在高纯镁砂中分别添加一定量的电熔铁铝尖晶石和烧结铁铝尖晶石，制成化学组成相近的两种镁铁铝尖晶石试样，检测试样热震前及热震1～10次后的体积密度，并采用超声波检测仪检测超声波脉冲通过热震前试样及热震1～10次后试样的速度，进而计算试样热震前及热震1～10次后的弹性模量，用弹性模量随热震次数的衰减速率或保持率表征试样的抗热震性。结果表明：超声波脉冲通过两种镁铁铝试样的速度与试样经历的热震次数之间的关系较好地符合 ExpAssoc 函数；以烧结铁铝尖晶石制备的镁铁铝尖晶石试样的抗热震性比以电熔铁铝尖晶石制备的试样的好。
Two magnesia-hercynite specimens with the similar chemical composition were prepared through adding an appropriate amount of fused hercynite or sintered hercynite into high purity magnesia.The bulk density of the specimens endured 0 -10 cycles of thermal shocks was measured,respectively.The velocity of the ultrasonic pulse passing through the specimens endured different cycles of thermal shocks was test-ed.The elastic modulus of the specimens was calculated from the measured values of ultrasonic velocity. The degradation or retention of the elastic modulus vs the thermal shock cycles of the specimens was used to characterize the thermal shock resistance.The results show that an ExpAssoc approximation can be used to describe the changes of the ultrasonic velocities vs the thermal shock cycles.Compared with the specimen synthesized with fused hercynite,the specimen with sintered hercynite possesses better thermal shock resistance.
参考文献
| [1] | 郭宗奇,Josef NIEVOLL.氧化镁-铁铝尖晶石耐火材料在水泥回转窑中的应用[J].中国水泥,2007(05):63-67. |
| [2] | 周芬,赵惠忠,王立峰,慕松林,崔江涛,吕永峰.FeAl2O4对方镁石-铁铝尖晶石质耐火材料性能的影响[J].耐火材料,2014(02):89-93. |
| [3] | 丁达飞,李志坚,栾旭,吴锋.不同铁载体对镁铁铝尖晶石材料性能影响[J].硅酸盐通报,2014(12):3108-3112. |
| [4] | 李国华,陈树江,刘正韬.铁铝尖晶石的合成及应用[J].硅酸盐通报,2013(03):501-505. |
| [5] | 陈俊红,封立杰,孙加林,封吉圣,朱波.铁铝尖晶石的合成及镁铁铝尖晶石砖的性能与应用[J].耐火材料,2011(06):457-461. |
| [6] | 全国耐火材料标准化技术委员会.耐火材料标准汇编[M].北京:中国标准出版社,2007:244-253. |
| [7] | D.N. Boccaccini;M. Romagnoli;E. Kamseu .Determination of thermal shock resistance in refractory materials by ultrasonic pulse velocity measurement[J].Journal of the European Ceramic Society,2007(2/3):1859-1863. |
| [8] | M. Posarac;M. Dimitrijevic;T. Volkov-Husovic;J. Majstorovic;B. Matovic .The ultrasonic and image analysis method for non-destructive quantification of the thermal shock damage in refractory specimens[J].Materials & Design,2009(8):3338-3343. |
| [9] | Timoshenk S.Theory of Elasticity[M].New York:McGraw-Hill,1934:51. |
| [10] | 李楠;顾华志;赵惠忠.耐火材料学[M].北京:冶金工业出版社,2010:18. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%