Xingyuan LUO
,
Jialin SUN
,
Chengji DENG
,
Yanruo HONG
材料科学技术（英文）
It is worth to study the synthesis of β-Sialon from coal gangue, because coal gangue is a waste of coal production and is a high quality kaolin contained carbon which is a perfect raw material of contained reducer itself for synthesis of β-Sialon. The study showed that a high conversion rate of 95% from coal gangue to β-Sialon could be obtained by using process of carbothermal reduction nitridation when strictly controlled the thermodynamic conditions of synthesis. For controlling the synthesis conditions easy, the details of the effects of pco, po2 and T on the conversion rate of β-Sialon were discussed detailedly and the phase diagrams of oxygen pressure vs composition for Si3N4-AlN-Al2O3-SiO2 system at 1350, 1500, and 1600oC were constructed in the paper.
关键词:
β-Sialon
,
null
,
null
,
null
杨立新
,
巴黎明
,
李星
工程热物理学报
本文应用MUSIG模型[1]和均一直径模型对某溶液堆台架模型堆芯内气液流动传热进行了数值模拟.在MUSIG模型中堆芯内离散相气泡被分为5组不同直径的气泡,用于分析堆芯内气泡的流动变化和大小分布,采用Luo and Svendsen[2]和Prince and Blanch[3]模型描述不同直径气泡组间的破裂和聚合.在均一直径模型中,堆芯内的气体被考虑为同一直径的组分,并且不考虑其破裂与聚合现象.计算得到采用两个模型的模拟结果并且对其进行了对比研究.结果显示应用MUSIG模型的计算结果与台架实验结果吻合更好.
关键词:
MUSIG
,
均一直径
,
两相流
,
溶液堆
