Design and Characterization of New Optical Functional Transparent Tellurite Glass-Ceramics

新型光学功能透明碲酸盐微晶玻璃的设计与表征

• 批准号: 08455300
• 负责人: KOMATSU Takayuki
• 金额: $ 4.54万
• 依托单位: Nagaoka University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455300/
• 关键词: Glass-ceramics; Tellurite-based glasses; Nonlinear optical glasses; Second harmonic generation; Metastable crystalline phase

The purpose of the present study is to clarify the mechanism of the second harmoinic generation (SHG) in transparent tellurite-based glass-ceramics which have been discovered by the present author's group. The following results were obtained. 1) The chemical composition of the crystalline phase showing SHG in 15K_2O-15Nb_2O_5-70TeO_2 glass-ceramics corresponds to K (Nb_<1/3>Te_<2/3>) _2O_<4.8> approximately, and its crystal structure is oxygen-defect fluorite type. This crystal is distorted slightly from cubic, maybe causing SHG.2) The lattice constant of the crystalline phase in xNa_2O- (15-x) K_2O-15Nb_2O_5-70TeO_2 glass-ceramics decreases linearly with increasing Na_2O content, meaning the appearance of the solid solution between Na^+and K^+. The intensity of SHG decreases steeply with increasing Na_2O/K_2O ratio, and the glass-ceramic with x=8 shows no SHG.3) The thermal stability against crystallaization in 15K_2O-xRO- (15-x) Nb_2O_5-70TeO_2, RO=WO_3, MoO_3, is extremely high, and the formation of the crystalline phase showing SHG tend to be difficult. 4) The surface crystallization layr generates strong second harmonic generation compared with the interior of the glass-ceramics. 5) The transparent Er^<3+>-doped tellurite-based glass-ceramics have been fabricated, and the upconversion at 550nm due to ^4S_<3/2>*^4I_<15/2> transition under the irradiation of laser with 800nm wavelength is clearly observed. 6) It is found from heat capacity changes at the glass transition that rearrangements among structural units occurs easily in tellurite-based glasses.

本研究的目的是阐明作者所在小组发现的碲酸盐基透明微晶玻璃中二次谐波产生（SHG）的机理。获得了以下结果。1)15K_2O-15Nb_2O_5-70TeO_2微晶玻璃中出现二次谐波的晶相的化学成分近似对应于K（Nb_（1/3）Te_（2/3））_2O_2<4.8>，其晶体结构为氧缺陷萤石型。2）xNa_2O-（15-x）K_2O-15Nb_2O_5-70TeO_2微晶玻璃的晶格常数随Na_2O含量的增加而线性减小，即Na^+和K^+之间形成固溶体。3）15 K_2 O-xRO-（15-x）Nb_2O_5-70TeO_2（RO=WO_3，MoO_3）微晶玻璃具有很高的抗晶化热稳定性，且不易形成具有二次谐波的晶相。4)与微晶玻璃内部相比，表面晶化层产生较强的二次谐波。5)制备了掺Er^&lt;3+&gt;碲酸盐基透明微晶玻璃，在800 nm激光辐照下，观察到了550 nm处的上转换发光。6)从玻璃转变时的热容变化发现碲酸盐基玻璃容易发生结构单元间的重排。

项目成果

T.Komatsu, T.Noguchi, Y.Benino: "Heat Capacity Changes and Structural Relaxation at Glass Transition in Mixed-Alkali Tellurite Glasses" Journal of Non-Crystalline Solids. Vol.222. 206-211 (1997)

T.Komatsu、T.Noguchi、Y.Benino：“混合碱碲酸盐玻璃中玻璃化转变时的热容量变化和结构弛豫”非晶固体杂志。

Takayuki Komatsu: "Thermal stability and optical properties of K2O-Nb2O5-TeO2 glasses" Physics and Chemistry of Glasses. 38巻. 188-192 (1997)

Takayuki Komatsu：“K2O-Nb2O5-TeO2 玻璃的热稳定性和光学性能”《玻璃物理与化学》卷 38. 188-192 (1997)。

Takayuki Komatsu: "New transparent nonlinear optical tellurite-based glass-ceramics" Inorganic Materials. 33巻・10号. 1069-1074 (1997)

Takayuki Komatsu：“新型透明非线性光学碲酸盐基玻璃陶瓷”无机材料第 33 卷，第 10 期。1069-1074 (1997)。

T.Komatsu, H.G.Kim, H.Oishi: "New Transparent Non-Linear Optical Tellurite-Based Glass-Ceramics" Inorganic Materials. Vol.33. 1069-1074 (1997)

T.Komatsu、H.G.Kim、H.Oishi：“新型透明非线性光学碲酸盐基玻璃陶瓷”无机材料。

Takayuki Komatsu: "Heat capacity changes and structural relaxation at glass transition in mixed-alkali tellurite glasses" Journal of Non-Crystalline Solids. 222巻. 206-211 (1997)

Takayuki Komatsu：“混合碱亚碲酸盐玻璃中的热容量变化和结构松弛”《非晶固体杂志》222. 206-211 (1997)。