搜全网
搜本展位
仪信通白金会员 第 13 年
仪信通诚信认证
仪器信息网认证,请放心拨打
400-860-5168转0677
名 称: 麦克默瑞提克(上海)仪器有限公司
认 证: 工商信息已核实
信用积分:3419
厂商反馈速度 21-24 小时
美国麦克仪器公司手机版
文档下载

颗粒测量的现代方法

发布时间:2009/07/04 11:47 下载:191 次 免费下载
FINE PARTICLE TECHNOLOGY Since prehistory man has been aware of the importance of particle size in producing resources and wares with desired properties. Archeological evidence indicates that paints used for cave wall paintings are mixtures of finely pulverized pigmenting materials, predominantly carbon, ochre and hematite. Man came to realize that adding pulverized materials to clay not only improved its workability, but improved the drying process, reduced shrinkage and changed the characteristics of the resulting vessels. There also is evidence of using particles of certain sizes to control porosity. For many centuries, finely divided, calcined lime powder or gypsum mixed with sand was used in plasters and binders. Then, about 2000 years ago, the Romans improved upon the formula by adding volcanic (pozzolanic) ash, which produced a superior hydraulic cement that was used in building many structures that still stand
其它资料
如何进行平衡检测? 假设系统已经采集了一个点,并且已经准备好进行下一个目标压力和吸 附量的测定。先在歧管内注入一定量的气体,预计能够使系统压力达到目标压力
发布时间:2016-06-02  浏览量:124 次 下载次数:9
样品管的自由空间(freespace)也称为死体积(deadspace),是指样品管内未被样品占据的空间。在物理吸附测试过程中,样品管会部分浸入在低温冷浴中,自由空间就分为了两
发布时间:2016-03-29  浏览量:144 次 下载次数:14
A:在常温下,隔离阀关闭,往歧管内注入一定量的气体。 B:在常温下,打开隔离阀,使气体进入样品管,测试并计算热自由空间。 C:使样品管浸入冷浴中,测试并计算冷自由空
发布时间:2016-04-29  浏览量:139 次 下载次数:14
仪器信息网 http://www.instrument.com.cn/ 设计制作