chemical physics of discharges - Argonne National Laboratory
chemical physics of discharges - Argonne National Laboratory chemical physics of discharges - Argonne National Laboratory
Table 2 Dissociation of NaCl in H2 at 1.0 mn for Various Input Powers t - - 4 *O I 0.240 0 280 I I F'igure 2 shows the effect of carrier gas pressure at constant power. A marimum in metal production occurred at about 1.5 mm pressure. For H2 this pressure coincides closely with the highest concentration of H atoms, and is probably related to the concentration of electrons having sufficient energy to cause dissociation. The reaction rates appeared to be substantially independent of the nature of the carrier gas, The fact that considerable quantities of highly reactive metals are deposited in atmospheres of even more highly reactive gases, namely halogen atoms, suggests that these halogen species may be in the form of negatively charged ions. Such ions, having a complete outer shell of eight electrons, would be non-reactive chemically, and if neutralization of their charges is delayed until they are swept clear of the metal deposit, an explanation of the apparent absence of appreciable back reaction would be afforded. Mass spectroscopic studies are being made on the nature of the species in these discharges to elucidate this matter. The &OUR I1 compounds. The majority of the halides of Be, ldg, Ca, Sr and Ba were investigated. Rates of dissociation did not appear to vary as widely as those of Group I. As optimum conditior.8 were approached for each compound, all the halide vapourized was dissociated and deposits were formed on the W d h of the reriction tube in which metals and dihalides were founO in equi-olar proportions. This points strongly to the formation of unstable monohalide molecules in the discharge, which dis- 'proportionate to yield the observed products. Again the dissociations were not dependent on the carrier gas employed. BeC12, one of the more volatile halides in this group, end one of the most easily dissociated of all the compounds studied, may be broken down in the lower frequency apparatus mentioned previously- Metals could be separated from the dihalidss in the deposits by means of suitable solvents for the letter, or in some cases by vacuupl sublimation of the dihalide.
, ”..’ 3or 25 - 5 20 - s 3 w Y 15- < z’ 1 f 10- I 0 8.0 SODIUM CHLORIDE SUBLIMATION RATE (MMOLE/HR) AT Po0 W
- Page 108 and 109: description for both diffusion and
- Page 110 and 111: B. Ions and Electrons I Consider a
- Page 112 and 113: ' 112 axial diffusion through the d
- Page 114 and 115: the tube walls occurs continuously
- Page 116 and 117: E2R M ' $6"
- Page 118 and 119: 1. 2. 3. 4. 5. 6. 7. 8. 9- 10. u. -
- Page 120 and 121: 120 . Dlschorge zone Reactor zone 1
- Page 122 and 123: 122 In radiation chemistry the cust
- Page 124 and 125: 124 4. chemistry seem limited essen
- Page 126 and 127: 126 Conversion of Mixtures into Mor
- Page 128 and 129: Hydrazine Synthesis in A Silent dle
- Page 130 and 131: {;I . - . .. . - .., . . .. _- .. .
- Page 132 and 133: 1 \ \ \ , \ , \ \ Pmer hnrity K.W.
- Page 134 and 135: . I operating fact that the sloGe i
- Page 136 and 137: _- of ' . 8. - 7 6, Residence Time
- Page 138 and 139: 135 Ionic Reactions in Corona Disch
- Page 140 and 141: GAS OUT GAS IN i.ho QUADRUPOLE MASS
- Page 142 and 143: - + ( ~ ~ + 0 H ) ~ O ~ ( H~o)~H+ +
- Page 144 and 145: 144 i I , , , , . + 1- u 3c w Inu c
- Page 146 and 147: 146 SYNTHESIS OF ORGANIC COIGhTDS B
- Page 148 and 149: mi5 a- dz CI n I a I n +4 - 0 -I- k
- Page 150 and 151: 0 z cu I I I
- Page 152: I- I - t d m a .rl Y x c, t-' d k
- Page 155 and 156: , 155 This result is significant in
- Page 157: Compound Bond he rgy Li I 82 UBr 10
- Page 161 and 162: I 161 THE GLOW DISCHARGE DEPOSITION
- Page 163 and 164: Fig. 1 Process Apparatus -__l.ll__
- Page 165 and 166: v) t- at- InIo Io0 t-Q) loo lcua O
- Page 167 and 168: This study is only an approximation
- Page 169 and 170: Mole Reaction Material ratio time e
- Page 171 and 172: \ i (4) Effect of System Pressure T
- Page 173 and 174: 173 Pressure. Since pressure is a c
- Page 175 and 176: 175 Table VI X-RAY DATA OF DEPOSIT
- Page 177 and 178: 177 Another source of weakness is t
- Page 179 and 180: 179 PLATING IN A CORONA DISCHARGE R
- Page 181 and 182: \ 3 , ,\ 110 v 60 CPS MANOMETER . F
- Page 183 and 184: I i , \ I i & a - P Fig. 3 Reaction
- Page 185 and 186: \ \' C 0 .d * d .- C U d 0) c( 1) L
- Page 187 and 188: I i I . Q) I, s w 0 v) Y 0 a w W a
- Page 189 and 190: I (b) Polarized Light Fig. 6 Cross
- Page 191 and 192: i m v) Y C i! u o) 23 a a- + 191 m
- Page 193 and 194: i, d C .d c c W Q ) 0 0 L1Y 0 000 0
- Page 195 and 196: i e 4 0 wcr -4 4 al 0 0 0 c) cr 13:
- Page 197 and 198: \ E ‘ 1 TIME FOR RUN 13-1 14-1 -
- Page 199 and 200: 199 a red heat in this cell using d
- Page 201 and 202: \ , t j \ I, v) 2 Y . C 0 u m .I C
- Page 203 and 204: 203 VAPOR PHASE FORMATION OF NONCRY
- Page 205 and 206: BELL JAR STANC TO VACUUM SYSTEM U T
- Page 207 and 208: 207 of the boron oxide film, the fi
,<br />
”..’<br />
3or<br />
25 -<br />
5 20 -<br />
s<br />
3<br />
w<br />
Y 15-<br />
<<br />
z’<br />
1<br />
f 10-<br />
I<br />
0 8.0<br />
SODIUM CHLORIDE SUBLIMATION RATE (MMOLE/HR) AT Po0 W
Change language