排序方式: 共有14条查询结果,搜索用时 0 毫秒
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Nazrin S. N. Umar S. A. Halimah M. K. Marian M. M. Najwa Z. W. Jufa M. S. Syahirah M. T. Zuhasanah Z. Azlan M. N. Geidam I. G. Boukhris Imed Kebaili Imen 《Journal of Inorganic and Organometallic Polymers and Materials》2022,32(7):2513-2526
Journal of Inorganic and Organometallic Polymers and Materials - Copper oxide doped TeO2–B2O3 glass system with empirical formula;... 相似文献
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采用共沉淀法制备以Ni为活性组分的Ni-Mg-Al-O高温甲烷化催化剂,考察焙烧温度对催化剂性能的影响。采用N2低温吸附、XRD、H_2-TPR和H_2-化学吸附对催化剂进行表征,并将催化剂用于合成气甲烷化反应。结果表明,焙烧温度高于700℃时,催化剂预还原后织构性能参数变化幅度小。随着焙烧温度的升高,Ni晶粒增大,活性组分与载体之间相互作用增强。焙烧温度700℃时,活性组分分散度最高,催化剂具有优异的低温活性和高温稳定性。 相似文献
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Ce-Zr-Al-Nd2O3 (CZAN) support materials were prepared by co-precipitation and impregnation methods, respectively. They were characterized by X-ray diffraction (XRD), low temperature nitrogen adsorption-desorption, oxygen pulsing technique, H2-temperature pro-grammed reduction (H2-TPR) and X-ray photoelectron spectroscopy (XPS). The Pd-only three-way catalysts (Pd-TWC) supported on these materials were prepared by incipient wetness method and studied by activity tests. The results demonstrated that the CZAN supports obtained by the two methods showed better structural, textural and redox properties than the CZA without Nd2O3, and the addition of Nd2O3 improved the catalytic activity of TWC. Especially, the CZAN-i support prepared by impregnation method had better thermal stability and redox prop-erty. Meanwhile, the Pd/CZAN-i catalyst exhibited the best catalytic performance. XPS measurements indicated that the Nd-modified sam-ples possessed more Ce3+ and oxygen vacancies on the surface of samples, which led to a better redox property. The excellent redox property of support materials helped to improve the catalytic activity of TWC. 相似文献
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介绍了发射药用铝塑复合薄膜袋内包装、纸桶外包装、托盘集装的试验方法和要求,通过技术鉴定确认了这种包装方法可以代替传统的镀锌钢板箱密封包装外套木箱的老式包装,新包装方法的应用取得了明显的经济效益和社会效益。 相似文献
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刷镀技术在汽车大型覆盖件拉伸模上的应用 总被引:1,自引:0,他引:1
1 概述。湖南长丰汽车制造股份有限公司,通过引进日本三菱汽车(PAJERO轻型越野汽车)生产技术,与三菱公司技术合作开发了猎豹三菱汽车。汽车车型代表中国越野汽车的现有水平,该车型的全套冲压模具由长丰委托台湾汽车模具制造商进行制造,模具的生产寿命为20万次,2000年元月全套模具经过验收并投入正式使用,已形成年产量5万台汽车生产能力,在本车型的大型覆盖件拉伸模上,广泛地采用了刷镀技术,通过这一新技术应用既能起到提高模具型面表面硬度和表面光洁度,修复模具拉伤表面的作用,同时降低了模具材料等级及制造成本,取得了良好的经济效益。刷镀技术在汽车大型覆盖件拉伸模上具有广泛的推广价值。 相似文献