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J. Cent. South Univ. Technol. (2011) 18: 2176-2184 DOI: 10.1007/s11771-011-0960-7 Application of micro/nanoscale thermal radiation to thermophotovoltaic system WANG Ai-hua(王爱华)1, 2, CAI Jiu-ju(蔡九菊)1... system; micro/nanoscale radiation; quantum efficiency; emitter; filter; photon tunneling 1 Introduction Fast depleting reserves of conventional energy sources have resulted in an urgent need......
observations indicate that with larger grain sizes than those of Zn0.99Fe0.01O and Zn0.99Ni0.01O, Co-doped ZnO exhibits smooth grain surfaces. The infrared absorption spectra show that infrared absorptions related to oxygen in Zn0.99M0.01O are much stronger than those in Co-doped ZnO. Co ions are dissolved into the ZnO lattice with Co2+ state from XPS spectra analysis. The infrared emissivity results......
的, 即沉积的是α-Fe, 且Fe纳米线阵列生长时, (110)晶面沿着纳米线的长轴生长, 表现出很强的织构. 图3所示为α-Fe纳米线阵列的电镜照片. 从图3(a)中可以看出, 黑色的(A层)为铁纳米线, 其厚度约为15μm; 中间一层为铝层(B层); 下层为氧化铝层(C层), 因其不导电而在扫描电镜中显示白色. 图2 ...纳米线有大小一致的直径(约为25nm), 纳米线之间相互平行. 2) 提高铁纳米线的体积分数, 可增大随机分布的Fe纳米线/绝缘体复合吸波材料的电磁参数. 3) 通过不同Fe纳米线含量的随机分布铁纳米线/绝缘体复合吸波材料的不同厚度反射率的研究表明, 对体积分数约为25%的复合吸波材料, 最佳的吸收厚度为1.14mm, 在9.7GHz有最大反射率(-45dB), 在反射率小于-5dB的带宽......
催化光度法测定痕量铁的研究──Fe(Ⅲ)-对乙酰基偶氮胂-H_2O_2体系赵书林,夏心泉,高光炎,马厚蓉摘 要:本文基于在弱酸性介质中及活化剂α, α-联吡啶存在下,痕量铁(Ⅲ)对过氧化氢氧化对乙酰基偶氮胂的反应有强烈的催化作用,建立了催化光度法测定痕量铁的新方法.该法灵敏度为1;14×10 ̄(-11)g/mL,测定范围为0~0.10μg Fe ̄3+/25mL,表观活化能为82.24KJ/mol.应用于大米,小米和小麦中痕量铁的测定,结果满意.关键词:铁;对乙酰基偶氮胂;催化动力学光度法;......
Non-isothermal microwave leaching kinetics and absorption characteristics of primary titanium-rich materials XIA Hong-ying(夏洪应)1, 2, PENG Jin-hui(彭金辉)1, 2, NIU Hao(牛 浩)1, 3, HUANG..., China; 2. Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming University of Science and Technology, Kunming 650093, China; 3. Yunnan Copper Co., Ltd., Kunming 650102, China......
system in real time. The strain, resistivity and infrared radiation (IRR) are compared to investigate the precursory characteristic of backfill specimen failure. The objective of the work is to investigate... and then increases again. Fig. 1 Component diagram of experiment system setup Fig. 2 Monitoring results for uniaxial compression test on different samples: Fig. 3 Failure of some cemented backfill mass......
of fluorescent/magnetic bifunctional starch particles WANG Feng-hua(王凤华)1, LIU Jun(刘俊)1, 2, TANG Dong-ying(唐冬英)1, XUE Chang-gang(薛昌刚)1, XIAO Su-yao(肖苏尧)1, ZHENG Yuan-qing(郑元青)1, TONG Chun-yi(童春义)1, WANG Ling-ling(王玲玲)3, LIU Xuan-ming(刘选明)1 1. College of Life Science and Biotechnology, Hunan University, Changsha 410082, China; 2. College of Materials Science and Engineering, Hunan University......
in the frequency range from 2 to 18 GHz according to measurements. The results show that the crystal structure of Bi1-xLaxFeO3 is perovskite, the morphology of the particles looks like irregular short...有序共存的多铁材料[12].铁电极化可以引起介电损耗,因而表现出一定的微波吸收特性(见图4).通过掺杂一定量的稀土可以进一步提高介电性能并获得一定的磁性[3, 13-14].其原因是掺杂引起晶格畸变,铁电极化增强,自旋倾斜,Fe-O-Fe键角变化引起自发磁化,螺旋磁结构受到抑制而表现出潜在磁性[4-5, 15].所以,BiFeO3在适当掺杂后,微波吸收性能得到改善,但掺杂过量可能使磁有序受到一定程......
2,4,6-三(2′-吡啶基)-1,3,5-三嗪分光光度法测定Fe(Ⅱ)和Fe(Ⅲ)的研究董春洲,杨敏,王文芳摘 要:研究了F-掩蔽Fe(Ⅲ ) ,2 ,4,6 三 (2′ 吡啶基 ) 1 ,3 ,5 三嗪 (TPTZ)作显色剂测定Fe(Ⅱ )和Fe(Ⅲ )的适宜条件.实验结果显示 :在 0~ 2 .0 μg mLFe(Ⅱ )范围内符合比耳定律 ,RSD≤ 2 .4% ,回收率范围 95 .6 %~ 1 0 3 .5 % ,吸光度至少稳定 1 2h ,ε593 =2 .2 7×1 0 4L·mol-1 ·cm-1 ,灵敏度是邻菲口罗啉法的 2倍.适用于同时测定水中Fe(Ⅱ )和Fe(Ⅲ ).关键词:2,4,6三(2′-吡啶基)-1,3,5-三嗪;分光光度法;铁;价态分析;......
of Fig. 3 with Fig. 2 indicates a significant difference in pore morphology made with and without the heat treatment under the same corrosion process. There is no significant morphology evolution... selective corrosion for 1 d (Fig. 3(a)). Free corrosion for 2 d produces nanoporous phases with a uniform sponge-like morphology (Fig. 3(b)). The average diameter of ligaments increases from 30 nm after 1......