PREPARATION OF UNIQUE COLORED GLASSES LIKE A BLUEBROWN DICHROIC GLASS BY COLLOIDAL GOLD AND THE OPTICAL

用胶体金和光学制备独特的有色玻璃，如蓝棕色二向色玻璃

• 批准号: 09555280
• 负责人: KOKUBU Toshinori
• 金额: $ 6.78万
• 依托单位: MIYAKONOJO NATIONAL COLLEGE 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: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09555280/
• 关键词: dichroic glass; blue-brown dichroism; color by colloidal gold; opal glass and red light transmit; calculation by Mie theory; problems in mass melting; effect of reducing agents; scattring and absorption; ガラス、金コロイド; 減衰スペクトル、茶-青2色性; ガラスの分相、金の粒子径 /

Blue-brown dichroic glass by colloidal gold which displays deep blue transmitted color and brown surface color was prepared in the glass system of 52.5 Si0_2-13.3 A1_20_3-17.4 B_20_3-10.2 CaO-2.0 MgO-4.6 Li_2O (mol%) adding 0.022 wt% of gold without reducing agents. The blue-brown dichroic glass contained octahedral crystals of gold size of about 50-60 nm in radius. The dichroic glass exhibited a lower extinction in blue light region and a stronger scattering in red light region of visible light, than those in the calculated spectra by Mie theory. The calculated true absorption spectra had no peak as the size of particles became larger beyond 45 rim in radius. It was concluded, therefore, that the blue-brown dichroism was originating from scattering itself by gold particles, shaped in octahedron and aggregated into cluster. A white opaline glass which transmits the red light in visible light region could be prepared from the composition of 55.0 SiO_2-7.0 A1_20_3-17.5 B_20_3-10.5 CaCO_3-2.0 MgO-0.7 BaCO_3-0.5 NaBF_4-4.2 Na_2CO_3-2.6 K_2C0_3 (mol%) adding 0.002 wt% of gold and 0.2 wt% of Sn. In this glass, the wavelength below 550 nm in visible light region was strongly scattered out and red light was passing through.

在52.5SiO_2 - 13.3Al_2O_3 - 17.4B_2O_3 - 10.2CaO-2.0MgO-4.6Li_2O（mol%）系统中，添加0.022wt%的金，在不添加还原剂的情况下，制得了透射色为深蓝色、表面色为棕色的蓝棕色胶体金二向色玻璃。蓝棕色二向色玻璃含有半径为约50-60 nm的金尺寸的八面体晶体。与Mie理论计算的光谱相比，该二向色性玻璃在可见光的蓝光区具有较低的消光比，在红光区具有较强的散射。计算得到的真实吸收光谱随着粒径的增大而消失。因此，蓝棕色二向色性是由八面体金颗粒聚集成团的散射引起的。在55.0SiO_2 - 7.0Al_2O_3 - 17.5B_2O_3 - 10.5CaCO_3 - 2.0MgO-0.7BaCO_3 - 0.5NaBF_4 - 4.2Na_2CO_3 - 2.6K_2CO_3（摩尔%）的组成中加入0.002wt%的金和0.2wt%的Sn，可制得在可见光区透过红光的白色乳白玻璃。在这种玻璃中，可见光区域中低于550 nm的波长被强烈散射出去，红光通过。

项目成果

TOSHINORI KOKUBU MASAYUKI YAMAE MATTHEW DENESUK DONALDR UHLMANN: "Preparation of Blue-brown Dichroic Glass with Colloidal Goid in the System of SiO_2-Al_2O_3-B_2O_3-CaO-MgO-Li_2Ole and the Origin of the Dichroism" Journal of Non-crystaine solid In apply.

TOSHINORI KOKUBU MASAYUKI YAMAE MATTHEW DENESUK DONALDR UHLMANN：“在 SiO_2-Al_2O_3-B_2O_3-CaO-MgO-Li_2Ole 体系中用胶体 Goid 制备蓝棕色二向色性玻璃及其二向色性的起源” 非晶固体杂志