ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Chalcogenide glasses have been synthesized rapidly by heating the constituents at temperatures in the range 1000 to 1500° C under high pressure argon in internally heated pressure vessels. Some glasses of molecular constitution As2Se3Mnx, and glasses of the Ovshinsky type, e.g. As30Te48Ge10Si12, have been made by this method. The conductivities of the glasses prepared have been measured at temperatures up to about 1200° C, an atmosphere of high pressure argon being employed to suppress volatilization. The liquid glasses were found to change from semiconductors to metallic-type conductors as the temperature was raised. The technique of conductivity measurement has been applied to liquid tellurium to obtain data up to temperatures beyond the normal boiling point. The conductivity was found to increase with temperature to a maximum at around 900° C, and thereafter to diminish. At the highest temperatures, where the liquid can be regarded as virtually metallic, the resistivity was found to show approximately a positive linear dependence of temperature.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00552828
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