ugg stivali Cesium and cesium compounds _2143

Cesium and cesium compounds

Change Sapporo. (330 ℃ in the presence of oxygen) as bright yellow solid CsO. Superoxide Cs 28O ~ 360 \In addition, the middle oxide generated objects, a further oxide decomposition products csO. Cesium and rubidium compounds Yan 3 cesium sulfate (CsSO.) orthorhombic or hexagonal, colorless crystal, specific gravity 4.243, melting point 1010. It is easy to get sad with the cesium alum, which adds boiling hot barium hydroxide solution, the right foot until all the cesium alum solution until the precipitation of aluminum. Through the alkalinity equivalence point with bromothymol blue (pH7.6) sample is very easy to determine. Filtered to remove barium sulfate and aluminum, aluminum and barium are to test the filtrate. The concentrated solution of fins,[link widoczny dla zalogowanych], which are recrystallized from the water pure cesium sulfate. Cesium alum (aluminum sulfate cesium Cs2SO. · AI: (SO.). · 24H: O) the proportion of 1.97, melting point ll7 ℃, easily crystallized from the aqueous solution, colorless octahedral crystals,[link widoczny dla zalogowanych], each time at 100'C iO0 were dissolved in water about 32 sweet, but in the 5O ℃ solubility as low as 1.5 copies. Alum dissolved alkali is the most difficult. It tends to the first crystallization from solution, while it is easy to use fractional crystallization and lithium, sodium and potassium sulfate Recovering material solubility difference separation of the small, rubidium and cesium sulfone by fractional crystallization from the water is very difficult to separate . Sulfone on the preparation of pure cesium salts of various cesium is an ideal raw material. When using sulfuric acid decomposition of cesium leucite, its Cs sulfone sufficient aluminum content generation. Application of cesium and cesium compounds in cesium are mainly used for the development of ion propulsion and thermal ions, MHD power generation and turbine power generation (see coal MHD,[link widoczny dla zalogowanych], materials and propellants, power generation). NASA (National Aeronautics and Space Administration) has sponsored the development of cesium ion engine. Ion in the ion engine or a propeller, when the ions through the porous tungsten disc heat, the cesium is foggy. Cesium ions accelerated by the electromagnetic field, the ion speed is 483000kph (300000mph) in the electronic injection and is excreted from the propeller, the thrust per unit weight of the propellant exhaust (special impact) N / kg (Ibf / lb) is 70oo ~ 80000 (710 ~ 3060), with the best chemical propellant series more than 5OO ~ 80O (5O ~ 8O). Cesium vapor thermionic converter uses a hot cathode in cesium and the space charge,[link widoczny dla zalogowanych], that is, the anode to the cold electron emission. Approximately 80kw / m: power level of the converter efficiency has been 17. Defecate, the power intensity of 200kw / m. , Can expect the efficiency of up to 30 contractors. For the high temperature (1900 ℃) needs, nuclear heating can be used as energy. For the high temperature, Rankine (Rankine) cycle, the worm gear motors, cesium has been as a possible working fluid. In addition the development of power generation system, cesium is the ideal set of MHD power generation system (see the coal conversion process, MHD). Although the pure cesium or potassium can be used as pure MHD plasma ignition seed, but a cesium potassium mixed species than its individual units are preferable. MHD research fund of the United States, increased from 1971 in 1978 fiscal year was 7 million. U the former Soviet Union more than a 25B plan 20Mw power unit has been operating, the United States has recently shipped a superconducting magnet to the former Soviet Union as a test of the device. Cs is the main industrial applications for the manufacture of vacuum tube getter removed from the pipe as a trace of oxygen and electron emission from the cathode sensor quality boat. Cesium is the use of photoelectric emission photoelectric emission of light energy, caused in cesium cathode electron emission. Photosensitive cesium cathode conductive carrier, such as silver, can be used for the manufacture of optical tube, many of cesium alloys is optical materials. However, in the photosensitive surface of the optical bi-metal material is usually sensitive to the metal alloy instead of asking compounds. Compounds are particularly high SbCs optical sensitivity. Cesium is also used in steam and vapor rectifier glow lamp (mercury arc rectifiers), its role is through the cesium ion is also used as the initiator turned into atoms Cambodia, microwave cesium frequency standards and in accordance with the rotation frequency of electronic applications in the construction of atomic clocks. Trace analysis of cesium salt in meaningful,[link widoczny dla zalogowanych], in the medical kit can be used as tracking the introduction of anti-shock drugs arsenic body. However, physiological studies of cesium, rubidium and potassium, and various organs in animals have shown that compared the role, causing periodic changes in the heart of the interference, the Cs have the greatest effect. Turn create optical crystal, cesium bromide, cesium chloride, cesium fluoride, cesium iodide, cesium hydroxide has been used in biology, organic synthesis of heavy oil addition to alkali and other industries. Lei Han Dong Quoted Kirk-Othiner3rd. ed. VoI5, p327.1980.

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