具有不同异质节结构有机小分子紫外光探测器研究进展

有机紫外光探测器应用前景广泛,与无机紫外光探测器相比具有制作简单、成本低、质量轻便于携带、可制成大面积器件或者柔性衬底等优点。有机小分子紫外光探测器活性界面结构主要分为平面异质节、体异质节和混合层平面异质节。按照不同异质节结构,综述了近年来有机小分子紫外光探测器的研究进展,以及不同结构的优缺点,并根据相关文献报道,对如何提高器件性能提出了相应的改进措施。     

蒽醌型有机非线性光学材料的合成及紫外光谱性质

以1,5-二正丁氨基蒽醌和碘甲烷为原料合成不对称烷基氨基蒽醌,另外以吡啶做溶剂,使用亲核性很强的N,N-二甲肼,可以在较温和的条件下,以较高的收率合成双烷基氨基蒽醌化合物,合成的化合物的结构经IR和1HNMR得到了证实,同时对化合物的紫外可见光谱的分析表明,所合成的有机非线性光学材料与短波激光源具有良好的匹配性。     

PSSL测井仪探测器工作性能影响因素分析

PSSL脉冲中子全谱饱和度测井仪是一种较先进的套后剩余油饱和度测井仪,广泛用于油田的识别水淹状况、确定剩余油分布及挖潜增储的措施中。本文对PSSL测井仪探测器组成结构及工作原理进行研究,对应用中探测器工作性能影响因素进行了分析、总结了探测器性能改善措施,以达到提升测井资料质量的目的。     

影响紫外光固化多色光纤涂料性能的因素

在简述了识别用ＵＶ固化多色光纤涂料的研制情况以后，本文以固化速度和光纤传输性能为主线，讨论了氧气、染料诸因素的影响以及作者在光引发剂和光固化树脂等方面所做的工作。     

AlCl3在催化有机化学反应中的应用方式及其原理

对AlCl3在催化有机化学反应中的应用方式进行了较全面的综述,并分析了其催化原理。     

紫外光固化块体PMMA/SiO2有机/无机杂化材料

以正硅酸乙酯（TEOS）、甲基丙烯酸甲酯（MMA）为原料,采用溶胶－凝胶法和紫外光固化技术制备块体PMMA/SiO2有机/无机杂化材料,通过透射电镜（TEM）、红外光谱（FTIR）和差热分析（DSC）研究了杂化材料的微观特性和热性能,研究表明该方法制备的二氧化硅溶胶粒径在100 nm左右,分散良好;杂化材料中有机相和无机相是以共价键的形式相互连接的,没有出现有机相和无机相的相分离现象,并且两相之间形成了互穿的网络结构。     

甲醇合成原理及其影响因素

目前国内外生产甲醇的方法比较多,合成工艺流程虽然不同,但是许多基本步骤是具有相同的地方。用一氧化碳和氢气制备甲醇的反应,是一个体积减小、放热、并且在催化剂催化下的可逆反应。该反应要受到许多因素的影响,例如：温度、压力、空速、氢碳比、惰性气体以及催化剂。     

紫外光固化金属防腐蚀涂料的研究—对基质的附着力及其影响因素

提出了紫外光固化金属防腐蚀涂料。此涂料由含环氧基的预聚物、复合稀释剂、复合光引发剂及附着力促进剂等组成。叙述了预聚物合成、涂料配制，以及涂层附着力、耐磨损性的测试方法。讨论了涂料配方变化及附着力促进剂等因素对涂层附着力的影响。实验表明，多官能丙烯酸酯与单官能丙烯酸酯（摩尔比１：１）组成的复合稀释剂的效果最佳。安息香双甲醚与二苯甲酮配合，不仅消除了体系黄变，而且固化快，对紫外光源的适应范围广；复合光     

紫外光固化粉末涂料及其应用

粉末涂料是无溶剂的环保型涂料,具有工艺简单、节约能源、无污染、生产效率高等优点,但也存在加工温度高、固化时间长、不能在热敏基材上使用等缺点。而UV固化粉末涂料恰恰可以克服上述缺陷,具有更多优点。UV固化粉末涂料集热固粉末涂料和UV固化液体涂料的技术优势于一体,具有更高的经济优势和生态优势。     

聚氯乙烯的紫外光降解机理及影响因素

介绍了聚氯乙烯(PVC)的紫外光降解机理。PVC的立构规整性、溶剂、增塑剂、热稳定剂和颜料及PVC的共混物一般被认为是光降解的主要影响因素,紫外光波长及制品厚度会对紫外光降解过程产生一定影响。作为该领域的研究热点之一,有关光降解的研究不仅有利于防止PVC制品在一般场合下的过快降解,而且有益于合理利用PVC作为环保材料时的光降解特性。     

Synthesis of polycrystalline gallium oxide solar-blind ultraviolet photodetector by Aerosol Deposition

An aerosol deposition method was used to fabricate a solar-blind photodetector (for UV-C) using thin films of β-Ga₂O₃, which is a wide-bandgap oxide material. The Ga₂O₃ films deposited at room temperature presented a polycrystalline structure and a thickness of approximately 4 µm and showed a high transmittance of approximately 70–80 % in the visible region; the transmittance was approximately 60–80 % even after heat treatment up to a 800 °C. The Ga₂O₃ films that were post-annealed at a temperature of 800 °C showed an I_photo/I_dark ratio of approximately 40,000 in the solar-blind region with a light source of 254 nm, together with very good light detection characteristics (initial rising and decay times of 0.45 s and 0.13 s, respectively). Because of the good performances observed for the Ga₂O₃ thin films even at extreme conditions, they exhibit a high potential for use as photodetectors in several applications.     

Effect of oxygen flow ratio on the performance of RF magnetron sputtered Sn-doped Ga2O3 films and ultraviolet photodetector

This work explored the properties of RF magnetron sputtered Sn-doped Ga₂O₃ films grown on sapphire substrates at different oxygen flow ratios from 0.0 to 2.5%. The in situ optical emission spectroscopy was conducted to monitor the plasma radicals generated during the films’ deposition. All the films deposited at room temperature show amorphous structures with some nanoparticles. The deposition rate decreased monotonically with increasing oxygen flow ratio. The proposed conductive mechanism of the films can be mainly attributed to the changes in the ratio of substitutional Sn (Sn⁴⁺ valance state) atoms replacing lattice Ga sites (Ga³⁺ valance state) and the SnO₂ phase in the films. Metal–semiconductor–metal solar-blind photodetectors were developed and analyzed to illustrate the effect of oxygen flow ratio. A high performance photodetector with a low dark current of 1.14 pA, high on/off ratio of 812 and short rise/decay time of 0.05 s/0.12 s was realized at an optimization growth condition. The elaboration of the conductive mechanism and effect of oxygen flow ratio on the performance of Sn-doped Ga₂O₃ films and their photodetectors is crucial for the preparation of high-quality Sn-doped Ga₂O₃ films and its application in optoelectronic devices.     

丙烯聚合反应的主要影响因素及改进措施

结合丙烯聚合装置开工以来的生产经验,探讨了影响丙烯聚合反应的主要因素,并提出了相应的解决方法。     

影响边坡光面爆破效果的主要因素分析

以光面爆破成缝机理为依据,从四个方面对影响爆破效果的主要因素进行了深入分析,并结合工程实例,重点研究了岩石性质和地质条件对光面爆破效果的影响,详细阐述了其影响机理,针对四个方面提出了相应的光面爆破设计与施工建议.     

紫外光固化涂料的发展及应用

紫外光固化涂料是一种环保型涂料。在此详细阐述了紫外光固化涂料的特点、固化原理、涂料组成及应用,此外,介绍了我国此我固化涂料的发展概况２。     

影响高含固厌氧消化性能的主要因素研究进展

高含固厌氧消化具有所需反应器体积小、能量需求低、沼渣产量少以及沼渣后续处理简便等优点, 是实现固体废弃物资源化的重要途径, 因此对高含固厌氧消化性能的认识非常重要。本文重点阐述了原料、接种、含固率、温度、碳氮比和颗粒粒径等影响高含固厌氧消化性能的主要因素及其研究进展, 指出这些因素通过改变启动性能、甲烷产量、挥发性固体(VS)降解率和系统稳定性等对高含固厌氧消化过程产生影响, 且每个因素对消化性能的影响都至关重要。此外还指出, 对污水厂剩余污泥的高含固厌氧消化将会成为我国颇具应用前景的处理技术, 并从各个影响因素出发对高含固厌氧消化技术的实施提供了运行参数和优化措施, 以期为高含固厌氧消化技术的进一步完善提供借鉴。     

纳米材料在防紫外线纤维及其织物中的应用

详细介绍了纳米材料的基本原理、纳米防紫外线的基本机理以及纳米材料在防紫外线纤维及其织物上的应用方式。指出纳米材料应用于纤维及其织物的防紫外线是十分有效且可行的，并且有着广泛的应用和广阔的发展前景．     

Deposition and characterization of epitaxial Ta-doped TiO2 films for ultraviolet photoelectric detectors

Undoped and tantalum-doped titania (TiO₂:Ta) films were synthesized via metalorganic chemical vapor deposition (MOCVD). The crystallization qualities, surface morphologies and optical properties of the deposited films were systematically characterized. The results indicated that the films having low doping levels were epitaxial anatase titania along [001] orientation with high transparency in visible region. The optical band gap could be modulated from 3.38 to 3.52?eV by controlling Ta doping levels. Ultraviolet (UV) photoelectric detectors with metal-semiconductor-metal (MSM) structure were designed and fabricated based on the undoped and Ta-doped films. The maximum spectral response of 32.3?A/W was detected at about 315?nm for the 1% Ta-doped TiO₂ film-based detector. The detectors based on the undoped and 1% Ta-doped TiO₂ films also presented good temporal responses and visible-blind characteristics, showing excellent UV light detection performances.     

影响POY长丝动态热应力的因素分析

动态热应力可以反映POY长丝的内在质量,着重讨论了纺丝温度、冷却条件、生产负荷等因素对POY长丝动态热应力的影响,并提出了为改善POY的动态热应力,以及提高POY后加工性能的措施。     

An enzymatic approach to the determination of the degree of stabilization of organic carbon in fertilizers

An enzymatic approach to assess the stability of organic matter extracted from organic fertilizers and amendments is proposed. The use of 0.1M NaOH plus 0.1M Na₄P₂O₇ previously suggested as a suitable extractant solution for soil organic matter was also found satisfactory for the extraction of organic matter from organic fertilizers and amendments, especially when the temperature was raised to 65°C. The presence of nonhumified compounds in the extracts from organic fertilizers may interfere considerably during fractionation of organic carbon. An enzymatic hydrolysis with lipase, lysozyme and pronase, added sequentially to the extracts, led to an appreciable reduction in the interference. The interference was further reduced by carrying out a successive acid hydrolysis with 3N H₂SO₄; in this case the DH values (percentage of humified fractions with respect to total extractable carbon) were reduced to less than 10% in all organic fertilizers, but remained higher than about 70% in organic amendments.