Abstract: <SPAN lang=EN-US>Physical properties of industrial </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times mso-hansi-font-family: Roman?; Times>ρ</SPAN><SPAN lang=EN-US>-</SPAN><SPAN lang=EN-US>alumina were studied.Production technologies and several uses of </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times mso-hansi-font-family: Roman?; Times>ρ</SPAN><SPAN lang=EN-US>-alumina were briefly introduced.Crystal phase of </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times mso-hansi-font-family: Roman?; Times>ρ</SPAN><SPAN lang=EN-US>-alumina was determinated by X-ray diffraction;content of </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times mso-hansi-font-family: Roman?; Times>α</SPAN><SPAN lang=EN-US>-gibbsite was measured by thermal analysis (including TG-DTA);morphology and size of </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times mso-hansi-font-family: Roman?; Times>ρ</SPAN><SPAN lang=EN-US>-alumina particles was determined by scanning election microscopy.At last,pore volume,specific surface area and pore size distribution of </SPAN><SPAN style="FONT-FAMILY: 宋体; mso-ascii-font-family: " Roman?? New ?Times mso-hansi-font-family: Roman?; Times>ρ</SPAN><SPAN lang=EN-US>-alumina were determined by nitrogen adsorbtion method,respectively.<BR></SPAN>