Helium Pynometer for measuring true density of powdered porous materials

此应用是用于测量粉末样品的真实密度的氦气浓度计。达恩实验室由大约30名研究人员组成，其中大多数人正在用各种方法制作粉末样品。其中三种方法，高能球磨，机械磨损和滚磨是机械化学合成的例子，其中非晶或纳米结构的合金或化合物在室温下通过反复强烈的机械接触生产。非晶或纳米结构材料也可以通过快速凝固和共溅射生产。粉状非晶或纳米结构材料的密度只能用He浓度计方便地测量。非晶和纳米结构材料的密度提供了对其原子包装的重要见解。此外，密度实际上很重要，因为能够将尽可能多的电池电极材料装入电池罐中以最大化体积能量密度是至关重要的。

This application is for a helium pycnometer to measure the true density of powder samples. The Dahn lab comprises about 30 researchers, most of whom are making powdered samples by a variety of methods. Three of the methods, high energy ball milling, mechanical attriting and roller milling are examples of mechanochemical synthesis, where amorphous or nanostructured alloys or compounds are produced at room temperature by repeated intense mechanical contacts. Amorphous or nanostructured materials are also produced by rapid solidification and co-sputttering. The density of powdered amorphous or nanostructured materials can only be measured conveniently using a He pycnometer. The density of amorphous and nanostructured materials gives important insights into their atomic packing. In addition, the density is pratically important because it is critical to be able to pack as much battery electrode material as possible into battery cans in order to maximize volumetric energy density.