Aloisi Mirko, Karamanov Alexander, Taglieri Giuliana, Ferrante Fabiola, Pelino Mario
Department of Chemistry, Chemical Engineering and Materials, University of L'Aquila, Monteluco di Roio 67040, Italy.
J Hazard Mater. 2006 Sep 1;137(1):138-43. doi: 10.1016/j.jhazmat.2005.12.056. Epub 2006 Mar 28.
A glass ceramic composite was obtained by sinter-crystallisation of vitrified municipal solid waste bottom ashes with the addition of various percentages of alumina waste. The sintering was investigated by differential dilatometry and the crystallisation of the glass particles by differential thermal analysis. The crystalline phases produced by the thermal treatment were identified by X-ray diffraction analysis. The sintering process was found to be affected by the alumina addition and inhibited by the beginning of the crystal-phase precipitation. Scanning electron microscopy was performed on the fractured sintered samples to observe the effect of the sintering. Young's modulus and the mechanical strength of the sintered glass ceramic and composites were determined at different heating rates. The application of high heating rate and the addition of alumina powder improved the mechanical properties. Compared to the sintered glass ceramic without additives, the bending strength and the Young's modulus obtained at 20 degrees C/min, increased by about 20% and 30%, respectively.
通过对玻璃化城市固体废弃物底灰与不同百分比的氧化铝废料进行烧结-晶化，获得了一种玻璃陶瓷复合材料。采用示差热膨胀法研究烧结过程，用差示热分析法研究玻璃颗粒的晶化过程。通过X射线衍射分析确定热处理产生的晶相。发现烧结过程受氧化铝添加量的影响，并受到晶相沉淀开始的抑制。对断裂的烧结样品进行扫描电子显微镜观察烧结效果。在不同加热速率下测定烧结玻璃陶瓷及复合材料的杨氏模量和机械强度。采用高加热速率和添加氧化铝粉末提高了机械性能。与无添加剂的烧结玻璃陶瓷相比，在20℃/min加热速率下获得的抗弯强度和杨氏模量分别提高了约20%和30%。
