武钢1700热连轧带钢板形控制

本文介绍了武钢1700热连轧带钢厂近十年来为改善带钢板形质量在抓技术进步,完善设备管理,提高操作水平和试制检测装置上所进行的工作并初步取得成效,使板形废品由1981年的2.52％,下降到1990年0.10％。     

RH钢水二次精炼法的发展

本文综述了RH真空脱气法30年来的发展概况,介绍了RH法在超低碳和超低碳氮钢生产中的效果,多功能RH精炼法的发展现状,以及RH法用于精炼不锈钢、轴承钢以及作为钢的高纯度化精炼方法的优越性。还简要介绍了一些在RH精炼过程中的加热方法。     

微生物单井处理技术室内研究

针对英雄滩油田大35块的具体情况，筛选出了3株耐温试验菌。该试验菌组性能优良，并且皆能在加有一定量有机成分的大35块地层水中正常生长、繁殖及代谢。用该菌组处理后，大35块原油的流动性明显改善。在现场试验的20口油井中，共有12口井见到了增油效果，提高了原油产量。     

A universal ion implantation model for all species intosingle-crystal silicon

A physically based model for ion implantation of any species into single crystal silicon has been developed, tested and implemented in the ion implant simulator, UT-MARLOWE. In this model, an interpolation scheme, based on mathematical properties of ion-target interatomic potential, was employed and implemented to calculate the scattering process. Using this scheme, the resulting energy, direction and momentum of the ion and target can be derived from the existing scattering tables of UT-MARLOWE without calculating the entire scattering process. The method has advantages in terms of both accuracy and computational efficiency, as well as significantly reduced cost of code development. The impurity profiles and damage profiles predicted by the model simulations have been compared with secondary ion mass spectroscopy (SIMS) and Rutherford backscattering spectrometry (RBS), and excellent agreement with experimental data has been achieved     

An accurate method of iodometric titration to measure copper valence of high-T c superconductors

The double iodometric titration is the method widely used to determine copper valence of high-T _c superconductors. There are some problems that remain to be solved, and certain procedures are used: adding KSCN to release adsorbed iodine, adding HN₄HF₂ to eliminate the interference of some dopants, and using a new calculating equation to accurately calculate experiment results. Al- and Fe-doped samples were prepared and their copper valence, 2 +p, was determined by the improved double iodometric titration method. With these samples, how to use the above procedures to improve experiment results is discussed. We find that the iodometric titration method described here can be used to determine copper valence and oxygen content for doped and undoped samples with high accuracy.     

GaN材料生长研究

用常压ＭＯＣＶＤ方法我们在蓝宝石（０００１）、Ｓｉ（１１１）衬底上，成功地制备出ＧａＮ单晶薄膜材料，取得了ＧａＮ材料的初步测试结果。纯度ＧａＮ为ｎ型，载流子浓度为１０１７～１０１８ｃｍ－３，迁移率为２００～３５０ｃｍ２／Ｖ·ｓ，双晶衍射半峰宽为７′，室温ＰＬ光谱本征发光波长为３７０ｎｍ，并首次观察到掺ＺｎＧａＮ呈ｐ型电导。     

水工用聚氨酯材料

本文介绍了水利、水电工程用聚氨酯材料的种类、配方、性能、应用和发展趋势     

乳氟禾草灵防除大豆田阔叶杂草

１９９６年２４％乳氟禾草灵乳油防除大豆田阔叶杂草。阜同、含山两地试验表明，每公顷用６００－７５０毫升乳氟禾草灵油３０天株防效在８５．６－１００％，鲜重防效为８４．７－１００％，乳氟禾草灵为大豆田理想的阔叶除草剂。     

新型流化床颗粒层过滤器流化特性的研究

介绍分析了新型流化床颗粒层过滤器的特点，三维流化床颗粒层过滤器冷态实验台的有关参数，以及在冷态实验台上进行的流化特性试验的初步结果，并对流化床颗粒层过滤器可接受的运行操作范围进行了讨论。这为进一步进行效率试验、结构优化试验奠定了基础