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184. The oscicator, a new flow coater.
Abstracts 183--195 44
183. Applying Decorative Effects to Molded Plastics. W. H. Rohr, Industrial Finishing, 22-42, Nov. 1959. 44
184. The Oscieator, a New Flow Coater. An entirely new concept of flow coating. Low solvent loss and any part or piece that can be power machine washed can be flow coated. Old flow coaters may be converted to the new type with a conversion package. Color changes are simple and fast. E. A. Zahn, IndustrialFinishing, Oct. 1959.
289
(ii) It is desirable to flash the getter quickly in order to deposit a porous layer. It is concluded that the use of titanium as a flash getter gives significantly lower residual pressures in most sealed off vacuum envelopes. Letter by R. L. Stow, Nature, 184, Suppl. No. 8, 542-543, 15 Aug. 1959. 47
188. Vapor Pressure of Thorium Tetrafluoride. Note by A. J. Darnell and F. J. Keneshea, Jr., J. Phys. Chem., 62, 1143-1145, Sept. 1958. 47
45.
Soldering, Welding and Brazing 45
185. Copper Welding for Maximum RF Conductivity. E. F. McLaughlin, Rev. Sci. lnstrum., 30, 372.
189. Vapor Pressures and Molecular Composition of Vapors of the RbF-ZrF4 and LiF-ZrF4 systems. K. A. Sense and R. W. Stone, J. Phys. Chem., 62, 1411-1418, Nov. 1958. 47
46.
Glass Blowing, Glass-to-metal and Ceramic-to-metal Sealing Techniques 46
186. Metal-Glass Vacuum Seal for Use at Low Temperatures. N. de Haas, Rev. Sci. lnstrum., 30, 594.
190. Vaporization Characteristics of p-Dibromobenzene. United States. Vapor pressures of p-dibromobenzene have been measured in the temperature range --45 to 74 ° using effusion, gas saturation and static techniques : log Patm = --3850T-/ -8.80. Condensation coefficients, estimated from effusion pressure dependence on cell geometry, range from near unity at the lowest temperatures to ca. 0.025 at 13 °. (Author) J. H. Stern and N. W. Gregory, J. Phys. Chem., 63, 556-559, April 1959.
47.
Outgassing Data, Vapor Pressure Data, Gettering Data
47 187. Titanium as a Gettering Material. United States. It was found that barium getters would not hold a cathode ray tube at a pressure much lower than 10 -8 torr. An investigation of titanium metal as a getter material was carried out. An ion pump was first used. This pump consisted essentially of an electron emitting tungsten source, an accelerating grid and a negatively charged titanium coating which could trap and absorb positively charged particles. The titanium film was evaporated from a heavy tungsten filament. However it was found that a comparable pumping action could be obtained merely by the use of a wall coating of titanium metal without the use of the ion-forming system (pressures were measured using a Penning gauge). The superior gettering power of titanium was demonstrated by making two identical tubes of " Pyrex " each containing one getter material. Each tube was connected to an ion gauge. After outgassing for 1 hr at 350°C the system was sealed off at 5 × 10 -5 tort. The tube containing barium was fired and the pressure fell to 6 x 10 -7 torr but the tube containing titanium fell to 2 x 10 -s torr (probably limited by the gauge). The ion gauge was in operation during the experiments and its pumping action was an embarrassment to accurate measurement. A second series of experiments were carried out using gauges of the Alpert type. Two tubes complete with electron gun and phosphor screen one containing a conventional barium getter, the other containing a titanium getter were given identical treatment. They were sealed and disconnected from a common pumping system at a pressure of 3 x 10 -5 torr after a short outgassing period at 325°C. After 30 days the pressures were measured and the getters were fired. The pressure measurements were recorded on a diagram which shows pressure against time for the two tubes. The results show a marked superiority of the titanium except when a very large amount of gas was liberated by strongly over running the cathode filament. In this case similar results were obtained. As a result of this work two important points have been determined. (i) Oil vapour seems to poison titanium films to a greater extcn.t than barium films.
47
191. Method for Rapid Determination of Vacuum Outgassing Rates. Ivory P. S. Fish, Rev. Sci. Instrum., 30, 889. 47 192. An Investigation of Some Vaecum Properties of Epoxy
Resins. E. A. Kolenko and V. G. Iurev, Soy. Phys. Tech. Phys., 3 (Transl.), 2073.
The Structure of Gas-Adsorbent Carbons.
47:16 See Abstract No. 44. 47:17 See
Dissociation Pressure and Stability of Beryllium Carbide. Abstract No. 61.
47:17 See
The Vaporization of Molybdenum and Tungsten Oxides. Abstract No. 64.
49.
Miscellaneous Materials and Techniques 49
193. Translucent Phosphor Coatings in High-Pressure MercuryVapor Lamps. C. H. Haake, J. Electrochem. Soe., 106, 866-870, Oct. 1959. 49
194. Molybdenum Disulfide of High Surface Area. Note by F. T. Eggertsen and R. M. Roberts, J. Phys. Chem., 63, 1981-1982, Nov. 1959. 49 195. Electrical Conductivity of Single Crystals of MgO. The electrical conductivity of magnesium oxide at temperatures in the region of 1300°C is observed to depend upon the partial pressure of oxygen surrounding the sample. The conductivity increases at oxygen pressures both higher and lower than 10 -5
183. Applying Decorative Effects to Molded Plastics. W. H. Rohr, Industrial Finishing, 22-42, Nov. 1959. 44
184. The Oscieator, a New Flow Coater. An entirely new concept of flow coating. Low solvent loss and any part or piece that can be power machine washed can be flow coated. Old flow coaters may be converted to the new type with a conversion package. Color changes are simple and fast. E. A. Zahn, IndustrialFinishing, Oct. 1959.
289
(ii) It is desirable to flash the getter quickly in order to deposit a porous layer. It is concluded that the use of titanium as a flash getter gives significantly lower residual pressures in most sealed off vacuum envelopes. Letter by R. L. Stow, Nature, 184, Suppl. No. 8, 542-543, 15 Aug. 1959. 47
188. Vapor Pressure of Thorium Tetrafluoride. Note by A. J. Darnell and F. J. Keneshea, Jr., J. Phys. Chem., 62, 1143-1145, Sept. 1958. 47
45.
Soldering, Welding and Brazing 45
185. Copper Welding for Maximum RF Conductivity. E. F. McLaughlin, Rev. Sci. lnstrum., 30, 372.
189. Vapor Pressures and Molecular Composition of Vapors of the RbF-ZrF4 and LiF-ZrF4 systems. K. A. Sense and R. W. Stone, J. Phys. Chem., 62, 1411-1418, Nov. 1958. 47
46.
Glass Blowing, Glass-to-metal and Ceramic-to-metal Sealing Techniques 46
186. Metal-Glass Vacuum Seal for Use at Low Temperatures. N. de Haas, Rev. Sci. lnstrum., 30, 594.
190. Vaporization Characteristics of p-Dibromobenzene. United States. Vapor pressures of p-dibromobenzene have been measured in the temperature range --45 to 74 ° using effusion, gas saturation and static techniques : log Patm = --3850T-/ -8.80. Condensation coefficients, estimated from effusion pressure dependence on cell geometry, range from near unity at the lowest temperatures to ca. 0.025 at 13 °. (Author) J. H. Stern and N. W. Gregory, J. Phys. Chem., 63, 556-559, April 1959.
47.
Outgassing Data, Vapor Pressure Data, Gettering Data
47 187. Titanium as a Gettering Material. United States. It was found that barium getters would not hold a cathode ray tube at a pressure much lower than 10 -8 torr. An investigation of titanium metal as a getter material was carried out. An ion pump was first used. This pump consisted essentially of an electron emitting tungsten source, an accelerating grid and a negatively charged titanium coating which could trap and absorb positively charged particles. The titanium film was evaporated from a heavy tungsten filament. However it was found that a comparable pumping action could be obtained merely by the use of a wall coating of titanium metal without the use of the ion-forming system (pressures were measured using a Penning gauge). The superior gettering power of titanium was demonstrated by making two identical tubes of " Pyrex " each containing one getter material. Each tube was connected to an ion gauge. After outgassing for 1 hr at 350°C the system was sealed off at 5 × 10 -5 tort. The tube containing barium was fired and the pressure fell to 6 x 10 -7 torr but the tube containing titanium fell to 2 x 10 -s torr (probably limited by the gauge). The ion gauge was in operation during the experiments and its pumping action was an embarrassment to accurate measurement. A second series of experiments were carried out using gauges of the Alpert type. Two tubes complete with electron gun and phosphor screen one containing a conventional barium getter, the other containing a titanium getter were given identical treatment. They were sealed and disconnected from a common pumping system at a pressure of 3 x 10 -5 torr after a short outgassing period at 325°C. After 30 days the pressures were measured and the getters were fired. The pressure measurements were recorded on a diagram which shows pressure against time for the two tubes. The results show a marked superiority of the titanium except when a very large amount of gas was liberated by strongly over running the cathode filament. In this case similar results were obtained. As a result of this work two important points have been determined. (i) Oil vapour seems to poison titanium films to a greater extcn.t than barium films.
47
191. Method for Rapid Determination of Vacuum Outgassing Rates. Ivory P. S. Fish, Rev. Sci. Instrum., 30, 889. 47 192. An Investigation of Some Vaecum Properties of Epoxy
Resins. E. A. Kolenko and V. G. Iurev, Soy. Phys. Tech. Phys., 3 (Transl.), 2073.
The Structure of Gas-Adsorbent Carbons.
47:16 See Abstract No. 44. 47:17 See
Dissociation Pressure and Stability of Beryllium Carbide. Abstract No. 61.
47:17 See
The Vaporization of Molybdenum and Tungsten Oxides. Abstract No. 64.
49.
Miscellaneous Materials and Techniques 49
193. Translucent Phosphor Coatings in High-Pressure MercuryVapor Lamps. C. H. Haake, J. Electrochem. Soe., 106, 866-870, Oct. 1959. 49
194. Molybdenum Disulfide of High Surface Area. Note by F. T. Eggertsen and R. M. Roberts, J. Phys. Chem., 63, 1981-1982, Nov. 1959. 49 195. Electrical Conductivity of Single Crystals of MgO. The electrical conductivity of magnesium oxide at temperatures in the region of 1300°C is observed to depend upon the partial pressure of oxygen surrounding the sample. The conductivity increases at oxygen pressures both higher and lower than 10 -5