Front pages with contents of No. 55, 1995

Cover. Information for Supporters of the Charles Darwin Foundation. Contents.

Front pages with contents of No. 54 and 55, 1995, Spanish version

Cover. Contents.

Front pages with contents of No. 56, 1996

Cover. Contents.

Front pages with contents of No. 57, 1996

Front cover. Contents.

TeO<sub>2sub>-Nb<sub>2sub>O<sub>5sub>-YF<sub>3sub>玻璃系统的形成区及性质研究

制备了一种新型的氧卤碲酸盐玻璃：TeO2-Nb2O5-YF3,给出并研究了TeO2-Nb2O5-YF3三元系统的玻璃形成范围。测试了玻璃的密度、折射率、差热(DTA)、拉曼光谱、红外透射光谱以及紫外吸收光谱,通过光谱分析研究了组分含量的变化对玻璃结构及红外透射特性的影响。实验结果表明,TeO2-Nb2O5-YF3玻璃系统具有优良的成玻璃性能和热稳定性等特性,而且在2.8～3.3 μm区域内无明显的[OH]基团吸收,在中红外3～5 μm区域具有优良透射性能,因此在中红外透射方面具有潜在应用价值。

Front pages with contents of No. 56 and 57, 1997, Spanish version

Front cover. Contents.

Front pages with contents of No. 58, 1997

Front cover. Contents.

Front pages with contents of No. 59, 1998

Front cover. Table of Contents.

Yb掺杂的YAlO<3/sub>单晶体的温梯法生长和光谱性能

The dark-brown colored 5 at% Yb-doped YAlO3 (Yb:YAP) single crystal was grown successfully by temperature gradient technique (TGT) for the first time. The TGT-grown Yb:YAP crystal with the perovskite structure and excellent crystallization perfection were confirmed by the X-ray diffractions techniques. The dark-brown color of TGT-Yb:YAP crystal turned into the colorless after annealing in the air at 1200 degrees C for 10h. The absorption spectra, LD-excited infrared emission and X-ray excited luminescence spectra of the air-annealed Yb:YAP single crystal were investigated at the room temperature. The results indicate that the TGT-Yb:YAP single crystals can be used for the laser and scintillation applications. (c) 2005 Elsevier B.V. All rights reserved.

Front pages with contents of No. 60, 1999

Front cover. Table of Contents.

Front pages with contents of No. 61, 2000

Front cover. Table of Contents.