主管:中华人民共和国应急管理部
主办:应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU

消防科学与技术 ›› 2021, Vol. 40 ›› Issue (11): 1658-1660.

• • 上一篇    下一篇

二氧化硅气凝胶粉体表征与爆炸特性研究

熊静文1,2,王家祎1,2,叶亚明1,2,王 彦1,2   

  1. (1.广州特种机电设备检测研究院,广东 广州 510700;2.国家防爆设备质量监督检验中心(广东),广东 广州 510700)
  • 出版日期:2021-11-15 发布日期:2021-11-15
  • 作者简介:熊静文(1992-),女,湖北仙桃市人,广州特种机电设备检测研究院国家防爆设备质量监督检验中心(广东)助理工程师,主要从事工业粉尘燃爆危险性研究,广东省广州市黄埔区黄埔东路3598号,510700。

Study on characterization of silica aerogel powder and its explosion performance

XIONG Jing-wen1.2, WANG Jia-yi1,2, YE Ya-ming1 2, WANG Yan1,2   

  1. 1. Guangzhou Academy of Special Equipment Inspection,Guangdong Guangzhou 510700, China; 2. China National Quality Supervision and Testing Center of Explosion-proof EquipmentGuangdong, Guangdong Guangzhou 510700, China
  • Online:2021-11-15 Published:2021-11-15

摘要: 利用SEM、XPS、XRD及FTIR表征二氧化硅气凝胶粉体,采用20 L球爆炸测试装置及1.2 L哈特曼管试验装置对其爆炸特性进行试验。结果表明:粉体为纳米级孔状三维结构,主要组成元素为Si和O,呈非晶形态,表面附有-CH3及-OH基团;爆炸下限为40~50 g/m3,最大爆炸压力为0.70 MPa,最大爆炸指数值为7.84 MPa·m/s,最小点火能为520 mJ,爆炸危险等级为St1。

关键词: 二氧化硅气凝胶, 粉尘爆炸, SEM, XPS, XRD

Abstract: SEM, XPS, FTIR, XRD were employed to characterize silica aerogel powder, the explosion characteristic parameters were measured by 20 L spherical explosion apparatus and 1.2 L Hartmann tube tester. The results indicated that silica aerogel dust has nano-scale crosslinked network structure. Si and O are main elements and exist in amorphous state with -CH3 and -OH groups on the surface. The lower explosion limit is 40~50 g/m3, the maximum explosion pressure is 0.70 MPa, the maximum explosion index is 7.84 MPa·m/s, the minimum ignition energy is 520 mJ, and the dust explosion risk level is St1.

Key words: Key words silica aerogel, dust explosion, SEM, XPS, XRD