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Journal of Semiconductors 2016年第3期37卷 115-121页

作者： Khushnuma Asghar d.das School of Engineering Sciences and Technology University of Hyderabad

An abrasive free chemical mechanical planarization（AFCMP） of semi-polar（1122） Al N surface has been demonstrated. The effect of slurry p H, polishing pressure, and platen velocity on the material removal rate（MRR） and surface quality（RMS roughness） have been studied. The effect of polishing pressure on the AFCMP of the（1122） Al N surface has been compared with that of the（1122） Al Ga N surface. The maximum MRR has been found to be 562 nm/h for the semi-polar（1122） Al N surface, under the experimental conditions of 38 k Pa pressure,90 rpm platen velocity, 30 rpm carrier velocity, slurry p H 3 and 0.4 M oxidizer concentration. The best root mean square（RMS） surface roughness of 1.2 nm and 0.7 nm, over a large scanning area of 0.70×0.96 mm^2, has been achieved on AFCMP processed semi-polar（1122） AlN and（AlGaN） surfaces using optimized slurry chemistry and processing parameters.

关键词： Al N AFCMP chemical mechanical planarization material removal rate surface roughness

Effect of Zn Concentration on Microstructural,Optical,and Hyperfine Properties of Nanocrystalline a-Fe_(2)O_(3)

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Acta Metallurgica Sinica(English Letters) 2014年第4期27卷 563-568页

作者： N.R.Panda d.Sahu B.S.Acharya P.Nayak S.P.Pati d.das School of Basic Science Indian Institute of Technology BhubaneswarBhubaneswar 751013OdishaIndia School of Physics Sambalpur UniversitySambalpur 768019OdishaIndia School of Chemistry Sambalpur UniversitySambalpur 768019OdishaIndia C.V.Raman College of Engineering Bhubaneswar 752054OdishaIndia department of Electronic Engineering Tohoku UniversitySendai 980-8579Japan UGC-dAE CSR Sector IIILB-8Bidhan NagarKolkata 700098India

Efforts have been made to prepare nanocomposites of a-Fe2O3-ZnO by wet chemical route with varying concentrations of the *** microstructural properties of the samples are investigated by powder X-ray diffractometry（PXRd） and Transmission electron *** concentration of Zn ions（up to 20 at%） leads to the formation of nanocomposites of a-Fe2O3 and *** of ZnFe2O4 phase is detected by the substitution of higher concentration of Zn2？（30 at%） in the *** average size of the nanoparticles remains in the range of 22–27 nm as obtained from XRd *** results obtained from electron microscopic studies are also close to these *** measurement shows the excitonic peak of ZnO around 390 nm which gets strengthened with Zn *** spectra show the metal–oxygen band below 700 *** temperature Mssbauer studies of the samples show the transition of iron oxide form antiferromagnetic state to paramagnetic state with increasing concentration of Zn2？.Sharp quenching of hyperfine field with Zn concentration is observed as the Hintvalue reduced to zero from 51 T.

关键词： Iron oxide ZnO Electron microscopy Mssbauer study

丝胶:源于工业废弃物的环境友好型有机整理剂

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国际纺织导报 2014年第1期42卷 48-,67页

作者： d.das d.Manchanda 刘鹏纺织科学技术学院印度

丝胶蛋白是球状蛋白质,由18个氨基酸组成。丝胶独特的重复性氨基酸排列有利于其作为天然有机整理剂用于纺织品。丝胶的保水性可用于提高织物舒适性和提升纺织品的其他功能价值。丝胶的氮含量有助于产生阻燃性。丝胶具有抗菌性及促进伤... 详细信息

丝胶蛋白是球状蛋白质,由18个氨基酸组成。丝胶独特的重复性氨基酸排列有利于其作为天然有机整理剂用于纺织品。丝胶的保水性可用于提高织物舒适性和提升纺织品的其他功能价值。丝胶的氮含量有助于产生阻燃性。丝胶具有抗菌性及促进伤口愈合的特点,因此丝胶可用于医用纺织品的整理。丝胶对角蛋白的亲和性则证明了其更适合应用于毛织物。

关键词：丝胶有机整理剂环境友好

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PA6/EVA共混纤维的研究

国际纺织导报 2013年第11期41卷 15-16,22,64页

作者： d.das A.Vashistha 赵华蕾(译) 王依民(校) 纺织科技学院(印度) 不详

研究了尼龙6(PA 6)与乙烯醋酸乙烯酯(EVA)组成的共混纤维。将PA 6切片与EVA进行共混,EVA的质量分数分别为0%、1%、2%和4%。结果表明:在恒定的拉伸比下,随着EVA质量分数的增加,密度、光学双折射、结晶度、强度和模量降低,而染料上染率和... 详细信息

研究了尼龙6(PA 6)与乙烯醋酸乙烯酯(EVA)组成的共混纤维。将PA 6切片与EVA进行共混,EVA的质量分数分别为0%、1%、2%和4%。结果表明:在恒定的拉伸比下,随着EVA质量分数的增加,密度、光学双折射、结晶度、强度和模量降低,而染料上染率和染色百分比增加。由dSC和SEM测试结果可知PA 6和EVA显现出良好的相容性,并且当EVA质量分数为2%时,可以在低成本下提高PA 6纤维的染色性能。

关键词：尼龙6 乙烯醋酸乙烯酯共混纤维性能

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应用人工神经网络预测转杯纱性能

国际纺织导报 2004年第3期32卷 30-34页

作者： d.das S.M.Ishtiaque T.Mac T.Gries 陈廷印度技术学院亚琛纺织技术学院

应用人工神经网络对不同混纺比转杯纱的性能进行预测。研究中使用的原料为棉、聚酯纤维、粘胶纤维和亚麻。这些纤维以不同混坊比进行随机混合,在Uster MdTA 3设备上加工成条子。然后,在一台转杯纺小样机上将这些条子纺制成388个转杯纱... 详细信息

应用人工神经网络对不同混纺比转杯纱的性能进行预测。研究中使用的原料为棉、聚酯纤维、粘胶纤维和亚麻。这些纤维以不同混坊比进行随机混合,在Uster MdTA 3设备上加工成条子。然后,在一台转杯纺小样机上将这些条子纺制成388个转杯纱纱样。测试了纱线的拉伸性能、条干不匀率、毛羽和捻度。研究中采用基于误差反向传播算法的人工神经网络软件ITANET-3.7预测纱线性能。通过对不同网络参数进行优化得到了最佳的网络结构,还研究了该网络的性能。

关键词：转杯纱混纺比转杯纺纱线性能小样捻度毛羽条干不匀率聚酯纤维混合

Uster MdTA3型的最佳纤维混合方法

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国际纺织导报 2004年第2期32卷 35-40页

作者： d.das S．M．Ishtiague T．Mac T．Gries 江慧李毓陵印度工业大学纺织系（印度）莱茵威斯特伐利亚大学亚琛纺织学院（德国）不详

评价了UsterMdTA 3型设备最佳的纤维混合方法 ,以便用UsterMdTA 3型设备加工的条子生产的转杯纱的性质可以和其他工业化生产的纱线比美。采用了五种不同的混合纤维的方法 ,以 5 0 /5 0的比例混合棉与粘胶纤维 ,并使用Optimas 6.2图像处... 详细信息

评价了UsterMdTA 3型设备最佳的纤维混合方法 ,以便用UsterMdTA 3型设备加工的条子生产的转杯纱的性质可以和其他工业化生产的纱线比美。采用了五种不同的混合纤维的方法 ,以 5 0 /5 0的比例混合棉与粘胶纤维 ,并使用Optimas 6.2图像处理软件来评价出最好的混合方法。研究了加工工序的道数对混合质量的影响。此外 ,通过性能对比 ,验证了用UsterMdTA

关键词： Uster MdTA3型设备纤维混合方法转杯纱并条条子生产方法

生物复合材料用亚麻/PLA预形纱的制备与优化

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国际纺织导报 2014年第1期42卷 39-40,42页

作者： H.Kaur d.das S.Ramaswamy B.Aslam T.Gries 杨婷婷印度理工学院亚琛工业大学

由可再生资源生产的生物复合材料是合成纤维增强塑料复合材料的潜在替代品,其中的可再生资源由天然纤维增强生物聚合物组成。对用于生物复合材料的亚麻/PLA预形纱的研发进行了论述。采用Box-Behnken试验设计和响应面分析法研究了纺纱工... 详细信息

由可再生资源生产的生物复合材料是合成纤维增强塑料复合材料的潜在替代品,其中的可再生资源由天然纤维增强生物聚合物组成。对用于生物复合材料的亚麻/PLA预形纱的研发进行了论述。采用Box-Behnken试验设计和响应面分析法研究了纺纱工艺参数对纱线拉伸强度的影响。根据转杯纺工艺参数所得的表达式可用于预测纱线的拉伸强度,且预测结果与试验结果基本保持一致。

关键词：亚麻/PLA预形纱 Box-Behnken设计响应面法转杯纺工艺参数拉伸强度

Enhanced strength in novel nanocomposites prepared by reinforcing graphene in red soil and fly ash bricks

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International Journal of Minerals,Metallurgy and Materials 2019年第10期26卷 1322-1328页

作者： Jit Sarkar d.K.das department of Metallurgical and Materials Engineering Indian Institute of TechnologyKharagpur 721302West BengalIndia department of Mechanical Engineering Indian Institute of Technology(Indian School of Mines)Dhanbad 826004JharkhandIndia

Low-dimensional nanomaterials such as graphene can be used as a reinforcing agent in building materials to enhance the strength and durability. Common building materials burnt red soil bricks and fly ash bricks were reinforced with various amounts of graphene, and the effect of graphene on the strength of these newly developed nanocomposites was studied. The fly ash brick nanocomposite samples were cured as per their standard curing time, and the burnt red soil brick nanocomposite samples were merely dried in the sun instead of being subjected to the traditional heat treatment for days to achieve sufficient strength. The water absorption ability of the fly ash bricks was also discussed. The compressive strength of all of the graphene-reinforced nanocomposite samples was tested, along with that of some standard (without graphene) composite samples with the same dimensions, to evaluate the effects of the addition of various amounts of graphene on the compressive strength of the bricks.

关键词： graphene burnt red soil brick fly ash brick nanocomposites compressive strength

Petrological Characteristics and Genesis of the Central Indian Ocean Basin Basalts

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Acta Geologica Sinica(English Edition) 2012年第5期86卷 1154-1170页

作者： Pranab das Sridhar d.IYER Sugata HAZRA National Institute of Oceanography(Council of Scientific and Industrial Research)dona Paula Goa 403004India department of Applied Geology Indian School of MinesDhanbad 826004India School of Oceanographic Studies Jadavpur UniversityKolkata 700032India

The Central Indian Ocean Basin （CIOB） basalts are plagioclase-rich, while olivine and pyroxene are very few. The analyses of 41 samples reveal high FeOT （～10-18 wt%） and TiO 2 （～1.4-2.7 wt%） indicating a ferrobasaltic composition. The basalts have high incompatible elements （Zr 63-228 ppm; Nb ～1-5 ppm; Ba ～15-78 ppm; La ～3-16 ppm）, a similar U/Pb （0.02-0.4） ratio as the normal midoceanic basalt （0.16±0.07） but the Ba/Nb （12.5-53） ratio is much larger than that of the normal midoceanic ridge basalt （～5.7） and Primitive Mantle （9.56）. Interestingly almost all of the basalts have a significant negative Eu anomaly （Eu/Eu＊=0.78-1.00） that may have been a result of the removal of feldspar and pyroxene during crystal fractionation. These compositional variations suggest that the basalts were derived through fractional crystallization together with low partial melting of a shallow seated magma.

关键词： basalts Genesis Central Indian Ocean Basin

Enhanced Performance of discharge Plasma in Raw Engine Exhaust Treatment-Operation under different Temperatures and Loads

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Plasma Science and Technology 2005年第4期7卷 2943-2946页

作者： B S Rajanikanth A d Srinivasan Subhankar das dept.of High Voltage Engineering Indian Institute of Science Bangalore 560012IndiaDept.of High Voltage Engineering Indian Institute of ScienceBangalore 560012IndiaDept.of High Voltage Engineering Indian Institute of ScienceBangalore 560012India

This paper reports improved performance of discharge plasma in raw engine exhaust treatment. For the purpose of investigation, both filtered and raw diesel engine exhaust were separately treated by the discharge plasma. In raw exhaust environment, the discharge plasma exhibits a superior performance with regard to NOx removal, energy consmnption and formation of by-products. In this study, experiments were conducted at conditions of different temperatures and loads.

关键词： raw diesel engine exhaust discharge plasma NOx removal