材料期刊网，材料期刊，材料类期刊，材料期刊投稿

Life Cycle Assessment of Internal Recycling Options of Steel Slag in Chinese Iron and Steel Industry

CHEN Bo , YANG Jian-xin , OUYANG Zhi-yun

The internal recycling process of BOF slag which is one of the huge solid wastes from iron and steel industry was emphasized. Based on the four scenarios of different internal recycling strategies for BOF slag, life cycle assessment (LCA) as a valuable tool for industrial solid waste management was ...

关键词: life cycle assessment , sustainable development , close-loop recycling , steel , BOF slag

Chen系统的状态变量周期性反馈控制

李开明 , 李亚洲 , 冯维贵 , 林长

量子电子学报 doi:10.3969/j.issn.1007-5461.2007.05.014

采用非线性反馈控制,用附加了带参数的正弦项对Chen系统进行了有效的控制.随着参数k的逐渐增大,系统的动力学行为呈现出一系列的变化.数值研究结果表明:随控制参数的增大,驱动信号的强度渐大,混沌系统由混沌运动到周期轨道,最终到一相点.

关键词: 混沌 , Chen系统 , 不动点 , Lyapunov指数 , 反馈控制

CaYO(BO3)3晶体坩埚下降法生长

罗军 , 钟真武 , 范世(马豈) , 王锦昌

人工晶体学报 doi:10.3969/j.issn.1000-985X.2000.01.005

本文首次报道了Ca4YO(BO3)3(YCOB)晶体的坩埚下降法生长.在1600～1650℃炉温下,固液界面处的纵向温度梯度为40～60℃/cm,以0.2～0.6mm/h的生长速率,在近封闭的Pt坩埚中生长出了直径达25mm、长度超过50...

关键词: 布里奇曼法 , Ca4YO(BO3)3晶体 , 非线性光学材料 , 包裹体

Synthesis, structure and magnetic properties of Fe-Gd nanocapsules coated with B2O3/H3BO3 and Fe3BO5+GdBO3

Physica B-Condensed Matter

Nanocapsules consisting of B2O3/H3BO3 encapsulating Fe-Gd cores have been synthesized by an arc-discharge process using metal-boron alloys as cathode. Most of the nanocapsules have a well-constructed shell/core structure with a uniform B2O3/H3BO...

关键词: nanocapsules;transmission electron microscopy (TEM);X-ray;photoelectron spectroscopy (XPS);magnetic properties;arc-discharge;boric-acid;boron;carbon;oxide;nanoparticles;particles;diborane;iron