI , KAWAI YOSHIHIKO , FURUTA CHIKAYOSHI , NAGATSUKA TOSHIO , MATSUSHIGE HARUHIKO
IPC分类号： G01N27/411 , C21C5/28 , C21C5/46
摘要： PURPOSE:To measure the activity aM of a solute element M by charging the probe coated with material the activity of the oxide of which is a function of the solute to be measured even if the activity is not constant into a molten metal. CONSTITUTION:A standard material 5 is inserted into and brought into contact with a cylindrical solid electrolyte 4 and a coating 7 of the oxide MOx of the element M is applied to the outer side thereof to form a standard electrode 2. This material is immersed together with an electrode 1 into the molten metal (a) and the activity aM is determined. The prescribed equation of the activities aM and aMOX is obtd. in accordance with the electromotive force EMF generated in a potentiometer 3 by using the standard formation free energy DELTAGMO-MOx of the reaction when the element M and O2 are in the equil. state and the standard formation free energy DELTAGNO-NOy at the time when the element N of the standard material oxidizes and forms 1mol NOy and the Faraday's con stant. The aM becomes the function of EMF and temp. and can be measured if the aMOx is rounded as the function of the activity aM. The activity of the Mn, Cr, etc., in the molten metal is rapidly measured according to this method.

10. 发明专利

JPH05340918A 失效
公开(公告)号：JPH05340918A
公开(公告)日：1993-12-24
申请号：JP16999592
申请日：1992-06-05
申请人： OSAKA OXYGEN IND , SASABE MINORU , NIPPON KOKAN KK
发明人： SASABE MINORU , FURUTA CHIKAYOSHI , NAGATSUKA TOSHIO , MIHASHI KENJI , TAKAOKA TOSHIO , KIKUCHI YOSHITERU , WASHIMI IKUHIRO
IPC分类号： G01N27/411
摘要： PURPOSE:To improve the measuring precision and the measurement success rate of a probe by mixing an iron oxide beforehand in a coating made of an oxide of a solute element to be measured or a composite oxide containing the oxide of the solute element to be measured. CONSTITUTION:A standard electrode 2 is disposed in contact with a solid electrolyte 1 and a standard electrode lead 3 is taken out, while a coating 4 is disposed on the opposite side of the electrolyte 1 to the standard electrode 2. When the coating 4 comes into contact with a molten metal 5, a layer 6 of local equilibrium being different from the metal 5 is formed. In the layer 6 of equilibrium, an oxide of a solute element to be measured and the solute element to be measured in the molten iron reach equilibrium, and the activity of oxygen in the layer 6 of equilibrium has a value corresponding to the activity of the solute element to be measured in the molten iron. When a difference in oxygen potential between the standard electrode 2 and the layer 6 of equilibrium is measured between the lead 3 and a measuring electrode 7, accordingly, a superpower corresponding to the activity of the solute element to be measured in the molten iron is obtained by a potentiometer 8.

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