Mechanical-activated, combustion synthesis of β-SiAlON
Mechanical-activated, combustion synthesis of β-SiAlON
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DOI：
10.1016/j.jallcom.2010.01.105
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发表时间：
2010-04
影响因子：
6.2
通讯作者：
Xuemei Yi;T. Akiyama
中科院分区：
文献类型：
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作者：
Xuemei Yi;T. Akiyama
本文描述了在不同氮气压力（0.7、1.0、1.5 和 2.5MPa）下通过高能行星球磨辅助机械活化的燃烧合成（CS）合成 β-Si6−zAlzOzN8−z(z=1) 粉末。在这里，我们不仅使用 XRD 和 SEM 研究了球磨时间和氮气压力对 CSed 产物的反应速率和微观结构的影响，还研究了对 β-SiAlON CS 所需的氮气压力的影响。结果表明，延长球磨时间对于提高原料的反应活性以及提高β-SiAlON的转化率非常有效。机械活化最大限度地降低了燃烧合成β-SiAlON所需的氮气压力，仅在0.7MPa的氮气压力下反应即可自蔓延。值得注意的是，SEM观察表明，随着球磨时间的增加，棒状晶体聚集在一起，并随着氮气压力的增加而变得更长、更粗。
This paper describes the synthesis of β-Si6−zAlzOzN8−z(z=1) powder via combustion synthesis (CS) assisted with mechanical activation by a high-energy planetary ball milling under various nitrogen pressures (0.7, 1.0, 1.5, and 2.5MPa). Here, we did not examine only the effect of ball milling time and nitrogen pressure on the reaction rate and microstructure of CSed products using XRD and SEM, but also the effect on the nitrogen pressure required for CS of β-SiAlON. The results show that prolonged milling time was quite effective for enhancing the reactivity of raw materials and also for promoting the conversion rate of β-SiAlON. The mechanical activation minimized the required nitrogen pressure for combustion synthesizing β-SiAlON, which the reaction can self-propagate at only 0.7MPa in nitrogen pressure. Significantly, SEM observation revealed that the rod-like crystals agglomerated together with increasing ball milling time, and became longer and thicker with increasing nitrogen pressure.