Pb0, Naz。 を含む溶融ケイ 酸塩の電気伝導度測定*
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1. Wien Rw 5 Rn Rsoa 4dR 5 4 6 g 6 z 0 5 1 Wig 3 e 10 mmx10 mm 2 4 2 4000 wF Fig 3 a d CaO SiO PbO SiO KC1 0 1DKCl 6 CaO SiO KC1 0 1 DKC12. 0 1DKC1 KNO KC1 3 15 30 C 350 500 SC 800 900 C C 1 Fig 4 Fig 5 Fig 4 Measuring circuit Osc Oscillator Att Attenator Amp Amplifier Det Detector Syn SynchroScODe Rc OSc 10mV 5 YEW Z 13 A 200 pF 11 111 F 4 20 Hz 20 KHz
3. I 1 Research Institute of Mineral Dressing and Metallurgy Tohoku Uni versity Sendai 1968 9 Z 1 Z V I V 2 1 o2C2 Y 1 tan2 9 sec 1 9 2 2 tan 1 pCZ 2 7 9 1 9 FR
4. Fig 1 b 2 Cell Ce Cell a b c Fig 1 Several types of the bridge circuit 1 25 1957 27 29 1961 722 4 c Fig 1 c Table 1 Relation between and Z in various electrolytes calculation Electrolyte Ca Rs a Electrode gF ohm 0 R Z Error Aqueous solution a Platinized Pt 1000 10 0 53 0 9999 0 01 Aqueous Solution 5 70 24c307 0 910 9 Smooth Pt Fused salt Smooth Pt 10 100 9 0 9881 2 2 Molten slag Smooth Pt 100 0 5172 30 0 299 70 1 Table 1 L WV 1
5. 4R 4R Fig 10 1100C Present work f m Present work f 1KHsz Kroger Weisgerber Mori Matsushita Bockris et al Endel Arimori et al mol g 0 Fig 10 Electrical conductiVity vs NNazO mol percent in Na O SiO system at 1100 C 290 1 KHz 1 KHz C 0 883 1 KHz 709 15 K Endel and J Hellbrugge Glastech Ber 20 1942 16 277 16 5 1962 785 17 38 1952 283 18 3 1953 96 1 KHz i
6. Bockris Mellorsan 0 8KHz 1TKKHZ 4R 4X 1 KHz KC1 4R PbO Si10 4 2X 4 1KHz Fig 7 PbO
7. Rm 5 6 0 4KHz 6KHz 2 1 1KHz 4 Fig 9 4 40 Na 0 60 SiO 1300 11 J O M Bockris and G W Mellors J Phys Chem 60 1956 1321 12 72 1956 457 13 53 1967 No 10 S 260 14 43 4 PbO Na O 503 4 XX 5 4 e 493 Mg 0 50Z570 7g 0 40 og 0 605 0z mo ohm 0 00 00 7 200 i1300 1400 Temperature Fig 9 Relation between 4R and temperature meaSured at 1 KHz
8. 2X 10 V 1090 C 1 20 1000 C 4R 40 KHz KC1 0 1 DKC1 IV PbO S0 Fig 3 6 z 0 5 0 8 1 KHz 3KHz 4 KHz
9. IT 7 S 7 _ 7 8 52 1966 580 3 R 1 k UW S C k 7 C S 8 C k R 8 mm R R Rm R Rs R 9 C C 10 k C Rms Re 11 C KCI
10. gF C IL 2 b 2 Cm Rm Fig 2 a4 Rn Cm a b Fig 2 Equivalent circuit for slag metal interface Rw Cm Measured resistance and capaci tance Rol Solution Res
11. 9 10 255 502 3 KHz ig 7 Temperature 00 1000 900 800 100 Pb0O mol log K e Present Ok f Present work f i Bockris Mellors Ito Yanagase Saito Goto Someno 3 70 80 90 98 7 x102 Fig 7 Electrical conductivity vs reciprocal of absolute temperature in PbO SiO system 66 X Oo log K e Present work f Present work f 3KH o Bockris Mellors x Tto Yanagase A Saito Goto Someno Ejima Watanabe Kameda 30 40 50 60 70 80 90 100 Pb0 mo7 Fig 8 Electrical conductivity vs PbO mol percent in PbO SiO system at 900 C PbO 4R PbO log 1 7 1969 33 i
12. KCl 20 30 C KNO 350 500 C KC1 840 900 C 3 PbO SiO NazO SiO 4 40 Na O 60 SiO mo1 1100 1300 C 19 C Kroger und P Weisgerber Z Phys Chem Neue Forge 18 1958 90
13. 99 db 4 8 N Hig 5 35 mm 55 mm Pt 10 Rh 1mmeg 2 12 mm 35 Fig 5 Conductivity cell A Alumina tube 10 mm O D 6 mm I D 4mm g 2 0O 1DKO1 B Alumina tube O D 2 mm I D 1 mm KCI 7 4789 g 1000 mL 0 1 DKC1 F
14. KC1 10 mm Ci 3 88 C2 3 46 Fig 6 a b c KCl gt 7 KHz KC1 1 KHz 1 KHz IL 3 Hig 3 Fig 3 a 2
15. 7 4 TE Pt platinized 24 2 C W 0 2 3 O 6 4 2 f gt 2 04 6 8 10 f Fig 3 Apparent resistance as a function of frequency KC1 Fig 3 e 1 KHz 1 KHz 1 KHz Fig 3 a d 4 1 KHz 4R
16. 1 PbO SiO lt 0 5 0 8 4X 4 6 3 4 M Wien Wied Ann 58 1896 37 5 G Jones and S M Christian J Amer Chem Soc 57 1935 272 6 M Shaw and E Remick J Electrochem Soc 97 1950 324 500 1969 33 3 4 a 30 e ON 2 55CoO 45570 wt A lt 8 a 1531 C 26 a b 75 7 I 0 KCL salt Z4 9 5 Cj S 08 E oe 72 S 93 KO 04 Pt smooth 27 8 O o 69 2 2 20 2 60 Pb0 405i0 mol 6 70Z0 2 hl 1 6 070 KCI
17. 4 39 7 PbO 60 3 SiO 3 KHz 39 7 PbO 60 3 SiO 4R 2PDbO SiO Bockris PbO SiO 2 PbO SiO 4R 2 V NaO SiO0
18. 498 969 33 PbO NazO Masahiro Ashizuka and Masayasu Ohtani Conductivity of Silicate Melts Containing PbO and Na O The Measurement of the Electrical The electrical conductivity of molten slag was measured by many researchers but their results are not always consistent Reinvestigation is therefore necessary to clarify the reason of disagreemlent The results obtained are as follows 1 The true resistance of the electrolyte Rr was calculated by the equation Rw Rr 4dR where Rn 1S the measured resistance which z is nearly 1 0for 0 1D KCIl aq from 0 5 to 0 8 for PbO SiO melts the extrapolation to infinite frequency dR depends on the frequency f in the relation dR og 1 f in solution KNO and KC1 salts Therefore the true resistance of the melts is obtained only by Na O SiO meltS and varies 2 The cell constants measured at 15 30 C 350 500 C and 850 900 C with 0 1D KCl aq solution KNO salt and KC1 salt respectively were nearly equal within the experimental error 3 For PbO SiO melts the effect of 4R on the electrical conductivity is remarkable with the increase of PbO concentration and temperature Log k did not show a linear relation with 1 7 in the range of low PbO concentrations 4 The electrica1 conductivity of Na O SiO me
19. g 1 c Fig 11 Temperagture 7409 350 300 250 200 59 1100 0 5 re 493 0 507 Sig ri x O O O S 5 60 i0 0 se 2 4g ZO a 29 75 5 05 60 6 5 70 Z4 7 04 Fig 11 Electrica1 conductivity vs reciprocal of absolute temperature in Na O SiO system 12 27 0 4e 202 12 1300 C Ar 500 cc min 1500 cc min 1100 C DD VI 1 4R 4Xe1 z 1 PbO SiO lt 0 5 0 8 2
20. ig 3 c 1 KHzZ Fig 6 2 cm 2 cm 4cm C Pt rod 1mm D Pt crucible _ TI D 35 mm H 55 mm 9 C aq soln 1 em S09 b KNO salt A S08 I ON fF Css0872 0029 ww 0 9 08 07 82 0 840 860 880 900 9229 940 Temperature CC Fig 6 Cell constant measured with 0 1DKC1 aq soln KNO salt and KCl salt PbO Na O 501 3 KNO 400 C KC1 850 C KNO KCI KCl Fig 3 2 Fig 6 b c KNO KCl
21. istance Cg double layer capacitance ZF Faradaic Impedance 2 PbO NazO 499 ig 2 4 Rm sal Cm 2 Ca 3 C g 02 in slag CO g 2e 3 2 Cz Zr Fig 3 b F Fig 2 b RR Cm Ra R 1 1 eo2C3 1 4 1 2C2 Rs Ca 3
22. lts obtained by the extrapolation to infinite fre quency was hipher than those of previous researchers and the result at 1 KHz was almost similar to that of Mori Matsusita There was no effect of atmospheres of the cell on the electrical conductivity for the slags used Received November 14 1968 1 cell constant
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