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电磁波对化学反应非致热作用的实验研究 总被引:36,自引:0,他引:36
微波加快化学反应速度除微波对反应物的加热以外还有非致热的作用,本文用实验证实了电磁波对离子和极性分子的洛仑兹力的作用导致了指前因子和活化能的变化,并提出用电磁作用因子描术电磁波对化学反应作用的大小。 相似文献
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Er3+,Ho3+和Tm3+在硫氧化钆中的余辉发光 总被引:1,自引:0,他引:1
The new Er^3 , Ho^3 and Tm^3 doped gadolinium oxysulfide phosphors with the long afterglow emission were synthesized by solid-state reaction method. The synthesized phosphors were characterized by X-ray diffraction. The excitation and photolumineseenee spectra, afterglow spectra and afterglow decay curve were examined by fluorescence spectroscopy. The afterglow spectra of Gd2O2S:Er^3 , Mg, Ti showed typical transitions of Er^3 at 528(2H11/2→4I15/2), 548 (^4S3/2 →^4I15/2) and 669 nm (^4F9/2→^4I15/2). In the afterglow spectra of Gd2O2S: Ho^3 , Mg, Ti,typical transitions of Ho^3 at 546 nm (^5S2→^5I8), 651 and 661 nm (^2F5→^5I8) were observed. In Gd2O2S:Tm^3 , Mg,Ti, the afterglow emission at 800 nm (^1G4→^3H5) of Tm^3 was seen. The meehnism and model of afterglow energy transfer were proposed. 相似文献
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Wang Jing-Xian Liu Nan Wang Chen Xu Jian 《International Journal of Theoretical Physics》2019,58(8):2654-2663
International Journal of Theoretical Physics - Quantum secure communication is the key development object of current communication technology. There are many branches, among which the most... 相似文献
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医用多孔NiTi合金表面溶胶-凝胶法制备TiO2涂层 总被引:1,自引:0,他引:1
采用溶胶-凝胶法结合浸渍提拉工艺在多孔NiTi合金表面制备出了结构均一的锐钛矿型TiO2涂层,并在溶胶中添加聚乙二醇(PEG)作为造孔剂,进而在多孔NiTi合金表面制备出内层致密、外层多孔的TiO2复合涂层。SEM分析结果表明,TiO2涂层均匀地覆盖了多孔NiTi合金基体的外表面以及孔的内表面。Hanks溶液中的阳极极化曲线结果表明,与未处理的多孔NiTi合金相比,具有致密TiO2涂层的多孔NiTi合金其耐腐蚀性能有了显著提高。而多孔TiO2复合涂层进一步增大了多孔NiTi合金的实际表面积,提高了材料表面的生物活性。 相似文献
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几种中高温热泵工质的循环性能实验研究 总被引:3,自引:0,他引:3
出于对工质自身环境特性和系统运行性能对环境的综合影响的考虑,对理论循环性能优良的HCFCs工质HCFIC124、HCFC142b,含有HCFCs的二元混合工质MB3B、 MB3C、 MB1B和三元混合工质MT1C,在冷凝温度为60~90℃的中高温热泵工况范围内,进行了循环性能对比实验研究.实验在水-水蒸汽压缩式热泵实验台上、以指定工质侧参数的实验方式进行.结果表明, 6种工质的实验循环性能优良.与ODP为0、具有在冷凝温度为80℃以上的工况范围应用潜力的代表性工质HFC245fa相比,在HFC245fa适用的实验工况范围内,6种工质的压缩机排气温度均高丁HFC245fa; MB1B.MT1C系统的COP明显高丁HFC245fa,其余4种工质系统的COP略高于HFC245fa;6种工质系统的制热量均明显高丁HFC245fa. 相似文献
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AN ANALYTIC EXPRESSION FOR NON-SINGLET COMPONENT OF NUCLEON STRUCTURE FUNCTIONS TO THE NEXT ORDER EFFECTS 下载免费PDF全文
Using the inverse Mellin transformation method, we get the analytic expression for non-singlet nucleon structure function from its moment to the next order effects. The comparison between theoretical prediction and experimental data is also discussed. 相似文献
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The scale-breaking parameter F2ep(x, Q2) of non-singlet component F2ep-F2en and some other quantities in the electro-production process are discussed by usinb the analytic expression for the distribution function of valence quarks in ha.drons up to leading log approximation given by a, previous paper[1]. Comparisons with data are also given.