Archive for the ‘Lithium’ Category
Thursday, March 22nd, 2007
Basic aluminum sulfate can be prepared by homogeneous precipitation starting from admixtures of ammonium aluminum sulfate and ammonium bisulfite solutions. Powder agglomeration problems usually arise in wet precipitation processes mainly at high concentration of precursors. Some organic additives have been used in order to modify the physical and chemical properties ...
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Thursday, March 22nd, 2007
Electrochemical lithium insertion have been studied in the alkaline phosphate tungsten bronze K2P4W12O44 through galvanostatic and potentiostatic techniques. The maximum amount of lithium inserted, near to 14 lithium ions per formula, leads to a specific capacity of 120 Ah/kg when the cell was discharged until 1.0 V vs Li+/Lio. Nevertheless, ...
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Thursday, March 22nd, 2007
Phosphate tungsten bronzes with general formula Ax(PO2)4(WO3)8 (A= Na, K; x= 0.8 and 1.5) have been tested as cathodes in electrochemical lithium insertion cells. Through galvanostatic and potentiostatic intermittent techniques the different processes which take place in the cathode during the discharge of the cell were analysed. In general, the ...
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Thursday, March 22nd, 2007
In ceramics, the addition of a flux lowers the melting point of the body or glaze. In particular they affect the melting point of silica (SiO2), which melts to form a glassy phase during firing/sintering which bonds the ceramic body or forms the basis of a glaze. The addition of ...
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Thursday, January 12th, 2006
Aluminum-lithium alloys have been developed primarily to reduce the weight of aircraft and aerospace structures. More recently, they have been investigated for use in cryogenic applications.
The major development work began in the 1970-1980, when aluminum producers accelerated the development of aluminum-lithium alloys as replacements for conventional airframe alloys. The lower-density ...
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