4,579 research outputs found
Problems and Prospects of raw materials for ferro mangan-ese industry with special reference to manganese ores
This paper deals with the various problems of raw material resources, grade and ferro manganese production in the country. Methods such as exploration of new resources, blending and beneficiation of low-grade ores and reduction in consumption of Fe-Mn for steel production have been suggested for proper utilisation and conservation of mang-anese ore reserves
Perspectives from a developing nation with special reference to rural areas
This article does not have an abstract
Studies on Hall Effect and DC Conductivity Measurements of Semiconductor Thin films Prepared by Chemical Bath Deposition (CBD) method
Semiconductors have various useful properties that can be exploited for the realization of a large number
of high performance devices in fields such as electronics and optoelectronics. Many novel semiconductors,
especially in the form of thin films, are continually being developed. Thin films have drawn the attention
of many researchers because of their numerous applications. As the film becomes thinner, the properties
acquire greater importance in the miniaturization of elements such as resistors, transistors, capacitors,
and solar cells. In the present work, copper selenide (CuSe), cadmium selenide (CdSe), zinc selenide
(ZnSe), lead sulphide (PbS), zinc sulphide (ZnS), and cadmium sulphide (CdS) thin films were prepared by
chemical bath deposition (CBD) method. The prepared thin films were analyzed by using Hall measurements
in Van Der Pauw configuration (ECOPIA HMS-3000) at room temperature. The Hall parameters
such as Hall mobility of the material, resistivity, carrier concentration, Hall coefficient and conductivity
were determined. The DC electrical conductivity measurements were also carried out for the thin films using
the conventional two β probe technique. The activation energies were also calculated from DC conductivity
studies
- β¦