不同受热温度下炭化红松表面微观形貌和成分分析  

Surface Microtopography and Elements of Korean Pine Carbonizations at Different Heating Temperatures

作　　者：刘玲[1] 赵敏[1] 张世星[1] 白俊 

机构地区：[1]中国人民武装警察部队学院消防工程系 [2]青海省民和县公安消防大队,青海民和810800

出　　处：《火灾科学》2008年第3期150-154,共5页Fire Safety Science

摘　　要：红松的微观形貌及其成分含量与受热温度关系密切。对模拟火灾不同受热温度条件下的炭化红松样品,进行了扫描电镜(SEM)和X-射线能谱仪(EDS)分析。结果表明:受热后,炭化红松管胞切面逐渐变得光滑;管胞胞腔逐渐增大;管胞纤维间距逐渐加大;胞壁逐渐变薄,在高温作用下变形明显;管胞纤维结构仍然存在,但在高温时会出现明显断裂和破碎。随着受热温度升高,炭化红松表面的含碳量变大,含氧量减小,含钾量和含钙量变大。对炭化红松的微观形貌以及成分随受热温度的变化的研究,可以帮助火灾调查人员判断火灾蔓延路线,认定起火点,查明火灾原因。The heating temperature is closely related to the micrograph and surface elements contents of Korean pine. In this paper, Korean pine carbonization samples were analyzed at different heating temperatures by scanning electron microscope （SEM） and X-ray energy dispersive analysis （EDS）. The results show that the main structure of fiber tracheids still exits after being heated, but obvious deformations and fractures appear at high temperatures. As the temperature rises, the surfaces of tracheids become smoother, cell chambers become larger, cell walls become thinner and spacing intervals among fibers increase gradually. With the increase of temperature, carbon content increases, oxygen content decreases, potassium and calcium content increases. The results are helpful for fire investigators to seek for the fire spread route, determine fire origin and find out the cause of fires.

关 键 词：炭化红松 微观形貌 受热温度 扫描电镜 能谱分析 

分 类 号：TQ047.1[化学工程]