论文标题
二氧化硅复合材料用于近红外反射：一项全面的计算和实验研究
Silica-Silicon Composites for Near-Infrared Reflection: A Comprehensive Computational and Experimental Study
论文作者
论文摘要
含有脉冲电流烧结固结的嵌入半导体颗粒的紧凑层表现出强烈的宽带近红外反射率。从纳米或微硅粉末合并的复合材料具有不同的多孔微观结构，可在空气矩阵界面上散射，并且主要在可见区域中的较大反射率。在近红外区域中，3毫米厚的复合紧凑型的成入射辐射的72％，半导体微交易体积分数为1％，这与多尺度蒙特卡洛建模和库贝尔卡 - 蒙克理论的预测非常匹配。此外，计算出的光谱通过减小平均粒径或扩大标准偏差来预测反射率的提高。通过最小的耗散损失和便捷的制造可以实现高反射率，并且此处描述的复合材料非常适合控制在高温和恶劣条件下设备中热量的辐射转移。
Compact layers containing embedded semiconductor particles consolidated using pulsed electric current sintering exhibit intense, broadband near-infrared reflectance. The composites consolidated from nano- or micro-silica powder have a different porous microstructure which causes scattering at the air-matrix interface and larger reflectance primarily in the visible region. The 3 mm thick composite compacts reflect up to 72% of the incident radiation in the near-infrared region with a semiconductor microinclusion volume fraction of 1% which closely matches predictions from multiscale Monte Carlo modeling and Kubelka-Munk theory. Further, the calculated spectra predict an improvement of the reflectance by decreasing the average particle size or broadening the standard deviation. The high reflectance is achieved with minimal dissipative losses and facile manufacturing, and the composites described herein are well-suited to control the radiative transfer of heat in devices at high temperature and under harsh conditions.
