Published May 2011 | Version v1
Journal article Metadata-only

Effect of Na Addition on Electric Properties of Ca2Si Sintered Compacts

Creators

  • 1. Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8011 (Japan)
  • 2. Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8561 (Japan)
  • 3. Industrial Research Institute of Shizuoka Prefecture, 1-3-3 Shin-Miyakoda, Kita-ku, Hamamatsu 431-2103 (Japan)
  • 4. Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku, Naka-ku, Hamamatsu 432-8011 (Japan)
  • 5. FDK Corporation, 2281 Washizu, Kosai 431-0495 (Japan)

Description

Ca2Si powders have been synthesized by the thermal treatment of Mg2Si with NaI or Na2CO3 under Ca vapors, then sintered into compacts by sparking plasma sintering (SPS) technique. As a comparison, the compact was also sintered using Ca2Si with NaI powders by the SPS technique. The effect of Na addition on the structural, transport and thermoelectric properties of the Ca2Si compacts has been examined. All the samples show a p-type behavior in the measured temperature range. The Ca2Si with Na2CO3 by vapor phase growth shows a higher carrier concentration of 1.28x1018 cm-3 conductivity about 10 times higher than Ca2Si, and a power factor about 5 times higher than Ca2Si from 350K to 570K.

Availability note (English)

Available from http://dx.doi.org/10.1088/1757-899X/18/14/142014

Additional details

Identifiers

DOI
10.1088/1757-899X/18/14/142014;

Publishing Information

Journal Title
IOP Conference Series. Materials Science and Engineering (Online)
Journal Volume
18
Journal Issue
14
Journal Page Range
[4 p.]
ISSN
1757-899X

Conference

Title
3. international congress on ceramics
Acronym
ICC3
Dates
14-18 Nov 2010
Place
Osaka (Japan)

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
43019618
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
CALCIUM SILICIDES; COMPACTS; HEAT TREATMENTS; MAGNESIUM SILICIDES; POWDERS; POWER FACTOR; SINTERING; SODIUM CARBONATES; SODIUM IODIDES; THERMOELECTRIC PROPERTIES; VAPORS
Descriptors DEC
ALKALI METAL COMPOUNDS; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CARBON COMPOUNDS; CARBONATES; DIMENSIONLESS NUMBERS; ELECTRICAL PROPERTIES; FABRICATION; FLUIDS; GASES; HALIDES; HALOGEN COMPOUNDS; INORGANIC PHOSPHORS; IODIDES; IODINE COMPOUNDS; MAGNESIUM COMPOUNDS; OXYGEN COMPOUNDS; PHOSPHORS; PHYSICAL PROPERTIES; SILICIDES; SILICON COMPOUNDS; SODIUM COMPOUNDS