Zirconia-yttria oxide nano powder was prepared for ceramic dental industry Yttria (Y2O3). Magnesia oxide (MgO) nano powders were added to zirconia in different ratios to determine the best ratio as a stabilizer for zirconia. Alumina was added to (zirconia-yttria) system in different ratios. Dry pressure -dry pressing was used to prepare the specimens at a pressure of (2.5) tons, sintering at 1570oC. The physical tests were studied (apparent porosity, result in apparent porosity (0.05%), apparent density, result (6 gm/cm3), and X-ray diffraction analysis were studying phases in the system. X-ray diffraction results showed that adding (Y2O3) at 3% is the best, as it obtained the highest percentage of tetragonal zirconia