Electrocal, thermal, thermoelectric and related properties of magnesium silicide semiconductor prepared from rice husk

✍ Scribed by S. Bose; H. N. Acharya; H. D. Banerjee

• Publisher: Springer
• Year: 1993
• Tongue: English
• Weight: 820 KB
• Volume: 28
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00367816

✦ Synopsis

Polycrystalline, 10 gm size magnesium silicide was prepared by alloying 99.9% purity polycrystalline silicon obtained from rice husk ash and high-purity magnesium powder. The material in sintered pellet form was characterized for its structural, electrical, thermal, thermoelectric and other properties. A typical sintered pellet exhibited a room-temperature (30 ~ thermoelectric power of 565 gV K -1 and an electrical resistivity of 35 ~ cm. On the other hand, the material was found to be thermally quite stable up to 650~ with a room-temperature thermal conductivity of 6.3 x 1 O-3 cal s-1 cm-1 K-~ (2.6 J s-1 m -~ K-1 ). These properties of the material indicate that the material can find potential applications as a thermoelectric generator and in other semiconductor devices. Furthermore, an indigenous technology for large-scale production of silanes (Sill4) can be developed using this Mg2Si which could be prepared in large quantities by a simple and low-cost process.