共查询到19条相似文献,搜索用时 140 毫秒
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层状氮化硅陶瓷的性能与结构 总被引:8,自引:1,他引:8
从结构设计的角度出发研究了层状复合Si3N4陶瓷材料,利用轧膜使层内的晶粒,晶须产生定向增韧,通过调整外部层状复合结构得到材料的两级增韧效果,并实验制备了高韧性层状复合Si3N4基陶瓷材料。 相似文献
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对近几年有关层状Li-Co-Ni-Mn-O作为锂离子电池新型正极材料的研究进行了系统分析。比较了不同的合成方法及组成对材料性能的影响。其中LiNi1/3Co1/3Mn1/3O2和LiNi0.6CO0.2Mn0.2O2是比较好的。对层状Li-Co-Ni-Mn-O性能的改进提出了进一步改进的措施;认为应该发展低温合成方法,优化和降低Co和Ni的含量,掺杂一种或多种高价金属元素是很有前途的方法。 相似文献
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对近几年有关层状Li-Co-Ni-Mn-O作为锂离子电池新型正极材料的研究进行了分析,比较了不同合成方法及组成对材料性能的影响,并对层状Li-Co-Ni-Mn-O性能提出了进一步改进的措施;认为应该发展低温合成方法,优化和降低Co和Ni的含量,掺杂一种或多种高价金属元素是很有前途的方法. 相似文献
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Saowaluck Bhlapibul Kejvalee Pruksathorn 《Korean Journal of Chemical Engineering》2008,25(5):1226-1231
This research studied the preparation of graphite composite using liquid thermosetting plastic such as polyester resin (POE),
phenolic modified alkyd resin (PhA) and mixed resin (POE with 10% PhA) as a binder. The morphology, physical, electrical and
mechanical properties of the graphite composites were analyzed. The results showed that POE could combine with graphite powder
(the 66% wt. saturated of graphite powder) better than PhA and mixed resin and gave higher electrical conductivity (4.52 S/cm).
It was also found that epoxy resin could improve the mechanical property of composite plate. The addition of TiO2 and ZnSt slightly decreased the electrical conductivity and the water absorption. Moreover, it was proposed that TiO2 could improve the mechanical property. Carbon fiber can increase electrical and mechanical properties and water absorption
of the composite with POE as a binder. The mixing of wet-lay mixture with graphite, carbon fiber and POE composite improved
the mechanical property and decreased the water absorption. 相似文献
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塑料啤酒瓶的制造方案 总被引:5,自引:1,他引:4
介绍了国内外制造塑料啤酒瓶的材料及其加工工艺的现状和发展前景,提出了用PACVD(等离子辅助化学气相沉积)技术与纳米聚合物提高啤酒瓶阻隔性的新成果,指出在国内发展塑料啤酒瓶包装的伟大前景。 相似文献
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The barrier property of polypropylene (PP)/polyamide (PA) blend film produced by the extrusion casting film process was studied
by investigating the effects of rheological properties of each components, compatibilizer content, screw rpm, and the absorbed
moisture, and by performing morphological analysis and permeability modeling. The oxygen barrier property of blend film with
ellipsoidal structure of PA dispersed phase was significantly improved by a factor of 5.4 with the addition of only 20 wt%
PA, when compatibilizer was added by the content of 7 phr and the PP matrix resin and process condition was selected to induce
lower viscosity ratio less than unity. Using Fricke’s model with the value of 19.6 of aspect ratio of the ellipsoid, the permeabilities
of blend films as a function of PA content could be predicted and exhibited a good agreement with the experimental results.
The absorbed moisture had a significant influence on the barrier property of the PP/PA blend system, suggesting that the hygroscopic
PA resin should be incorporated with the high water barrier PP resin by the amount below about 20 wt% to minimize the deterioration
of the barrier property in the humid atmosphere. 相似文献
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冲天炉炉缸用Al2O3-SiC-C质捣打料的研制 总被引:1,自引:0,他引:1
研究了酚醛树脂对冲天炉炉缸用Al2O3-SiC-C质捣打料保存期和施工性能的影响,分析了SiC加入量对材料抗氧化性和抗侵蚀性的影响及作用机理.结果表明加入6%的热塑性酚醛树脂作为结合剂,加入3%的热固性酚醛树脂作为硬化剂时,可使材料同时具有良好的施工性能、烘烤强度和满意的保存期;SiC在高温下发生的氧化-还原反应的最终产物SiO2增加了材料表层的粘度,堵塞了材料表面的气孔,这是SiC能够提高材料抗氧化性和抗侵蚀性的主要原因. 相似文献