材料期刊网

THE DEVELOPMENT OF MINOR CALIBER COMPOSITE PIPES ON CORROSIVE WEAR RESISTANT

S.H. Li , J.S.Li , S.X. Wang , Y.J. Yin and J.J. Wang Ordnance Engineering College , Shijiazhuang 050003 , China

金属学报(英文版)

The ceramic lined pipes had been produced by gravitational separation SHS method and influential factors on combustion synthesis was investigated.The experimental results showed that the ceramic lined pipes had been produced easily under condition that selecting pipes well distributed on the wall thickness ,proper preheating temperature and appropriate additive.

关键词: gravitational separation SHS method , null , null , null

H2S应力腐蚀试验用H2S气通设计

孙耀峰

腐蚀学报（英文） doi:10.3969/j.issn.1002-6495.2001.z1.007

在满足H2S应力腐蚀试验的试验条件下,设计了H2S应力腐蚀实验室中H2S气体的通气装置.设计方案切实易行,安全可靠;实现了出口H2S气体的吸收再利用,减少了对环境的污染.

关键词: H2S气体 , 设计方案 , H2S应力腐蚀试验 , 环境保护

A flexible nanostructured sulphur-carbon nanotube cathode with high rate performance for Li-S batteries

Energy & Environmental Science

We report the template-directed synthesis of sulphur-carbon nanotubes and their use to form a membrane that is binder-free, highly conductive and flexible. This nanostructured membrane is used as a self-supporting cathode without metal current-collectors for Li-S batteries. The membrane cathode has a high electrical conductivity and renders a long life of sulphur of over 100 charge-discharge cycles. High discharge capacity of sulphur was attained at 712 mA h g(sulphur)(-1) (23 wt% S) and 520 mA h g(sulphur)(-1) (50 wt% S) at a high current density (6 A g(sulphur)(-1)). The overall capacity of the flexible cathode correspondingly reaches 163 mA h g(-1) (23 wt% S) and 260 mA h g(-1) (50 wt% S). These results demonstrate the great potential of this nanostructured flexible membrane as a cathode for Li-S batteries with fast charge-discharge performance and long life.

关键词: rechargeable lithium batteries;positive electrode materials;cell;temperature;composites;capacity;oxide

Effect of Li(3)N additive on the hydrogen storage properties of Li-Mg-N-H system

Journal of Materials Research

The effect of Li(3)N additive on the Li-Mg-N-H system was examined with respect to the reversible dehydrogenation performance. Screening Study with varying Li(3)N additions (5, 10, 20, and 30 mol%) demonstrates that all are effective for improving the hydrogen desorption capacity. Optimally, incorporation of 10 mol% Li(3)N improves the practical capacity from 3.9 wt% to approximately 4.7 wt% hydrogen at 200 degrees C, which drives the dehydrogenation reaction toward completion. Moreover, the capacity enhancement persists well over 10 de-/rehydrogenation cycles. Systematic x-ray diffraction examinations indicate that Li(3)N additive transforms into LiNH(2) and LiH phases and remains during hydrogen cycling. Combined structure/property investigations suggest that the LiNH(2) "seeding" should be responsible for the capacity enhancement, which reduces the kinetic barrier associated with the nucleation of intermediate LiNH(2). In addition, the concurrent incorporation of LiH is effective for mitigating the ammonia release.

关键词: complex hydrides;improvement;mixtures;imides;amide;h-2

Li_2S-GeS_2-LiI和Li_2S-GeS_2-LiBr-LiI系统玻璃的电导率

杨如玺

材料研究学报

实验得知0.5Li_2S-0.5GeS_2玻璃的电导率高于0.4Li_2S-0.6GeS_2玻璃的电导率。当在这两种组成的玻璃中分别掺杂LiI 后,则后者的电导率可高于前者。在0.4Li_2S-0.6GeS_2玻璃中同时掺杂LiBr 和LiI 后,其电导率约为掺杂一种同量盐玻璃电导率的两倍。本文用弱电解质理论解释了Li_2S-GeS_2玻璃经掺杂LiBr 和LiI 后电导率变化的原因。

关键词: 解离常数 , activity , ameliorator(modification) , organisator(formation) , transition temperature(transus temperature).

炼油工业中H_2S的腐蚀

郦建立

腐蚀学报（英文）

综述了含H2 S介质中材料的各种腐蚀形态 ,阐述了H2 S腐蚀发生的机理和影响因素 (外部环境 ,材料条件等 ) .介质温度和浓度对腐蚀有较大的影响 ;腐蚀过程中析出的H是引起SSCC的重要因素 ;硬度、夹杂和带状组织降低材料对H2 S腐蚀开裂的阻力 .

关键词: 硫化物应力腐蚀 , hydrogen induced cracking

H2S分压对油管钢CO2/H2S腐蚀的影响

张清 , 李全安 , 文九巴 , 白真权

腐蚀学报（英文）

1974-），男，硕士研究生，研究方向为腐蚀与防护.〖ZK)〗 Tel：0379-4231846〓E-mail：FQ)〗〖HT〗〖HJ〗〖HT5”SS〗 〖JZ(〗〖HT2H〗〖STHZ〗〖WTHZ〗 采用高温高压釜，辅以失重法和扫描电镜，对不同H2S分压下(1.4 kPa,20 kPa,60 kPa,120 kPa)油管钢N80、P110的CO2/H2S腐蚀进行了研究.结果表明，在试验H2S分压范围内，随着H2S分压的升高，两种钢的腐蚀速率先增后降，且都在H2S分压为20 kPa时取得最大值. 

关键词: H2S分压 , null , null , null

C-S-H 凝胶及其研究方法

杨南如

硅酸盐通报 doi:10.3969/j.issn.1001-1625.2003.02.011

在分析C-S-H凝胶的复杂性和特征的基础上,就测定它的化学组成、C-S-H凝胶中[SiO4]4-四面体的聚合度及其结构的化学和物理的方法作了简要介绍.现代各种测试方法的出现和使用,对C-S-H凝胶的组成和集中[SiO4]4-四面体的聚合结构有了较为完整的概念.

关键词: C-S-H凝胶 , 化学组成 , 凝胶结构 , 测定方法

H2S分压对油管钢CO2/H2S腐蚀的影响

张清 , 李全安 , 文九巴 , 白真权

腐蚀学报（英文） doi:10.3969/j.issn.1002-6495.2004.06.015

采用高温高压釜,辅以失重法和扫描电镜,对不同H2S分压下(1.4 kPa,20 kPa,60 kPa,120kPa)油管钢N80、P110的CO2/H2S腐蚀进行了研究.结果表明,在试验H2S分压范围内,随着H2S分压的升高,两种钢的腐蚀速率先增后降,且都在H2S分压为20 kPa时取得最大值.

关键词: H2S分压 , N80钢 , P110钢 , CO2/H2S腐蚀速率

Li-N-H共掺法制备 p型 ZnO薄膜

卢洋藩 , 叶志镇 , 曾昱嘉 , 陈兰兰 , 朱丽萍 , 赵炳辉

无机材料学报 doi:10.3724/SP.J.1077.2006.01511

采用Li-N-H共掺技术在玻璃衬底上生长p型ZnO薄膜. XRD结果表明共掺ZnO薄膜具有高度cll轴取向, Hall测试表明薄膜的电阻率为25.2Ω·cm, Hall迁移率为0.5cm²/(V·s), 空穴浓度为4.92×10¹⁷/cm³. 此外, p-ZnO薄膜在可见光区域具有90%的高透射率.

关键词: p-ZnO , magnetron sputtering , codoping