Measurements of thermal conductivity variations with temperature for the organic analog of the nonmetal-nonmetal system: Urea-4-bromo-2-nitroaniline


Bayram Ü. , ÖZTÜRK E., Aksoz S., Marasli N.

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, vol.44, no.9, pp.4051-4058, 2013 (Journal Indexed in SCI Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 44 Issue: 9
  • Publication Date: 2013
  • Doi Number: 10.1007/s11661-013-1751-6
  • Title of Journal : Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
  • Page Numbers: pp.4051-4058

Abstract

Thermal conductivity variations with temperature for solid phases in the Urea (U)-[X] mol pct 4-bromo-2-nitroaniline (BNA) system (X = 0, 2, 45, 89.9, 100) were measured using the radial heat flow method. From graphs of thermal conductivity variations with temperature, the thermal conductivities of the solid phases at their melting temperature and temperature coefficients for the U-[X] mol pct BNA system (X = 0, 2, 45, 89.9, 100) were found to be 0.26, 0.55, 0.46, 0.38, 0.23 W/Km and 0.007781, 0.005552, 0.002058, 0.002188, 0.002811 K -1 , respectively. The ratios of thermal conductivity of the liquid phase to thermal conductivity of the solid phase in the U-[X] mol pct BNA system (X = 0, 2, 45, 89.9, 100) were also measured to be 0.30, 0.44, 0.46, 0.49, 0.51, respectively, with a Bridgman-type directional solidification apparatus at their melting temperature. © 2013 The Minerals, Metals & Materials Society and ASM International.