论文部分内容阅读
测定固体比表面的方法很多,应用最广的是对气体或蒸气的吸附方法。而吸附法又可分为两种:静态吸附法和动态吸附法。静态吸附法是在低温(液体氮的温度)、高真空(10~(-4)—10~(-5)毫米汞柱)条件下吸附气体的方法,这个方法在目前是测量比表面较准确的方法之一,但因设备和技术上的困难在国内尚未获得广泛的应用;动态吸附法是在常温常压流动体系下测量吸附剂对气体的吸附重量法,此法设备较简单
Many ways to determine the specific surface of the solid, the most widely used is the gas or vapor adsorption method. The adsorption method can be divided into two kinds: static adsorption method and dynamic adsorption method. The static adsorption method is a method of adsorbing gas under conditions of low temperature (liquid nitrogen temperature) and high vacuum (10 -4 - 10 -5 mmHg). This method is currently more accurate in measuring specific surface area However, due to equipment and technical difficulties in the country has not yet been widely used; dynamic adsorption method is measured at room temperature and pressure flow system adsorption of gas adsorbent gravimetric method, this method is relatively simple equipment