微粒的
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The main object of this research is to investigate synthesis of Cu23Cl Cu and CuO nanoparticles through electrospinning and heat-treated method The research is mainly focused on preparative parameter and the change of heat-treated temperature to form the nanoparticles inlaid in silicon fibers the shape and color change are dicussed First of all to prepare the Polyvinyl butyral and silica dioxide complex nanofiber by electrospinning and then to investigate different heat-treated temperature and reactive time to being an influence on the products The results detected by SEM XRD TEM EDS FTIR combined sol-gel process and electrospinning can prepare Polyvinyl butyral and silica complex nanofiber The experimental result is found when heat-treated temperature is 100~4750C it can produce Cu23Cl nanoparticles; Above 4750C~ 4900C it can produce Cu nanoparticles; Above 450~7000C it can produce CuO nanoparticles And the viscosity is lain between 20~40cp and the sol-gel process time is 3hr it can produce the thinner fibers The average diameter of the fibers are 107 88±21 01nm;Due to the nanoparticles inlaid in the silica fibers the thinner fibers can be inlaid the smaller nanoparticles so this is the result that the experiment is expected To calcine the complex fibers is to produce surface silica fibers contain Cu23Cl Cu and CuO nanoparticles due to surface plasma resonance it make the color of the fibers become yellowish green from light white green turn into the red nuclear finally As the experimental result to utilize sol-gel process combine electrospinning can produce porous silica fibers contain Cu23Cl Cu and CuO nanoparticles
本研究旨在探讨「利用放电纺丝和热处理法来合成Cu23Cl、Cu和CuO奈米粒」之研究,实验著重在制备参数与热处理温度变化对所形成的奈米粒镶嵌在二氧化矽纤维中的形态与颜色变化探讨。首先,利用放电纺丝法制备出聚乙烯醇缩丁醛及二氧化矽之奈米纤维,比较不同的热处理温度与反应时间的改变对产物生成产生影响,进而研究不同热处理温度和时间对生成奈米粒的影响。产物经由SEM、XRD、TEM、EDS和FTIR等仪器分析结果显示,结合溶胶-凝胶法(sol-gel process)和放电纺丝法可产生聚乙烯醇缩丁醛及二氧化矽复合奈米纤维。实验结果发现,若热处理温度在100~4750C下可得到Cu23Cl奈米粒,475~4900C 可得Cu奈米粒,450~7000C以上可得 CuO奈米粒。而黏度介於20~40cp间和溶胶-凝胶时间为3hr时,可产生直径比较细的纤维,纤维直径为107 88±21 01nm;且由於奈米金属颗粒镶嵌在二氧化矽纤维中,直径比较细的纤维,可以得到比较小的奈米金属颗粒,这与实验预期相符。而锻烧此复合物产生多孔的二氧化矽纤维并包含Cu23Cl、Cu和CuO奈米微粒时,由於表面电浆子共震关系,而使纤维颜色由淡白黄绿色变成黄绿色,再变红褐色。由实验结果得知,利用溶胶-凝胶法(sol-gel process)结合放电纺丝法和不同热处理温度,可产生Cu23Cl、Cu和CuO奈米粒镶嵌在二氧化矽纤维。
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OF super grade, Grade I and II is exported. Fine talcum powder is of high whiteness in very fine granula tion which feels soft and slippery, so it is used in hitech fields, such as paint and coating industry, it is also used in paper making industry. Besides calcine talcum powder from 200 mesh to 1250 mesh is used in china and pottery industry. The following kinds such as Qixia3-grade blocks, 3-grade grains, 4 grade block and 4-grade grains are used as raw materials of china and pottery products. When 15% 80% of talcum powder is added in porcelain ,the Final china products is of very heat expansion, but of high strength, transparency and brilliance in colure and of very high percentage silicon , alg but of very low percentage of iron and aluminium.
特、一、二级产品90%以上出口;超微细滑石粉具有较高的白度、极细的微粒,柔软而有滑腻感,主要应用于高新技术领域,在油漆、涂料工业中用作体质填充料,在造纸工业中,用于涂层和涂料,可以改善纸张光泽和着墨性等;200目—1250目煅烧滑石粉主要应用于陶瓷釉面等;栖霞三级块、三级小粒、四级块、四级小粒是陶瓷生产的主要原料,在瓷土中掺入15%—80%的滑石粉,制成的各种瓷器,具有极少的热膨胀和温膨胀性,有强度高、不龟裂、增强韧性及透明度高、色彩明亮美丽等特点,并且以特别高的硅、镁和特别低的铁、铝含量而闻名陶瓷行业。
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The optical property of CdS nanocrystals in ZrO 2 thin film has been studied. The film was fabricated by sol gel technique. Photoluminescence and photoluminescence excitation spectra of the samples with different annealing temperature were measured. Photoluminescence decay curve of CdS nanocrystals at different annealing temperatures was studied.
研究了用溶胶凝胶方法制备的CdS超微粒/ZrO2薄膜的发光特性,测量了不同退火温度处理的样品的荧光光谱、荧光激发光谱和荧光衰减曲线的变化,通过荧光衰减曲线研究了140 ps左右的CdS的带间跃迁发射和较慢的表面态发射。
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The oil sewage disposed process is a complex disposal technique. The disposal process is more difficult for the change of PH Flux temperature of raw water and the other polluted quality. At present the disposed water by the system of oil of sewage is unstable and high cost. Now the method for the oil of sewage have physics chemistry physical chemistry and biology etc. In the every disposed method has its own specially, Basis of the oil sewage condition of power plant. The text use chemic method. Another word is method of Flocculation-deposition. Injecting Dosage into sewage. Making small suspends grain and the electrophorus colloid gather into bigger colloid and deposit. Separated it from water and purify the oil sewage. Make disposed oil water up to grade.
含油污水处理工艺是一个复杂的处理过程,在处理过程中由于受到原水浊度、PH值、配水流量、原水温度和其他水质污染等因素的影响,处理难度相当大,现时的含油污水处理系统普遍存在处理后的水质不稳定和处理成本高等问题,国内外含油污水处理采用的方法有物理法、化学法、物理化学法和生物法等,每种处理方法都有自己的特点,结合电厂含油污水的情况,本文主要采用化学法,具体来说是采用絮凝沉淀的方法,通过向废水中投加混凝剂,使细小的悬浮颗粒和带电胶体微粒聚集成较大颗粒而沉淀,使其与水分离,使含油污水得到净化,使处理后的废水各项指标达到排放标准。
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The factors that influence the noise performance of lithium-based grease were researched,the cleanliness of grease is merely one of essential conditions to decrease noise,the particle size of lithium soap thickener is smaller,the noise performance of grease is better,and the low viscosity naphthene base oil has good effect to decrease noise,the polymer can improve lubricity and decrease noise.
研究了影响锂基润滑脂噪音性能的各种因素,润滑脂的清洁度只是降低噪音的必要条件之一,锂皂稠化剂的微粒越小,润滑脂的噪音性能越好,低粘度的环烷基油具有良好的降低噪音的效果,高分子聚合物可以改善润滑性能,降低噪音。
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The substrates for measuring the activity of individual CYP in vitro included phenacetin, tolbutamide, debrisoquine, and omeprazole. RESULTS: Ther...
结果:CYP1A2、2C9及3A4的含量和活性具有很大的个体间变异,另外CYP2D6的活性在各样本间也有很大差异;CYP3A4(32%)是中国人肝微粒体中含量最丰富的CYP,CYP2C9(19%)和CYP1A2(16%)的含量也很可观;除了CYP1A2的含量和活性具有一定的种族和性别差异外,未发现其它CYP具有种族和性别差异;CYP1A2、2C9和3A4的酶蛋白含量分别和它们的活性具有很好的相关性。
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In this paper, reciprocal theorem methodis generalized to solve the problem of bending of thick rectangular plates under uniformly distributed load based on Reissner s theory.
功的互等定理功的互等定理"不成功"的模仿功的互等定律功的互等定理功的互等定理。功的互等的贝蒂定理修正的功的互等定理铁水含硅量磨削微粒
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Glaser has shown that most of this fertile organic matter comes from "black carbon"-the organic particles from camp fires and charred wood left over from thousands of years of slash-and-burn farming.
Glaster 已经表明大部分的这些富饶的有机物质来自于&黑碳&--这些有机微粒从上千年以前的削减、焚烧农场遗留下来的篝火和烧成炭的木头。
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And is improved; Water cooking method go on adherence test indicate to asphalt mixture, the viscosity rises to 4 or 5 from 3 or 4; The equivalent of changing the pitch of modified asphalt some, the needle enters one degree of findings in high- temperature performance , such as index ,etc., the high-temperature performance of changing the pitch of silicon is improved to some extent; Indicate that the mobility of the modified pitch is diminished in glueing the research of playing the index ; Oppose water damage research of ability indicate , resist water damage ability raise to some extent.
按标准对沥青混合料进行配级后,用马歇尔实验确定了12%由擦洗法提纯的露水河硅藻土改性沥青混合料的最佳沥青用量为4.5%,用硅藻土改性沥青改性效果较好,可用做公路沥青路面的改性材料。硅藻土改性剂与沥青在强制搅拌过程中,没有发生明显的化学变化,主要是物相之间的分散、均混、吸附和交联,所以主要是物理意义上的共容,因此是否共容,混匀至关重要,只有改性剂微粒能均匀稳定的分散在沥青中不发生分层、凝聚和离析,才能达到理想的改性效果。
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And the fields produced by gradient coils in a conventional MRI machine are not strong enough to pull on particles below about 250 micrometres in size, says Dr Martel, though an upgraded MRI system with more powerful coils could propel beads as small as 50 micrometres, he adds.
而在常规的MRI机器中由渐进的线圈生成的区域没有强大到可以吸引250微米以下大小的微粒,马特尔博士说,尽管拥有更强大的线圈的升级版MRI系统能够推动小到50微米的珠子。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力