氧化钇稳定立方氧化锆掺杂晶体的吸收光谱和发光光谱

用“壳熔”冷坩埚技术生长了氧化钇稳定的立方氧化锆(YSCZ)掺杂晶体,它们的杂质浓度为 CeO_2(0.01、0.3、0.5wt%)、Fe_2O_3(?)0.03wt%+CeO_2 0.01wt%、Fe_2O_3 0.03wt%+(?)CeO_2 0.03wt%、CoO(0.1、0.3wt%)、Cr_2O_3 1wt%,一个为未掺杂的 YSCZ 晶体。在 Beckman UV 5270型光谱仪上测量了室温下300～800nm 波长范围的吸收光谱,记录了空气中生长和~(60)Co 射线辐照后晶体的吸收光谱。实验结果表明掺 Ce 和 Co 晶体出现新带,这是由于 γ 射线辐照过程中 Ce~(4+)变为 Ce~(3+)、Co~(3+)变为 Co~(2+)的原因。但掺Cr 的晶体经辐照后无新带出现。本工作还测量和讨论了掺 Cr、Er 等晶体的发光光谱。

Absorption and Luminescence Spectra of Yttria Stabilized Cubic Zirconia Crystals with Dopants

Cubic zirconia crystals stabilized by yttria with or without dopants were obtai-ned by skull-melting technique.The different dopant compositions were CeO_2 (0.01,0.3 and 0.5 wt%),Fe_2O_3 0.03 wt%+CeO_2 0.01 wt%,Fe_2O_3 0.03 wt%+CeO_20.03 wt%,CoO (0.1 and 0.3 wt%),Cr_2O_3 1wt% respectively.The optical ab-sorption spectra of these crystals in the range of 300-800 nm were measured with aBeckman modle UV 5270 spectrometer at room temperature.The absorption spectraof the crystals grown in air,or further irradiated by ~(60)Co -ray,were recorded.Theexperimental results show that new absorption spectrum bands will appear for suchcrystals doped with Ce or Co,because of Ce~(4+) changing into Ce~(3+),or Co~(3+) intoCo~(2+) during irradiation.For those crystals doped with Cr,there will not appear anynew absorption spectrum bands after irradiation.The luminescence spectra of the crystals doped with Cr or Er,etc.were alsomeasured and discussed.