| 摘要 |
PURPOSE:To obtain the titled large-sized single crystal of mm size in high reproducibility, by pressurizing and heating raw material BN and a specific solvent substance in the presence of cubic BN seed crystal. CONSTITUTION:An alkaline (earth) metal borate is blended with 1-10wt% Li3N and/or Li3BN2 and 5-30wt% one more selected from Sr3N2, Ba3N2, Sr3B2N4 and Ba3B2O4 to give a solvent substance. Then raw material BN and the solvent substance are heated and pressurized in the presence of cubic BN seed crystal under stable temperature and temperature conditions at >=the melting point of the solvent substance. |
