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URN etd-0705104-171807 Statistics This thesis had been viewed 3254 times. Download 1879 times. Author Chen-Tsai Huang Author's Email Address firstname.lastname@example.org Department Materials Engineering Year 2003 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 76 Title Crystallization and Optical Properties
of Cr3+-doped Mullite Glass-Ceramics
Keyword Transparent mullite glass-ceramics glass-ceramics mullite Transparent Abstract Mullite glass-ceramics doped Cr3+ to be possible to apply to being possible to adjust the laser and the solar concentrators. This study is SiO2-Al2O3-B2O3-ZnO-K2O in the fixed parent glass the ingredient, doped different content of the Cr2O3, after the suitable heat treatment, produces nano- size mullite crystallization pellet in the glass. Cr produces matter of the Luminescence, but Cr also possibly affects the nucleation and the crystal behavior, then influence microstructure and properties. Therefore changes content of the Cr2O3, discusses whether can further promote the properties.
When DTA analysis, along with Cr2O3 by 0 increase to 0.5, Tp can reduce advances again, but when 0.25, Tp has the minimum value. In the XRD analysis, the increase content of the Cr2O3, second the stages heat treatments after nucleation - growth, forms the glass-ceramics, the main crystallization phase is the mullite. In the UV- visible and the infrared transmission analysis, is worthy of looking at increases Cr2O3 the glass -ceramics to have the absorption phenomenon in the visible, but not obviously absorbs in the near-infrared. In the Photoluminescence analysis, increases 0.1 Cr2O3 the mullite glass ceramics, increases along with nucleation temperature and the nucleation time, the crystal size changes small and the crystallized amount increases. Then increases along with crystallization temperature and crystallized amount, the emission intensity is bigger.
Advisor Committee Jiin-Jyh Shyu - advisor
Jenn-Ming Wu - co-chair
Yung-Jen Lin - co-chair
Files Date of Defense 2004-06-02 Date of Submission 2004-07-05