真空热还原制锂工艺的技术经济分析

系统介绍了以碳酸锂为原料 ,加入石灰或铝氧土后 ,经焙烧、硅铁或铝粉真空热还原制取金属锂的工艺。本法与氯化锂熔体电解制取锂的工艺相比 ,具有产品成本低、纯度高、环境状况好的优点。     

真空断路器开断电抗器操作产生过电压问题浅析

本文对真空断路器开断电抗器时其操作电压产生过电压问题进行了分析，主要分析其产生过压电压的原因及抑制措施。     

Bioeffects of Low Energy Ion-Beam Implantation and Vacuum Treatment on M1 Arabidopsis Thaliana

Vacuum treatment and ion-beam bombardment are two major processes in the low energy ion-beam implantation. To accurately study the contributions of these two major factors to the bioeffects separately, the M1 generation variation of Arabidopsis thaliana with ion-beam implantation and vacuum treatment were compared through a series of key plant development parameters including morphological observation, biochemical assay and RAPD （random amplified polymorphic DNA） analysis. The results showed that ion-beam implantation had obvious effect on almost all of these parameters, and the vacuum treatment had some impacts on several morphological parameters such as the bolting time and the length of the primary stem. Taking the results together, the indication is that vacuum treatment has some slight contributions to the bioeffects of ion-beam implantation while ion-beam bombardment itself is the major creator of the bioeffects.     

微波管生产工艺中的无油检漏技术

阐述了微波管生产工艺中真空封泥油污染的危害性,并简要介绍了无油检漏夹具的设计.     

第十三讲:真空系统的检测技术

1 真空测量仪表与规管的选用和安装 1.1 真空仪表的选用 从原则上来说,应根据实际情况,从以下几个方面考虑选用适用的真空测量仪表.     

氟化物的水热合成及其VUV发光性能

以中温水热法合成了NH4Y3F10，YF3，LiYF4等晶体氟化物及其荧光粉NH3Y3F10：Eu^3 LiYF4:Tb^3 ，并讨论了水热合成条件。用X-ray粉末衍射确定了物象，并用PowderX计算机软件进行了指标化，确定了晶格参数。还测定了NH4Y3F10：Eu^3 和LiYF4：Tb^3 荧光粉的VUV或UV光激发的激发光谱和发射光谱。     

国内著名真空专家龚求初先生逝世

国内著名真空专家龚求初先生于2007年3月4日逝世，享年86岁。     

改进型气动高真空蝶阀的应用

本文介绍了改进型气动高真空蝶阀的优点、结构及应用。