石墨化率不同的自焙炭块的热膨胀

来源期刊：中国有色金属学报1996年第3期

论文作者：薛向欣 黄晓煜 段培宁 张殿有

文章页码：29 - 32

关键词：自焙炭块 石墨化率 热膨胀系数 拉杆式膨胀仪 弹性模量

Key words：self-baking carbon block　graphitization degree　thermal expansion coefficient　dilatometer modulus of elasticity

摘    要：采用精密垂直拉杆膨胀仪在14~1000℃范围内测量了具有不同石墨化率的自焙炭块的相对热伸长量，并由此获得了热线膨胀系数α。结果表明:石墨化率一定时，α值在较低温度下随温度升高而增加，在较高温度下，α值随温度变化不明显；恒温时，石墨化率越高，α值越低。讨论了单位热应力下的弹性模量概念。

Abstract: Relative thermal expansions,ΔL/L0,of self-baking carbon blocks with different graphitization degree were measured by using a precise vertical pull-rod dilatometer within temperature range of 14~1000℃, based on which the linear thermal expansion coefficients,α,of the carbon blocks were obtained. Results showed that the value ofαincreased with increasing temperature at a given graphitization degree; the higher the graphitization degree, the lower the value ofαat a given temperature. Thermal elastic moduli of the carbon blocks were discussed.