共查询到20条相似文献,搜索用时 93 毫秒
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研究了基质相组成,对莫来石-刚玉窑具性能的影响.研究发现:基质相对窑具的性能影响较大,硅线石的加入可以提高窑具的常温强度和高温强度,莫来石生粉加入可以提高窑具的抗热震性. 相似文献
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采用原位合成技术合成莫来石一钛酸铝复相材料(ATM),并以复相材料和烧结莫来石(M60)为主要原料制备莫来石一钛酸铝窑具,借助于XRD、SEM和热态模拟试验等手段研究了烧成温度、复相材料添加量对莫来石-钛酸铝高温窑具性能和显微结构的影响.结果表明:合成的莫来石-钛酸铝复相材料适于制备高温窑具;在1 600℃烧成的窑具试样具有较高的高温抗折强度和良好的抗热震性;合成复相材料的添加量为45%时可获得综合性能好的窑具材料;热态模拟试验表明研制的莫来石-钛酸铝高温窑具适合在低于1 400℃,承重小于8 kg的条件下使用. 相似文献
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为了开发具有更高抗热震性的陶瓷窑具,以优质碳化硅为原料,含Si、O、C、H元素的改性树脂为结合剂,研制了不烧改性树脂结合碳化硅材料,并重点对该材料的抗热震性、高温荷重变形性、高温抗折强度进行了试验研究。结果表明:该碳化硅材料具有非常好的抗热震性、高温强度和很好的抵抗高温载荷的能力,在陶瓷窑具等温度波动大的环境下应该有很好的应用前景。 相似文献
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以莫来石和电熔白刚玉或板状刚玉为骨料,氧化铝粉、氧化硅粉、红柱石粉为基质料,纸浆为结合剂,同时以≤0.15 mm(100目)的刚玉细骨料取代较粗(1~0.15 mm或0.5~0.15 mm)的刚玉骨料,制备了2个系列、不同粒度级配的刚玉-莫来石试样,并分别以抗折强度保持率和弹性模量保持率为评价指标,研究了刚玉骨料种类和粒度对刚玉-莫来石材料性能的影响。结果表明:1)分别以白刚玉和板状刚玉为骨料时,刚玉-莫来石材料热震后的弹性模量保持率与抗折强度保持率并不完全一致;2)以≤0.15 mm骨料代替较粗骨料,虽能提高材料强度,但可能会降低其抗热震性能。分析认为:刚玉-莫来石材料抗临界危险裂纹扩展能力与材料热震强度保持率一致,相对于弹性模量保持率,以强度保持率作为此类材料抗热震性的评价标准更为合适;由于板状刚玉骨料周围残余应力的存在,热震实验后以板状刚玉为骨料的刚玉-莫来石材料具有更高的抗折强度保持率。 相似文献
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为了改善高温气体过滤器支撑体的强度及抗热震性能,根据复合材料韧化强化原理,本试验采用陶瓷材料复合技术,制备莫来石-刚玉-钛酸铝-堇青石复合陶瓷材料,探索其作为高温过滤器支撑体的可能性.以粒径小于74μm的高铝矾土熟料、钛酸铝、堇青石为原料,以聚乙烯醇的溶液(质量浓度2%)为结合剂,试样成型压力为50MPa,烧结温度为1360℃,保温3小时制备了莫来石-刚玉-钛酸铝-堇青石复合材料.对烧后试样进行体积密度、气孔率、常温抗折强度、抗热震性的测定及XRD、SEM的分析,研究了配料组成对复合材料烧结及抗热震性能的影响.研究结果表明:具有较好烧结性能与抗热震性能的莫来石-刚玉-钛酸铝-堇青石复合材料支撑体的最佳物料配比(%)为:高铝矾土熟料30%、钛酸铝10%、堇青石60%. 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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A perturbation viscometer is a differential capillary viscometer that measures the logarithmic viscosity gradient of the viscosity-composition curve for gas mixtures. Measurements are made at different gas mixture compositions. Integration of the logarithmic viscosity gradients measured over the full composition range gives the mixture viscosity relative to the viscosity of one of the pure components of the gas mixture. This method is attractive because, for measurements of equal precision, integration of the gradients is potentially an order of magnitude more precise than measurement of the viscosities directly. It can also work at high and low temperatures and perhaps high pressures.The perturbation viscometer has been used to make measurements on ideal gas mixtures at ambient and elevated temperatures. The situation is more complicated when the gas mixtures are non-ideal. Extra effects due to density differences, molar volume change on mixing and differential thermal expansion may be measured in addition to the desired viscosity change producing systematic errors in the results. Thus, a more sophisticated apparatus is required. The standard perturbation viscometer has been modified to separate out the extra effects to permit measurement of the true change in viscosity. In addition, the theoretical operation of the modified apparatus has been revised to account for the design changes to permit calculation of the viscosity-composition profiles from the results.The apparatus has been tested using helium-HFC-125 mixtures and two new viscosity-composition profiles are presented for these mixtures at 23 and . Internal consistency tests have been used to confirm that the data produced are of high quality with an estimated uncertainty in the viscosity ratio data at of 0.9% and at of 1.5%. 相似文献
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塔设备改造选型的分析 总被引:2,自引:0,他引:2
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。在评述目前国内常用的几种塔板和新型填料之后,着重介绍一种新型塔板(导向梯形浮阀塔板)和一种新型填料(波环填料——乾隆帕克)。 相似文献