Results 111 to 120 of about 1,039 (174)
[Simultaneous determination of seven dimethylcyclosiloxanes in cosmetics of different formulation systems by gel permeation chromatography purification-gas chromatography-tandem mass spectrometry]. [PDF]
Se Pu, 2022 Xiao G, Yuan L, Luo C, Luo X, Huang Y.
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Dianci bileiqi, 2016 研究气相法和沉淀法白炭黑混合使用对复合绝缘子用混炼硅橡胶性能的影响。结果表明,气相法白炭黑的颗粒更小,分散更均匀,跟硅橡胶的结合更好,气相法白炭黑的添加比例越高,混炼胶的工艺性能越好,密度更高,机械性能和电气性能也越好。
郭振芳, 胡雪岩, 薄学微, 张洁
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Dianci bileiqi硅橡胶作为复合绝缘子外绝缘材料，直接影响着绝缘子的运行性能。全面梳理国内主流企业送检的复合绝缘子用硅橡胶材料憎水性能、电气性能和机械性能等试验结果。结合各项性能参数分布情况，分析国内制造现状和现行检测方法，为硅橡胶材料设计和检测提供参考，结果表明：国内硅橡胶材料设计性能满足高压输电需求，但不同厂家的性能参数分散性较大，建议在标准中增加组份分析项以保证胶体含量，并设计多因素试验项目来综合考核材料性能。
杨磊 +6 more
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[Digital aesthetic-driven flowable resin injection restoration]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiLi Y +6 more
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Dianci bileiqi目前对复合绝缘子的热老化研究主要依赖试验方法进行，缺乏热老化过程中材料的微观动态变化认识。文章基于反应力场分子动力学方法，在微观原子层面对复合绝缘子的热解过程开展研究。研究发现，复合绝缘子热老化主要是硅橡胶材料发生Si-CH3、C-H、Si-O断裂，形成的产物主要包含了CH4、C2H4、H2和一些小分子硅氧烷。随着热解的持续，硅橡胶分子结构中新生成的Si-Si、Si-H键的数量不断上升，Si-Si键使得硅橡胶材料的交联度增加，Si-H键易水解形成OH。对老化后的硅橡胶进行介电常数计算发现 ...
刘海林 +4 more
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[Fitness of onlays fabricated with direct and indirect CAD/CAM technology <i>in vitro</i>]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanQian K, Liu Y.
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[Effect of disinfectant with benzethon chloramine and isopropanol as main active ingredients on the accuracy of dental impression]. [PDF]
Beijing Da Xue Xue Bao Yi Xue Ban, 2020 Xu D, Wei DH, Zhang YC, DI P, Lin Y.
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Basic performance of domestic surgical robot and the safety and effectiveness of integrated energy equipment. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue Ban, 2023 Song Z +6 more
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