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超级DOT4型汽车制动液的研制 被引量:2
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作者 姜燕 王峰 +2 位作者 许东海 顾秀杰 代伟娜 《润滑油》 CAS 2013年第6期34-39,共6页
以硼酸、二乙二醇、三乙二醇单甲醚或四乙二醇单甲醚为合成硼酸酯的主体材料,采用"一锅合成法"制备了两种符合超级DOT4标准的硼酸酯型汽车制动液,并按国标GB 12981-2012要求考察了该制动液的主要性能指标。试验结果表明,制备... 以硼酸、二乙二醇、三乙二醇单甲醚或四乙二醇单甲醚为合成硼酸酯的主体材料,采用"一锅合成法"制备了两种符合超级DOT4标准的硼酸酯型汽车制动液,并按国标GB 12981-2012要求考察了该制动液的主要性能指标。试验结果表明,制备的超级DOT4型制动液其干平衡回流沸点分别为270℃和272℃,湿平衡回流沸点分别为192℃和195℃,运动黏度(-40℃)分别为1033 mm2/s和915 mm2/s,均达到了超级DOT4型制动液的要求。"一锅合成法"制备的超级DOT4型汽车制动液与复配法相比,性能优异、工艺简单、生产成本低,适用于超级DOT4型汽车制动液的生产。 展开更多
关键词 制动液 超级dot4 硼酸酯
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DOT3和DOT4型制动液失效的影响因素探究 被引量:1
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作者 张俊杰 陈炳耀 +1 位作者 杨善杰 潘津炼 《广东化工》 CAS 2016年第23期39-40,共2页
目前人们对于汽车的需求量在不断增加,但对于车用油品的了解达不到标准,许多人对制动液是否失效和更换存在盲区。文章主要通过分析时间,水分和混油对其ERBP,p H和运动粘度的影响,确定相关失效点。通过实验分析得出,时间对制动液的影响... 目前人们对于汽车的需求量在不断增加,但对于车用油品的了解达不到标准,许多人对制动液是否失效和更换存在盲区。文章主要通过分析时间,水分和混油对其ERBP,p H和运动粘度的影响,确定相关失效点。通过实验分析得出,时间对制动液的影响在相关性质指标范围内,加入2.5 m L去离子水,加入10%的汽机油和20%ATF220都为相应制动液的失效点。 展开更多
关键词 DOT3 dot4 水分 混油 ERBP
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DOT4合成制动液的开发与应用 被引量:1
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作者 石俊峰 褚丽 +1 位作者 李春辉 李振生 《石油商技》 2001年第3期9-12,共4页
采用进口窄馏分高分子聚醚及其酯化物为基础液,加入多种添加剂,经适当工艺研制成功DOT4合成制动液。理化性能分析、标准台架及实车道路试验结果表明,其质量指标符合IVECO CMD18-1820、ISO4925、FMVSS No.116 DOT4标准要求,与IVECO、NJ1... 采用进口窄馏分高分子聚醚及其酯化物为基础液,加入多种添加剂,经适当工艺研制成功DOT4合成制动液。理化性能分析、标准台架及实车道路试验结果表明,其质量指标符合IVECO CMD18-1820、ISO4925、FMVSS No.116 DOT4标准要求,与IVECO、NJ1030、NJ1062系列汽车适应性良好。 展开更多
关键词 合成制动液 开发 应用 汽车制动液 dot4 理化性能
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硼酸酯对合成制动液DOT4性能的影响研究
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作者 张琴 陈炳耀 +2 位作者 杨善杰 潘津炼 廖辉云 《中国高新科技》 2017年第14期24-25,31,共3页
文章研究了不同加量的硼酸酯对制动液的干湿平衡回流沸点、-40℃、100℃运动粘度以及p H值的性能指标变化。实验结果表明:制动液的沸点随着硼酸酯的加量而增大,硼酸酯的加量对制动液的运动粘度影响不大,但当硼酸酯的加量超过35%时,制动... 文章研究了不同加量的硼酸酯对制动液的干湿平衡回流沸点、-40℃、100℃运动粘度以及p H值的性能指标变化。实验结果表明:制动液的沸点随着硼酸酯的加量而增大,硼酸酯的加量对制动液的运动粘度影响不大,但当硼酸酯的加量超过35%时,制动液的p H值不符合标准。 展开更多
关键词 合成制动液 硼酸酯 运动粘度 dot4性能
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Dual-Functional Lithiophilic/Sulfiphilic Binary-Metal Selenide Quantum Dots Toward High-Performance Li-S Full Batteries 被引量:4
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作者 Youzhang Huang Liang Lin +6 位作者 Yinggan Zhang Lie Liu Baisheng Sa Jie Lin Laisen Wang Dong-Liang Peng Qingshui Xie 《Nano-Micro Letters》 SCIE EI CAS CSCD 2023年第5期169-186,共18页
The commercial viability of lithium-sulfur batteries is still challenged by the notorious lithium polysulfides(Li PSs)shuttle effect on the sulfur cathode and uncontrollable Li dendrites growth on the Li anode.Herein,... The commercial viability of lithium-sulfur batteries is still challenged by the notorious lithium polysulfides(Li PSs)shuttle effect on the sulfur cathode and uncontrollable Li dendrites growth on the Li anode.Herein,a bi-service host with Co-Fe binary-metal selenide quantum dots embedded in three-dimensional inverse opal structured nitrogen-doped carbon skeleton(3DIO FCSe-QDs@NC)is elaborately designed for both sulfur cathode and Li metal anode.The highly dispersed FCSe-QDs with superb adsorptive-catalytic properties can effectively immobilize the soluble Li PSs and improve diffusion-conversion kinetics to mitigate the polysulfide-shutting behaviors.Simultaneously,the 3D-ordered porous networks integrated with abundant lithophilic sites can accomplish uniform Li deposition and homogeneous Li-ion flux for suppressing the growth of dendrites.Taking advantage of these merits,the assembled Li-S full batteries with 3DIO FCSe-QDs@NC host exhibit excellent rate performance and stable cycling ability(a low decay rate of 0.014%over 2,000 cycles at 2C).Remarkably,a promising areal capacity of 8.41 mAh cm^(-2)can be achieved at the sulfur loading up to 8.50 mg cm^(-2)with an ultra-low electrolyte/sulfur ratio of 4.1μL mg^(-1).This work paves the bi-serve host design from systematic experimental and theoretical analysis,which provides a viable avenue to solve the challenges of both sulfur and Li electrodes for practical Li-S full batteries. 展开更多
关键词 Dual-functional host Fe_(2)CoSe_(4)quantum dots Shuttle effect Dendrite-free Li anode Li-S full batteries
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瞬态中子输运计算程序的研制 被引量:1
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作者 吴宏春 刘启伟 姚栋 《核动力工程》 EI CAS CSCD 北大核心 2006年第3期11-15,31,共6页
开发编制了基于输运理论的瞬态中子动力学程序DOT4-T。该程序是在二维稳态离散纵标程序DOT4.2基础上开发的,对瞬态中子输运方程中的时间变量直接应用无条件稳定的隐式离散格式。为验证该程序的正确性,对一些一维和二维瞬态基准问题进行... 开发编制了基于输运理论的瞬态中子动力学程序DOT4-T。该程序是在二维稳态离散纵标程序DOT4.2基础上开发的,对瞬态中子输运方程中的时间变量直接应用无条件稳定的隐式离散格式。为验证该程序的正确性,对一些一维和二维瞬态基准问题进行了校核计算,其结果与基准题吻合良好。 展开更多
关键词 中子输运 瞬态 dot4-T 计算
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浅谈汽车制动软问题
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作者 何龙胜 苟军强 +1 位作者 孙自松 杭优 《汽车实用技术》 2021年第7期124-125,共2页
汽车制动性能是考量一种车型的安全系数的最重要因素之一,随着ABS制动、ESP制动的技术革新,可靠性和稳定性得到了稳步提升,制动液的纯度和加注设备的性能对汽车的制动性能有着直接的影响,文章主要针对汽车制动原理及新车制动软问题进行... 汽车制动性能是考量一种车型的安全系数的最重要因素之一,随着ABS制动、ESP制动的技术革新,可靠性和稳定性得到了稳步提升,制动液的纯度和加注设备的性能对汽车的制动性能有着直接的影响,文章主要针对汽车制动原理及新车制动软问题进行研究和分析。 展开更多
关键词 ABS/ESP 泵阀模块 真空助力器 OBDII dot4 真空度 保压 检漏 回吸
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Curtailing Carbon Usage with Addition of Functionalized NiFe2O4 Quantum Dots:Toward More Practical S Cathodes for Li-S Cells 被引量:4
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作者 Ning Li Ting Meng +5 位作者 Lai Ma Han Zhang JiaJia Yao Maowen Xu Chang Ming Li Jian Jiang 《Nano-Micro Letters》 SCIE EI CAS CSCD 2020年第11期1-12,共12页
Smartcombination of manifold carbonaceous materials with admirable functionalities(like full of pores/functional groups,high specific surface area) is still a mainstream/preferential way to address knotty issues of po... Smartcombination of manifold carbonaceous materials with admirable functionalities(like full of pores/functional groups,high specific surface area) is still a mainstream/preferential way to address knotty issues of polysulfides dissolution/shuttling and poor electrical conductivity for S-based cathodes.However,extensive use of conductive carbon fillers in cell designs/technology would induce electrolytic overconsumption and thereby shelve high-energy-density promise of Li-S cells.To cut down carbon usage,we propose the incorporation of multi-functionalized NiFe2O4 quantum dots(QDs) as affordable additive substitutes.The total carbon content can be greatly curtailed from 26%(in traditional S/C cathodes) to a low/commercial mass ratio(~5%).Particularly,note that NiFe2O4 QDs additives own superb chemisorption interactions with soluble Li2Sn molecules and proper catalytic features facilitating polysulfide phase conversions and can also strengthen charge-transfer capability/redox kinetics of overall cathode systems.Benefiting from these intrinsic properties,such hybrid cathodes demonstrate prominent rate behaviors(decent capacity retention with ~526 mAh g^-1 even at 5 A g^-1) and stable cyclic performance in LiNO3-free electrolytes(only ~0.08% capacity decay per cycle in 500 cycles at 0.2 A g^-1).This work may arouse tremendous research interest in seeking other alternative QDs and offer an economical/more applicable methodology to construct low-carbon-content electrodes for practical usage. 展开更多
关键词 Carbon usage reduction NiFe_2O_4 quantum dots Additive substitute Practical S cathode Li-S cells
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Fluorescence Detection for H_2PO_4^- based on Carbon Dots/Fe^(3+) Composite
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作者 范小春 ZHANG Bingyu +2 位作者 丁莉芸 XU Chuang HUANG Jun 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2016年第6期1226-1229,共4页
A novel fluorescent probe for H_2PO_4^- was designed and fabricated based on the carbon dots/Fe^(3+) composite. The carbon dots were synthesized by an established one-pot hydrothermal method and characterized by tr... A novel fluorescent probe for H_2PO_4^- was designed and fabricated based on the carbon dots/Fe^(3+) composite. The carbon dots were synthesized by an established one-pot hydrothermal method and characterized by transmission electron microscope, X-ray diffractometer, UV-Vis absorption spectrometer and fluorescence spectrophotometer. The carbon dots/Fe^(3+) composite was obtained by aqueous mixing of carbon dots and FeCl_3, and its fluorescence property was characterized by fluorescence spectrophotometer. The fluorescence of carbon dots was quenched by aqueous Fe^(3+) cations, resulting in the low fluorescence intensity of the carbon dots/Fe^(3+) composite. On the other hand, H_2PO_4^- reduced the concentration of Fe^(3+) by chemical reaction and enhanced the fluorescence of the carbon dots/Fe^(3+) composite. The Stern-Volmer equation was introduced to describe the relation between the relative fluorescence intensity of the carbon dots/Fe^(3+) composite and the concentration of H_2PO_4^-, and a fine linearity(R2=0.997) was found in the range of H_2PO_4^- concentration of 0.4-12 m M. 展开更多
关键词 H2PO4-detection fluorescence carbon dots/Fe3+ composite
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Construction of novel g-C_(3)N_(4)/β-FeOOH Z-Scheme heterostructure photocatalyst modified with carbon quantum dots for efficient degradation of RhB
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作者 Juhua Luo Xing Liu +3 位作者 Jieliang Gu Wenjie Zhao Minming Gu Yu Xie 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2024年第14期11-19,共9页
The degradation of organic pollutants using semiconductor photocatalysts is a new ecological approach,but the currently available photocatalysts are not very efficient.Herein,in order to obtain efficient visible-light... The degradation of organic pollutants using semiconductor photocatalysts is a new ecological approach,but the currently available photocatalysts are not very efficient.Herein,in order to obtain efficient visible-light photocatalysts,g-C_(3)N_(4)/β-FeOOH-modified carbon quantum dots(CDs)composite photocat-alysts with Z-Scheme charge transfer mechanism were successfully synthesized.The phase composition and morphology of the composite were characterized by X-ray diffraction(XRD),scanning electron mi-croscopy(SEM),transmission electron microscopy(TEM),Fourier transform infrared spectrophotometry(FT-IR),and X-ray photoelectron spectroscopy(XPS)techniques.Due to the upconversion effect of the CDs,the optical response range of the composite was effectively widened,and the optical utilization rate was improved.The Z-Scheme heterostructure not only improves the light trapping ability,significantly inhibits charge-carrier complexation,and realizes the spatial separation of redox sites,but also ensures that the photocatalyst maintains a suitable valence-conductivity band position and maintains the strong redox reactivity.In addition,CDs have the unique characteristics of electronic storage and transfer,which effectively enhance the quantum separation efficiency of the composite.The photocatalytic efficiency was measured by degrading rhodamine B(RhB)under visible light.The degradation performance was the best when the weight ratio of CDs was 6%,and the RhB solution degradation rate reached 100%in 60 min.The unique structure and reliable mechanism provide a way for the development of advanced photocat-alyst. 展开更多
关键词 PHOTOCATALYST DEGRADATION Visible light g-C_(3)N_(4)Carbon quantum dots
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