先驱

The design,cross-linking and pyrolysis of preceramic polymers as well as addition of active filler ,all of which influence the ceramic yield,were analyzed.

针对先驱体转化法陶瓷产率低的问题，从陶瓷先驱体的设计、先驱体的交联工艺、裂解工艺以及活性填料的添加等方面分析了影响陶瓷产率的各种因素，总结出提高陶瓷产率的措施，最后提出今后进一步研究的方向。

Effect of active filler on joining property of silicon carbide to itself by polysilazane;2. The design,cross-linking and pyrolysis of preceramic polymers as well as addition of active filler ,all of which influence the ceramic yield,were analyzed.

针对先驱体转化法陶瓷产率低的问题，从陶瓷先驱体的设计、先驱体的交联工艺、裂解工艺以及活性填料的添加等方面分析了影响陶瓷产率的各种因素，总结出提高陶瓷产率的措施，最后提出今后进一步研究的方向。

In present work, pyrolysis behavior of several preceramic polymers was studied, and various physical and chemical changes which took place while the preceramic polymer-filler systems were being reaction pyrolyzed were investigated, then phase composition, microstructure and properties of the multiphase ceramics were characterized

本论文在单独研究了几种聚合物先驱体的热解行为的基础上，对多个聚合物先驱体+充填剂体系的反应热解过程中的各种物理、化学变化作了深入探讨，继而研究了由此制备的复相陶瓷的相组成、显微结构和性能的形成和变化规律。

Two polysiloxanes (SR2 and P67) and one polycarbosilane were chosen as preceramic polymers. TG-DTA-MS, FT-IR, XRD,〓Si MAS-NMR, SEM, TEM, SAD, HREM, chemical analysis and density measurement techniques were used to study the cross-linking and pyrolysis mechanisms of the preceramic polymers. The development of chemical composition and structure, density, phase composition and microstructure of the solid pyrolyzed products during pyrolysis process were systematically investigated. While pyrolysis temperature approached 1000℃, ceramization process of the preceramic polymers almost completed, and ceramic yield of the preceramic polymers hardly changed any more.

选取了两种聚硅氧烷（SR2和P67）和一种聚碳硅烷作为聚合物先驱体，利用TG-DTA-MS、FT-IR、XRD、〓SiMAS-NMR、SEM、TEM、SAD、HREM以及化学成分分析、密度测量等手段，研究了聚合物先驱体的固化机理；以N〓为热解气氛，系统地考察了各种聚合物先驱体在热解过程中，其热解产物的化学成分和结构、密度、相组成及显微结构的演变规律。

The precursive Fe3O4 films were sulfurized using constant current electrodepositing and oxidation treating, and Fe3O4 films was transformed into FeS2 thin films after heat sulfur annealing of 400℃ at different sulfurizing pressures.

采用恒流电沉积及氧化处理制备Fe3O4先驱体薄膜，再通过400℃下的热硫化退火，使Fe3O4先驱体薄膜在不同硫压下转变成为多晶FeS2薄膜。

So far as the protection of pioneer investors is concerned, Resolution II of UNCLOS on Governing Preparatory Investment in Pioneer Activities Relating to Polymetallic Nodules (hereinafter referred as "Resolution II") stipulates relevant provisions, and the author orderly discusses the definition of pioneer investors, procedures of application and their rights and obligations. Concerning settlement of disputes on overlaps of mine sites, the Preparatory Commission for the International Sea Bed Authority and for the International Tribunal for the law of the Sea (hereinafter referred as "Preparatory Commission") had held series of meetings or sessions with states interested since 1983, and they had signed the 1984 General Understanding, the 1986 Arusha Understanding and New York Understanding, and the 1987 Midnight Agreement. As a result, such agreements had be settled overlapping disputes of mine sites between the first group of applicants and potential applicants.

关於「先驱投资者」之保护，公约《决议二》：「进行多金属结核开发活动之预备性投资」有相关规定，笔者分别就先驱投资者之意义、申请程序及其权利义务作说明；对於申请矿址重叠冲突之争端解决，「国际海床管理局与国际海洋法法庭筹备委员会」（本文简称为海床筹备委员会）於1983年召集各利害关系国举行一连串会议，并签署1984年《一般谅解》、1986年《阿鲁沙谅解》及《纽约谅解》与1987年《午夜协定》，解决「第一批申请者」及「潜在申请者」矿址重叠之问题，同时於1987年年底批准第一批申请者提出之申请，使其具「先驱投资者地位」。

Bumi already has a 19.6% stake in Herald, while Antam has a 10.7% stake in Herald and also holds the remaining 20% interest in Herald''s 80% owned Dairi zinc/lead project in Northern Sumatra.

PT Bumi公司已在先驱资源公司持股19.6％，而Antam公司持有先驱资源公司10.7％的股权，并且持有苏门答腊北部Dairi锌/铅项目20％的股份，该项目余下的80％股份由先驱资源公司持有。

In Indonesia, PT Bumi Resources' higher revised A$ 504.1 million (US$ 484 million) counter bid for Herald Resources (its existing takeover bid was for A$ 445 million) has now been trumped by a higher revised joint counter bid of A$ 524 million (US$ 503 million) from Indonesia?s Antam (PT Aneka Tambang which owns 20% of Herald?s Dairi project) and China?s Shenzhen Zhongjin Lingnan (a leading Chinese zinc/ lead producer).

在印度尼西亚，PT Bumi资源公司将收购澳大利亚先驱资源公司的价格提高到了5.041亿美元，低于印尼Antam公司（PT Aneka Tambang公司持有先驱资源公司旗下Dairi项目20％的股份）和中国深圳中金岭南公司（中国一家领先的锌/铅生产商）提供的5.24亿美元的联合报价。

The PCS fibers at the dose of 0.5MGy are infusible in the process of sintering, at the dose of 3.0MGy the gel content and ceramic yield are 75% and 85.17%, respectively.

吸收剂量为0.5MGy时，PCS先驱丝在热解过程中没有并丝；吸收剂量为3.0MGy时，PCS先驱丝的凝胶含量和陶瓷产率分别达到75%和85.17%。

The results indicate that polyborazine precursor prepared at 150℃ for 10 h and propylamine/isopropylamine molar ratio 2:1, could possess nearly linear molecule skeleton and he prone to melt spinnability. When melt at 90℃, the precursor fibers are prepared with average diameter 10-20μm and BC1.27 N1.52 H structure. After curing process and sintered in NH3 at 1200℃, the near-stoichiometric BN fibers was obtained, which proved this precursor is apt for preparation of BN fibers.

结果表明，当正丙胺／异丙胺摩尔比为2：1，聚合温度为150℃，反应时间为10h时，合成产物具有近似线性分子结构，熔点为90℃，具有良好的成丝性，可获得平均直径10~20μm，组成为BC1.27N1.52H的先驱体纤维，先驱体纤维再经不熔化处理及1200℃氨气高温锻烧等工艺可获得近化学计量比的氮化硼纤维。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。