Patent ID: 7527690
Filing Date: 2009-05-05
Classification: C01G,C01P,C30B,H01G,H01L

Abstract:
1. A process of preparing a single crystal, comprising: a first step of mixing 0.09 to 0.20 mol, 0.09 to 0.20 mol and 0.01 to 0.27 mol of magnesium oxide (MgO) or zinc oxide (ZnO), niobium oxide (Nb a second step of adding additives to facilitate a reaction of the mixture obtained in the first step or control the properties of the mixture and causing the resultant mixture to react at a high temperature; a third step of mixing the compound obtained in the second step with one selected from lead oxides having a formula of Pb a fourth step of melting the powder obtained in the third step under high temperature and pressure and slowly cooling the melt to be crystallized.