应力缓释相对低碳尖晶石-碳耐火材料性能的影响  

Effect of stress release phases on properties of low carbon spinel-carbon refractories

作　　者：李欣哲 刘国齐 李红霞[2] 顾强[2] 陈永强 郭海荣 Li Xinzhe;Liu Guoqi;Li Hongxia;Gu Qiang;Chen Yongqiang;Guo Hairong(School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China;不详)

机构地区：[1]郑州大学材料学院,河南郑州450001 [2]中钢集团洛阳耐火材料研究院有限公司先进耐火材料全国重点实验室,河南洛阳471039 [3]上海大学材料学院,上海200444 [4]江苏省沙钢钢铁研究院有限公司,江苏苏州215625

出　　处：《耐火材料》2025年第2期118-122,共5页Refractories

基　　金：国家重点研发计划(2021YFB3701400);国家自然科学基金(52302031,51932008)。

摘　　要：为了提高低碳尖晶石-碳耐火材料的抗热震性,以镁铝尖晶石和石墨为主要原料,引入环保沥青Carbores P(CP)、三聚磷酸钠和硼玻璃粉作为添加剂,在900℃埋碳气氛下保温3 h制备低碳尖晶石-碳材料。研究添加剂种类对材料性能的影响。结果表明:1)引入添加剂对试样的显气孔率以及体积密度影响较小。2)相比于三聚磷酸钠,添加CP和硼玻璃粉能够显著提高试样常温抗折强度;而添加CP能够较大提高试样的高温抗折强度。3)添加三聚磷酸钠能显著降低试样的热膨胀系数,并且能够有效改善试样的抗热震性。4)添加三聚磷酸钠能够制备出强度高、抗热震性好的低碳尖晶石-碳耐火材料。To improve their thermal shock resistance,low carbon spinel-carbon refractories were prepared with MgAl 2O 4 and graphite as the main raw materials,and environmentally friendly asphalt Carbores P(CP),sodium tripolyphosphate and boron glass powder as the additives,insulating at 900℃ for 3 h in a carbon embedded atmosphere.The influence of additive types on the properties of the refractories was studied.The results show that:(1)the additives have little effect on the apparent porosity and bulk density of the samples;(2)compared to sodium tripolyphosphate,the addition of CP or boron glass powder significantly improves the cold modulus of rupture of the samples;while the addition of CP increases the hot modulus of rupture of the samples;(3)the introduction of sodium tripolyphosphate significantly reduces the thermal expansion coefficient and effectively improves the thermal shock resistance of the samples;(4)low carbon spinel-carbon refractories with high strength and good thermal shock resistance can be prepared by adding sodium tripolyphosphate.

关 键 词：尖晶石-碳耐火材料 应力缓释相 线膨胀系数 抗热震性 

分 类 号：TQ175[化学工程—硅酸盐工业]