大腔体人造金刚石合成工艺的研究

分析了我国现阶段金刚石的合成工艺－φ23mm腔体工艺的基础上，利用变功率合成技术和瓶颈效应后改变组装方式，使腔体内的物量比合理化，以达到腔体内合成温度和压力均匀，控制金刚石的生长速度，在较低的合成压力和合成功率下，在φ28.5mm腔体和φ31mm腔体上，合成优质高产金刚石。     

青田山口叶蜡石传压介质初步研究

采用青田山口叶蜡石作为超高压高温合成金刚石的传压介质，分析了其主要化学成分和矿物组成。对青田山叶蜡石粉压块粒度效应进行了研究，确定了该传压介质的粒度组成。超高压高温人造金刚石试验表明，青田山口叶蜡石的传压介质理想，金刚石合成效果较好。     

冷坩埚熔壳法生产立方氧化锆宝石

至今 ,自然尚未找到立方氧化锆矿石或矿床 ,它是天然氧化锆 (单斜相 )在一定条件下产生相变 ,经四方相、六方相而转变为具原子最紧密堆积的立方相的。随着相变的产生 ,其性能也发生转变 ,立方相氧化锆具有折射率高 (2 1 5-2 2 3 )、色散大 (0 0 6)、硬度较高 (摩氏 8 0 -8 5 )、化学稳定性好等特性。因为钻石的折射率为 2 42 ,色散为 0 0 44 ,所以若把二者琢磨成相同的戒面 ,其综合效果非常相似。因此 ,立方氧化锆成了钻石最佳的代用品 ,目前 ,用冷坩埚熔壳法已成功地生产出立方氧化锆。立方氧化锆的相变温度为 2 3 70 -2 75 0℃ ,要使…     

人造气液包裹体方法及其在研究热液性质中的应用

人造气液包裹体方法在研究热液的物理化学性质方面较传统方法简便、易行。它可用于研究热液的等容线、不混溶性质及矿物在热液中的溶解度。本文解释了人造气液包裹体的合成方法和人造气液包裹体方法的原理,分述了应用此方法研究热液所取得的最新成果。此法不仅能用于研究热液的性质,也能用于其它方面的研究,具有广阔的前景。     

分离并回收合成片中人造金刚石和触媒金属的方法及装置

设计钛阳极篮和钛阴极板组成电解装置，取代了传统的盐酸电解法中以玻璃钢篮加石墨铜棒的阳极装置和以铁板作阴极板的阴极装置，并将盐酸电解液改变为以硫酸镍为主盐的酸性电解液，在一定的工艺条件下，电解速度提高了三倍，同时可在阴极上回收纯度较高的镍钴合金板，阳极上回收二氧化锰。镍钴金属回收率达９０％￣９４％，纯度在９７％￣９９％。电流效率达６６％￣８５％，电解时无有害气体及废水排放。     

宝石采撷

l矿物物理性质1.1刚玉,硅硼钙石,透辉石,硬水铝矿(见表】)。 表l矿物物理性质物理性质刚 玉硅硼钙石透辉石(Diopside)硬水铝矿 成分 晶 系 硬度 比重‘ 折射率 颜色 解理 断 口 透明度 光泽 荧光A120 3六方棱形晶系红,蓝,绿,黄,橙,棕,紫无,但有菱形分离贝壳状透明到不透明象玻璃有红,橙,黄,通常为橙色有摩擦发光现象CaBSiOI(oH)单斜晶系5—5.52.8—3.O1.62—1.67无色,淡浅绿或浅黄,淡粉红尢贝壳状透明到不透明象玻璃在短波紫外线的激发中,有时呈蓝色CaM gSi 206单斜晶系5.5—6.53.22—3.381.66一1.72无色,白,灰,淡绿,棕黄到棕红.鲜绿,…     

厂所结合的道路越走越宽广

一九七一年初,我们开始承担金刚石的科研工作。在毛主席革命科研路线的指引下,进一步批判了“三脱离”的修正主义科研路线,走出研究所,与工人相结合,坚持了科研、生产、使用三结合的方针,不仅突破了金刚石成长中的某些难关,而且在思想政治路线方面也受到很深刻的教育。我们体会到:厂所结合,成立工人、科技人员、干部组成的三结合科研小组,有利于知识分子接受工人阶级的再教育,有利于发挥工人阶级在科研工作中的领     

Artificial ground motion compatible with specified peak velocity and target spectrum

In this paper, a method, which synthesizes the artificial ground motion compatible with the specified peak velocity as well as the target acceleration response spectrum, was proposed. In this method, firstly, an initial acceleration time history α8^（0） （t）, which satisfies the prescribed peak ground acceleration, the target spectral acceleration ST（ω, ζ）,and the specified intensity envelope, is generated by the traditional method that generates the requency domain; secondly,α8^（0） （t）is further modulated by superimposing narrow-band time histories upon it in the time domain to make its peak velocity, approach the target peak ground velocity, and at the same time to improve its fitting precision to the target spectrum. Numerical examples show that this algorithm boasts high calculation precisions.     

Study of Aerodynamic Parameters on Different Underling Surfaces

Aerodynamic parameters including the zero-plane displacement (d), roughness length (20), and friction velocity (u*) on the different underlying surfaces of heavy-grazing site, medium-grazing site, light-grazing site, no-grazing site, dune, inter-dune, grassland, rice paddy site, wheat site, soybean site, and maize site have been computed based on the Monin-Obukhov similarity theory by utilizing the micrometeorologically observed data of dune and vegetation in the semi-arid area at Naiman, Inner Mongolia of China, conducted jointly by the Institute of Desert Research, Chinese Academy of Sciences and the National Institute of Agro-Environmental Sciences of Japan in 1990-1994. And their relationships between wind speed and Richardson number are analyzed. The aerodynamic characteristics of different man-made disturbed grassland ecosystems are also compared. Result shows that the vegetation coverage and the above-ground biomass decrease with the increase in man-made stress of the grassland. The roughness length for different underlying surfaces is closely related to vegetation height, above-ground biomass, and ground surface undulation, and Richardson number Ri is also its influencing factor. The friction velocity varies largely on different underlying surfaces, and it is positively proportional to wind speed and roughness length. The aerodynamic parameters of various times on the same underlying surface are different, too. Above results indicate that grassland and vegetation are of significance in preventing desertification, especially in the arid and semi-arid land ecosystems. And the results of this paper are also important for constructing the land surface physical process as well as regional climate model.     

同时满足多个阻尼反应谱的人造地震动时程合成

应用Ｍ．Ｈｉｒａｓａｗａ和Ｍ．Ｗａｔａｂｅ（１９９２）提出的方法,进行了相应的数学推导：即以满足某个阻尼比的反应谱的人造地震动作为初始时程,采用奇异值分解法,通过解线性方程组求出校正时程,并多次叠以逐步辐近