Method for producing ultra high purity optical quality glass products

Process for producing ultra high purity optical quality glass products is disclosed, the method comprising 1. Step of the granules having a about 1 millimeter smaller average particle size and densify the metal oxide or metalloid oxide; 2. Optionally, completely by sintering the granules, processes for producing high purity artificial sand; 3. The granular artificial sand conventional techniques, for example by casting by slip casting, the step of creating a high-density porous molded body; 4. Optionally, drying and partially sintering the green body; 5. Optionally, a step of fully sintered under vacuum said molded body; and 6. Optionally, comprising the step of hot isostatic pressing the fully sintered green body of said, At that time, the metal oxide or metalloid oxide has a BET surface area 30~90m