Topic
Caesium chromate
About: Caesium chromate is a research topic. Over the lifetime, 7 publications have been published within this topic receiving 106 citations.
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04 Feb 1963TL;DR: In this paper, the authors describe the cathode of a glow-discharge tube as a surface layer containing gold, CsAu and an oxide of caesium.
Abstract: 937,391. Cathode materials and processing. MULLARD Ltd. Feb. 14, 1962, No. 5666/62. Class 39 (1). The cathode of a glow-discharge tube has a surface layer containing gold, CsAu and an oxide of caesium. The cathode may comprise a cylinder 5 of molybdenum or nickel, or a glass support coated with molybdenum or tin oxide, or a gold strip. As shown, a gold wire filament 9 is wound on a platinum-coated molybdenum wire 7 which may constitute the anode. Alternatively, the anode may comprise a rod 10 alone, or a ring 17 supported on rod 10. During manufacture, the tube is heated to 350‹ C. and exhausted through stem 4. The electrodes are outgassed by passing a current through filament 7 and inductively heating cathode 5. A further tube, containing a compressed powder mixture of 2 parts silicon to 1 part of caesium dichromate, or 1 part silicon to 1 part of caesium chromate, is joined to stem 3, and the mixture is heated to cause caesium to be deposited on the walls of this tube. The gold 9 is then evaporated in vacuo or in neon at low pressure and deposited on the cathode 5. After exhaustion, caesium is distilled from the further tube so as to react with the gold cathode layer, by heating at 100 ‹ C. until photo-emission from the cathode reaches a maximum, e.g. about 1¢ hours. After sealing off stem 3, and admitting neon at 10 mm. of Hg, a discharge current of 10 mA. is passed between cathode 5 and anode 17 and pure oxygen is slowly admitted until the maintaining voltage of the discharge is a minimum, e.g. 31 to 33 v., or until thermionic emission from the cathode at 100‹ C. in the absence of neon is a maximum. Finally the tube is again exhausted and refilled with neon at 5 to 20 e.g. 10, mm. of Hg, or with helium at 3 to 20 mm. of Hg.
34 citations
TL;DR: In this article, the corrosion of the alloys PE16 and M316 by Cs : Te mixtures (1:1, 2:1 and 4:1) has been studied in sealed capsules under partial pressures of O2 set by metal/metal oxide couples at 948 K for 168 h.
20 citations
TL;DR: In this article, the corrosion of the alloys PE16, M316 and FV448 by liquid caesium in sealed capsules has been studied after 168 h at 948 K in the presence of a buffer of Ni/NiO which set the thermodynamic oxygen potential at ΔGO2 = − 307 kJ mol -1 O2.
17 citations
TL;DR: In this article, the molar enthalpies of solution at infinite dilution Δ sol H m ∞ (298.15 K) for CsI and Cs 2 CrO 4 were measured using an isoperibol calorimeter.
15 citations
TL;DR: In this article, the authors used transpiration and boiling temperature data to calculate partial pressures of monomeric (p 1 °) and dimeric (p 2 °) species over CsI(1) and the values obtained can be represented by the following equations: log 10 P 1 °(kPa ) = (19.67 ± 0.12) − 0.00113 T (K ) − (10301 ± 95)/ T ( K ) − 21088/ T 2 (K) + 1.13 log 10 T(K ) + 0.
14 citations