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空心漂珠是近几年开发的新型节能材料,以逐渐被人们所认识、利用。在高温耐火、隔热保温、塑料、橡胶、建材、交通、石油固井等行业广泛应用。生产保温冒的一个关键问题是,寻求和选择优质的耐高温、隔热、保温材料,空心漂珠具备这一多功能特性并能胜任这一要求,只要采用科学的配比和工艺,就可以制成漂珠保温冒系列产品。实践证明,用漂珠生产的保温冒性能优于各类——高温水泥冒口、陶粒冒口、石英粉冒 相似文献
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以钾长石和粉煤灰漂珠为主要原料,矾土为调质剂,在空气气氛下经900~1 150 ℃保温1 h制备得到轻质隔热材料,并研究了烧成温度与矾土含量对轻质隔热材料服役性能的影响规律及作用机理。结果表明,通过提升烧成温度或增加矾土含量,能够有效优化轻质隔热材料的常温物理性能。当烧成温度为1 100 ℃、调质剂矾土质量分数为20%时,试样具有最佳物理性能,其体积密度约为(0.97±0.01) g·cm-3,真气孔率约为(63.7±0.5)%,常温耐压强度达到(9.42±0.21) MPa,同时其300 ℃和600 ℃下的高温热导率分别约为0.147 W/(m·K)和0.229 W/(m·K),与一般轻质隔热材料相比同样具有优异服役性能,且制备成本较低。 相似文献
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介绍了巴什基尔斯克建筑材料工业设计研究院在不同工业企业中使用磷酸盐结合的陶瓷材料和耐火材料的经验。 相似文献
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粉煤灰漂珠活化处理废水的研究 总被引:5,自引:0,他引:5
本文叙述了用H2SO4活化制作粉煤灰活性漂珠的工艺及活化漂珠对有机物和无机离子吸附的机理;通过活化漂珠对废水中COD的吸附去除试验,分析了影响其吸附性能的各种因素;比较了分别用H2SO4和ZnCl2进行活化后漂珠的吸附性能,实验研究了活化漂珠对废水中COD的吸附容量和金属离子的吸附效率,得到了较满意的结果。 相似文献
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The optimization of process parameters and hardening equipment for glass insulator parts that have nonuniform thickness and
complex configurations is described. Technical solutions that improved the quality and reliability of insulators are considered.
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Translated from Steklo i Keramika, No. 4, pp. 10–12, April, 2006. 相似文献
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我公司设备、管道及阀门的保温一直采用岩棉、珍珠岩、泡沫石棉、玻璃棉等材料,外用铁丝网或玻璃丝布缠绕和水泥抹面,存在保温性能差、使用寿命短和施工不便等缺点,对外型复杂的设备、阀门等更难以施工。2001年,我公司在造气废热锅炉、缓冲罐、造气炉夹套等设备及蒸汽管道上使用了SAM保温材料,取得了较为理想的效果。 相似文献
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通过对几种体系胶粘剂的试验,确定了改性环氧胶作为耐高温柔软复合绝缘材料(简称NHN)的胶粘剂、并经反复实验,找出最佳的复合工艺参数,从而研制出了温度指数为194℃、热态粘合性优异的NHN产品。 相似文献
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Investigation on process parameters of electrospinning system through orthogonal experimental design
Electrospinning is a very simple and versatile method of creating polymer‐based high‐functional and high‐performance nanofibers. But most of the investigations are not systematic and describe the electrospinning process without quantitative accuracy. Inconsistent and even opposite results have been reported, which has hindered the consistent interpretation of the experiments. Orthogonal experimental method was used to investigate qualitative and quantitative correlations between fiber characteristics (diameters and morphologies) and the processing and materials parameters. Uniform fibers can be obtained without any beads by proper selection of the processing parameters, and a lower glass transition temperature was observed for electrospun fibers than that of native polymer. Results of statistical analysis showed that significant influences were observed for polymer molecular weight and solution concentration on fiber diameters, and there were significant effects of polymer molecular weight, solution concentration, and solvent system on fiber morphologies. Meanwhile, solution concentration and polymer molecular weight, and polymer molecular weight and solvent system had obvious interaction effects. Regression analysis revealed quantitative relations of fiber diameters and beads percent, that is, Y1 = 72.8X1 ? 8.1X2 + 138.8, Y2 = ?3.2X1 + 0.4X2 + 60.5, where Y1 is fiber diameter (nm), Y2 beads percent (%), X1 solution concentration (%, w/w), and X2 polymer molecular weight (kDa). Validation test showed that the experimental values of fiber size and beads percent were in good agreement with the calculated ones. Based on these results, optimal conditions could be obtained for predetermined diameters and morphologies for electrospun fibers. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3105–3112, 2007 相似文献
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《应用化工》2022,(Z1)
为了考察脂肪酸甲酯的热稳定性是否满足作为绝缘油的要求,本文以市售大豆油为原料油,通过KOH催化酯交换反应(醇油摩尔比为9,催化剂添加量为2%,反应时间为1 h,反应温度为65℃)制备大豆油甲酯。利用热重分析平台,在不同线性升温速率下,对比分析矿物绝缘油和大豆油甲酯热解特性。并基于等转化率法,采用Flynn-Wall-Ozawa和Kissinger-Akahira-Sunose两种非预置模型分别计算矿物绝缘油和大豆油甲酯的热解活化能。最后,利用Avrami理论计算了二者的热解反应级数。结果表明,甲酯热解起始温度和终止温度均高于矿物绝缘油,同时热解活化能也高于矿物绝缘油,表明甲酯热稳定性优于矿物绝缘油。 相似文献