Laser–host ceramics are a new class of materials and have proved to be a good alternative to the single-crystals. They can be produced in large size with higher concentration of activator ions having more homogeneity which is difficult to achieve with the conventional single-crystal growth technology. Ytterbium (Yb)-doped yttrium aluminium garnet (YAG) is a very attractive laser–host material because of its broad emission band, low quantum defect, no excited state absorption or up-conversion loss and wide range of tunability. In the present work, 10 atm% Yb-doped YAG transparent ceramic was fabricated using nano-powder technology and vacuum sintering. Single-phase nano-powders of Yb:YAG were synthesized by a co-precipitation method and thereafter sintered under vacuum at 1750∘C\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$1750^{\circ }\hbox {C}$$\end{document} for 5 h. The as-sintered ceramic samples are of dark greenish colour which is attributed to the reduction of Yb3+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Yb}^{3+}$$\end{document} to Yb2+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Yb}^{2+}$$\end{document} during vacuum sintering. However, after annealing in air at 1350∘C\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$1350^{\circ }\hbox {C}$$\end{document} for 8 h they retain their natural colour attributed to the transformations from Yb2+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Yb}^{2+}$$\end{document} to Yb3+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Yb}^{3+}$$\end{document}. The transmission spectra of the as-sintered polished ceramics show the presence of broad absorption bands near 250, 380, 480 and 630 nm due to the electronic transitions in the Yb2+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Yb}^{2+}$$\end{document} ion. These bands disappear after annealing in air. The well-established bands due to transitions in Yb3+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Yb}^{3+}$$\end{document} were observed between 900 and 1000 nm.

中文翻译：

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真空烧结掺镱YAG陶瓷的研究：激光-主体材料

激光主体陶瓷是一类新型材料，已被证明是单晶的良好替代品。它们可以大尺寸生产，具有更高浓度的活化剂离子，具有更高的均匀性，这是传统单晶生长技术难以实现的。掺镱 (Yb) 钇铝石榴石 (YAG) 是一种非常有吸引力的激光主体材料，因为它具有宽发射带、低量子缺陷、无激发态吸收或上转换损失以及广泛的可调性。在目前的工作中，使用纳米粉末技术和真空烧结制造了 10 atm% Yb 掺杂的 YAG 透明陶瓷。Yb单相纳米粉体：烧结后的陶瓷样品呈深绿色，这归因于 Yb3+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{ amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Yb}^{3+}$$\end{document} 到 Yb2+\documentclass [12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt } \begin{document}$$\hbox {Yb}^{2+}$$\end{document} 在真空烧结过程中。然而，\setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Yb}^{3+}$$\end{document}。由于 Yb2+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{ 中的电子跃迁，烧结后抛光陶瓷的透射光谱显示在 250、380、480 和 630 nm 附近存在宽吸收带wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\hbox {Yb}^ {2+}$$\end{document} 离子。这些带在空气中退火后消失。