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A quick way of making pure iron
Classified Abstracts
116
324-328
36 London Freeze Drying Symposium.
37.
Metallurgy,
Inorganic Chemistry, Analytical Chemistry
31 : 53 324. Carbon arc image furnace : design, construction and evalnation. Gvear Britain. The principle of operation of image furnaces is described and the advantages that they offer in heating materials without contaminating them. Details are given of one design of carbon arc image furnace based on ex-army searchlights. The experiments carried out to evaluate furnace performance are described and the results of some initial experiments on The phenomenon of the carbon thermal etching are presented. arc is summarized and some of the consequences that would follow a Gaussian distribution of intensity at the image are (Author) deduced. P. E. Evans and G. Wildsmith, 1962, 68-73.
Brit. J. Appl. Phys.,
13 (2), Feb.
37 325. Flux measurements in a 150 cm double parabolic arc image furnace. I. A. McGrath and V. Croft, Brit. J. Appl. Phys., 13 (7), July 1962, 369-372. 37 : 53 326. An induction furnace for operations up to 3400°C using well oriented graphite. Great Britain. An induction furnace is described for operating in inert atmospheres at temperatures up to 3400°C. The anisotropy of physical properties of oriented graphite has been applied in the construction of crucible susceptors that can resist rapid temperature changes up to 1000°C set-I. One type of pyrolitic graphite crucible with volume more than 200 ems can be evenly heated to 34OO”C, without external insulation or shielding, using only 15 kW of power. Another type of orientation is utilized in crucibles made from compacted crystallites of natural graphite which are easy to fabricate. A jig for rotational and translational movement of the susceptor facilitates various operations. Thus, by directing a jet of methane on to a rotating heated substrate, specimens of pyrolytic graphite can be grown of large thickness in the c axis (Authors) direction. A. W. Moore, 393-398.
et al., Brit.
J. Appl.
Phys.,
13 (S), Aug.
37 327. Compounds of inert gases. U.S.A. The discovery that the rare gases, xenon
See Abstr. No. 360.
and radon, can be made to react with fluorine was one of the outstanding chemical discoveries in 1962. The electronic structure of these compounds presents problems of great interest and the nature of the bond is still not fully understood. Whilst previous methods of obtaining these fluorides depended on a combination of high pressure and temperature, it is interesting to note that members of the Research Institute of Temple University, Philadelphia, have succeeded in preparing krypton tetrafluoride by reacting 1 volume of krypton with two volumes of fluorine in an electric discharge vessel at liquid air temperature (85°K) and a total pressure of 10 torr. w. J. s. Anon., Chem. & Engng News, 41 (l), 7 Jan. 1963, 47. 37 : 41 328. A quick way of making pure iron. Great Britain. The British Iron & Steel Research Association has developed and patented a new method for the rapid production of moderate amounts of high purity iron. The starting point is fairly pure Swedish iron which is first deoxidized with graphite under an atmosphere of argon. The sulphur is next removed by adding cerium which forms a slag and can be skimmed off. The furnace is then evacuated which causes any excess cerium to evaporate. The metal is finally cast in vacuum. w. J. s. Anon., New Scientist, 17 (325), 7 Feb. 1963, 293. 37 The detection of snlphnr in contamination spots in electron probe X-ray microanalysis. See Abstr. No. 252. Electron diffraction for the magnetic analysis magnetic substances. See Abstr. No. 320. Transactions of the Vacuum Abstr. No. 351.
Metallurgy
37 of any antiferro-
Conference
Stereoscopic viewing of metal foils in an electron See Abstr. No. 310.
38.
Distillation,
1960.
37 See
37 microscope.
Organic Chemistry, Isotopic Gas Analysis 38
1962, Isotope separation by molecular pumps. See Abstr. No. 271.
116
324-328
36 London Freeze Drying Symposium.
37.
Metallurgy,
Inorganic Chemistry, Analytical Chemistry
31 : 53 324. Carbon arc image furnace : design, construction and evalnation. Gvear Britain. The principle of operation of image furnaces is described and the advantages that they offer in heating materials without contaminating them. Details are given of one design of carbon arc image furnace based on ex-army searchlights. The experiments carried out to evaluate furnace performance are described and the results of some initial experiments on The phenomenon of the carbon thermal etching are presented. arc is summarized and some of the consequences that would follow a Gaussian distribution of intensity at the image are (Author) deduced. P. E. Evans and G. Wildsmith, 1962, 68-73.
Brit. J. Appl. Phys.,
13 (2), Feb.
37 325. Flux measurements in a 150 cm double parabolic arc image furnace. I. A. McGrath and V. Croft, Brit. J. Appl. Phys., 13 (7), July 1962, 369-372. 37 : 53 326. An induction furnace for operations up to 3400°C using well oriented graphite. Great Britain. An induction furnace is described for operating in inert atmospheres at temperatures up to 3400°C. The anisotropy of physical properties of oriented graphite has been applied in the construction of crucible susceptors that can resist rapid temperature changes up to 1000°C set-I. One type of pyrolitic graphite crucible with volume more than 200 ems can be evenly heated to 34OO”C, without external insulation or shielding, using only 15 kW of power. Another type of orientation is utilized in crucibles made from compacted crystallites of natural graphite which are easy to fabricate. A jig for rotational and translational movement of the susceptor facilitates various operations. Thus, by directing a jet of methane on to a rotating heated substrate, specimens of pyrolytic graphite can be grown of large thickness in the c axis (Authors) direction. A. W. Moore, 393-398.
et al., Brit.
J. Appl.
Phys.,
13 (S), Aug.
37 327. Compounds of inert gases. U.S.A. The discovery that the rare gases, xenon
See Abstr. No. 360.
and radon, can be made to react with fluorine was one of the outstanding chemical discoveries in 1962. The electronic structure of these compounds presents problems of great interest and the nature of the bond is still not fully understood. Whilst previous methods of obtaining these fluorides depended on a combination of high pressure and temperature, it is interesting to note that members of the Research Institute of Temple University, Philadelphia, have succeeded in preparing krypton tetrafluoride by reacting 1 volume of krypton with two volumes of fluorine in an electric discharge vessel at liquid air temperature (85°K) and a total pressure of 10 torr. w. J. s. Anon., Chem. & Engng News, 41 (l), 7 Jan. 1963, 47. 37 : 41 328. A quick way of making pure iron. Great Britain. The British Iron & Steel Research Association has developed and patented a new method for the rapid production of moderate amounts of high purity iron. The starting point is fairly pure Swedish iron which is first deoxidized with graphite under an atmosphere of argon. The sulphur is next removed by adding cerium which forms a slag and can be skimmed off. The furnace is then evacuated which causes any excess cerium to evaporate. The metal is finally cast in vacuum. w. J. s. Anon., New Scientist, 17 (325), 7 Feb. 1963, 293. 37 The detection of snlphnr in contamination spots in electron probe X-ray microanalysis. See Abstr. No. 252. Electron diffraction for the magnetic analysis magnetic substances. See Abstr. No. 320. Transactions of the Vacuum Abstr. No. 351.
Metallurgy
37 of any antiferro-
Conference
Stereoscopic viewing of metal foils in an electron See Abstr. No. 310.
38.
Distillation,
1960.
37 See
37 microscope.
Organic Chemistry, Isotopic Gas Analysis 38
1962, Isotope separation by molecular pumps. See Abstr. No. 271.