The physical properties of the Li 2O Al 2O 3 SiO 2 system based zero expansion glass ceramic of V02 have been measured during a linearly temperature raise. There is a significant change in a narrow temperature range for all physical properties caused by the phase transformation. The refractive index increases from 1.5258 to 1.5433. The density increases from 2.563 to 2.576 g/cm 3. The expansion coefficient decrease from 41.5×10 -7 /℃ to near zero. The Knoop hardness increases from 57.8 MPa to 76.4 MPa. The total linear shrinkage is 1.12%. The optical transmission at short wavelength region decreases first and then increases with heat treatment temperature raise. Some useful points were suggested for controlled crystallization of large glass mirror blank.