共搜索到3075条信息,每页显示10条信息,共308页。用时:0小时0分0秒281毫秒
固相含量对氧化钇稳定氧化锆性能的影响 仝建峰1,陈大明1,刘晓光1,李国军1 (1.北京航空材料研究院,先进复合材料国防科技重点实验室,北京,100095) 摘要:主要研究料浆固相含量对氧化钇稳定氧化锆料浆流变性质,以及YSZ的微结构,密度和强度的影响规律,并分析讨论其原因.结果表明不同固相含量的氧化钇稳定氧化锆料浆表现为剪切变稀的特征,随固相含量增加,坯体密度增加,强度降低,而烧结体密度是先增加后减少的,固相含量为53%(体积分数)时,坯体比较均匀,气孔少. 关键词:固相含量; 流变性质; 水基注模凝胶; 氧化钇稳定氧化锆; 水基料浆; 气孔; solids loading; rheological properties; aqueous gel-casting; yttria-stabilized zirconia; aqueous slurries; pores; [全......
of suspension bridges under random traffic flow based on the first-passage criterion XIAO Xinhui1, 2, 3, LU Naiwei1, LIU Yang1, GUO Xin3 (1. School of Civil Engineering and Architecture... and safety level of stiffening girders for long-span suspension bridges considering the actual vehicle states, the vehicle involving vibration and the dynamic reliability indices were studied based......
Trans. Nonferrous Met. Soc. China 24(2014) 2393-2400 Near net shape casting process for producing high strength 6xxx aluminum alloy automobile suspension parts Shi-jie GUO, Yi XU, Yi Han, Jin-yan LIU, Guan-xia XUE, Hiromi NAGAUMI Suzhou Research Institute for Nonferrous Metals, Suzhou 215026, China Received 17 October 2013; accepted 5 May 2014 Abstract: The automobile suspension parts of a high......
多孔高分子微球的制备研究 周锦鑫1,刘思思1,周虹峰1,顾顺超1 (1.上海交通大学化学化工学院化工系,上海,200240) 摘要:以苯乙烯,二乙烯苯为单体,引入混合溶剂作为致孔剂,采用悬浮聚合的方法制备了多孔交联聚苯乙烯微球,并通过有机萃取等方法带出致孔剂,形成永久性大孔.分析了搅拌速度,分散剂用量,致孔剂等因素对微球粒径分布和孔比表面积的影响,研究了不同工艺条件下的微球形态.结果表明,转速在180r/min左右,分散剂质量分数在0.15%左右时,可以制得粒径范围为0.2~0.8mm的聚苯乙烯微球,且微球具有良好的粒径分布.采用石蜡/甲苯,石蜡/乙酸乙酯为致孔剂时,可以形成纳米级小孔,且当石蜡/甲苯用量为86%时,孔比表面积可达到33.07m2/g,并随着交联剂用量的增加而增大. 关键词:悬浮聚合; 多孔微球; 粒径分布; 孔比表面积; suspension......
with multiple impellers[J]. Chem Eng Commun, 2006, 193(7): 801–825. [11] VAN DER WESTHUIZEN A P, DEGLON D A. Solids suspension in a pilot-scale mechanical flotation cell: A critical impeller speed correlation[J...一致.图7(a)~(d)显示,PBT6,A310,HEDT和HEDT-A310预测值与实验结果的误差分别小于25%,30%,10%和20%.显然,本文推导的关系式同时适用于轴向桨和径向桨. 图4 搅拌桨净空高度对离底悬浮转速的变化趋势 Fig. 4 Change trend of just suspension speed via impeller clearances......
of anisotropic fluid, influence of un-symmetric stress tensor on material functions, vibrational shear flow of the fluid with small amplitudes and rheology of anisotropic suspension were reported. A new... of fluid, such as stability of hydrodynamic flow and orientational motion, were discussed. The results show that the polymer suspension systems exhibit anisotropic character. The PNC systems can exhibit......
......
characteristics of suspension insulator in Hunan Province JIANG Zidan1, JIANG Xingliang1, JIANG Yanru2, LI Yongfu3 (1. State Key Laboratory of Power Transmission Equipment & System Security and New... Co. Electric Power Research Institute, Chongqing 401123, China) Abstract: In order to study the natural contamination characteristics of 500 kV line suspension insulator, the test insulator string......
closes to 99.5%. Compared with raw ore, the leaching capacity of roasted ore is greatly improved. Key words: high sulfur bauxite; high solid-gas ratio; suspension roasting; consecutive experiment...轴向温度.投料前对所有测温,测压,测流量和烟气成分分析仪器进行了标定,保证所有检测仪器工作性能正常. 图2 悬浮焙烧炉温度测点的布置图 Fig. 2 Arrangement plan of temperature points of suspension calciner 2.2 试验方法 2.2.1 焙烧试验方法 高固气比悬浮态焙烧-快速冷却试验......
......