一、前言通常烧结体中残存着许多气孔,有独立存在于内部并不和外部联通的闭孔,也有借粒子间细小间隙相互联通并直通外部的开孔。开孔的容积百分比称为有效孔隙度。开孔和闭孔的总和对烧结体体积的容积百分比称为孔隙度。孔隙度(P)和烧结密度(D)的关系如下: I. Preface In general, many pores exist in the sintered body. There are closed cells that exist independently in the interior and do not communicate with the outside. They also have open pores that communicate with each other through small gaps between the particles. The percentage of open pores is called effective porosity. The volume percentage of the sum of open and closed cells to the volume of the sintered body is called porosity. The relationship between porosity (P) and sintering density (D) is as follows: