Thermal properties of polycrystalline NdN bulk samples with various porosities

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• 作者：Jun Adachi ; Masahito Katayama ; Ken Kurosaki ; Masayoshi Uno ; Shinsuke Yamanaka
• 关键词：GEO space debris ; Space debris observations ; Image processing ; PSF fitting ; CCD astrometry
• 刊名：Journal of Nuclear Materials
• 出版年：2008
• 期刊代码：51_00223115
• 类别：ms
• 出版时间：15 May 2008
• 卷：376
• 期：1
• 页码：83-87
• 文件大小：386 K

摘要

Neodymium mononitride (NdN) pellets with various porosities were prepared by a spark plasma sintering (SPS). The thermal expansion, specific heat capacity and thermal conductivity were measured and compared with those of uranium mononitride (UN), because NdN exists in the irradiated nitride fuels. The thermal expansion and specific heat capacity of NdN were very similar to those of UN. The thermal conductivity of the porosity-free NdN was estimated from the porosity dependence of the thermal conductivity. Unlike the case of the thermal conductivity of UN, that of NdN decreased with increasing temperature.