Q.F. Meng
,
K.R. Liu
,
L. Jiang
,
Q. Han
,
J.S. Chen
,
X.J. Wei
金属学报(英文版)
The nano-crystal composite WO3-TiO2 photocatalyst was prepared by ultrasonic assisted sol-gel process. The e®ects of various factors, such as the crystal form, the
substrates, the pH, the dissolved oxygen and the ultrasonic on the photocatalytic activity were investigated in view of the photodegradation of Rhodamine B. The results
show that the crystal form of WO3-TiO2 film with highest photocatalytic activity is
rutile. The introduction of ultrasonic to the course of preparation can accelerate the
deposit time of the sol and increase the photocatalytic activity signi¯cantly in view of
the highest photodegradation of Rhodamine B being 72.7% in 5 hours. The porous
titanium plate is the most suitable substrate in four kinds of investigated materials.
Meanwhile the smaller the pH and the higher the concentration of the dissolved oxygen
in the solution is, the higher the photodegradation is.
关键词:
ultrasonic
,
null
,
null
,
null
郑桂丽
,
姜丽
,
张志东
液晶与显示
doi:10.3969/j.issn.1007-2780.2010.06.001
根据Erickson-Leslie流体动力学理论,研究了混合排列向列相-共面转换液晶盒的引流效应.在强锚定边界条件下,经过理论推导,得出液晶指向矢与流速的关系方程,进一步通过数值计算得出指向矢分布与时间的关系.发现引流效应加快了指向矢达到平衡态的速度,而且破坏了指向矢分布的瞬态对称性,特别在加电压的初始几毫秒这种现象非常明显.
关键词:
混合排列向列相
,
共面转换
,
引流效应
,
指向矢分布
余宏伟
,
王世森
,
王孝东
,
洪君
物理测试
针对鄂钢轧制的部分宽厚板表面出现结疤现象,应用金相显微镜、扫描电镜和能谱分析仪对Q345q热轧态钢板表面疤状物形态和成分进行观察,对形成原因进行分析并提出改进措施。结果表明：疤状缺陷为块状的非金属夹杂/渣,并在钢板表面形成凹坑,其成分为含有Si、Ti、Al、Ca、Mg的氧化物或硅酸盐、铝酸盐等,其主要为炼钢过程中的脱氧产物和合金的氧化产物。因此在生产过程中,通过去除钢水中夹杂物和清理铸坯等,减少非金属夹杂/渣,以提高钢板表面质量。
关键词:
Q345q
,
疤状缺陷
,
钢板
,
非金属夹杂
,
非金属夹渣
WANG Lei
,
GAO Cai-ru
钢铁研究学报(英文版)
Thermal mechanical control processing (TMCP), the combination of controlled rolling and controlled cooling, provides a powerful means of developing high-strength low alloy (HSLA) steels by intensive microstructural control. In the present investigation, the effects of TMCP parameters, consisting of the finish cooling temperature and the start rolling temperature in non-recrystallization region, on the final microstructure and mechanical properties of Q460q steel have been studied by tensile, Charpy impact tests, optical microscopy. The TMCP parameters for Q460q steel have been optimized by laboratory experiments. And the microstructure and properties of industrial product were coincident with the results of laboratory experiments.
关键词:
;TMCP;mechanical properties;M/A constituent;Q460q steel
王小华
,
撒世勇
,
侯发臣
,
张义涛
材料开发与应用
doi:10.3969/j.issn.1003-1545.2009.02.011
桥梁结构复杂,构件制作时需大量采用焊接,焊接的方法主要是埋弧自动焊,为了验证321-Q370q复合板能否满足桥梁用钢的焊接要求,对复合板埋弧焊接头进行了一系列性能试验.试验结果表明,焊接接头各项性能均能满足相关标准要求.
关键词:
321-Q370q复合板
,
埋弧自动焊
,
性能试验
