METHOD FOR DEVELOPING COLORS OF JEWEL BY ION IMPLANTATION AND THERMAL TREATMENT

摘要

PURPOSE: A method for developing colors of jewel and single crystal is provided to express various colors without defects in crystal by using thermal treatment in addition to conventional ion implantation. CONSTITUTION: The method comprises the steps of: polishing natural or synthetic jewels such as diamond, sapphire, quartz, etc; setting a jewel in ion implantation equipment; implanting non metal or metal ions into the jewel with 20-180KeV of voltage and 1x10¬15-1x10¬18ions/cm¬2 of the amount of ions; thermal treating ion-implanted jewel in a furnace by raising temperature between 200 and 1800deg.C at a rate of 0.1-0.5deg.C/min, holding it for 3-5hrs and cooling it to room temperature at a rate of 0.1-0.5deg.C/min in inert gas atmosphere(Ar, N2) to increase the depth of ion implantation and recover surface defects of the jewel so as to develop colors or in air or O2 atmosphere to discharge implanted ions or form oxides so as to remove colors; immersing the jewel in liquid such as acetone and acids to remove impurities left in the jewel; and re-polishing to polish and recover surface defects with the powder of diamond, Cs, Al2O3, etc.