Announcement for Downloading full text filePlease respect the Copyright Act.
All digital full text dissertation and theses from this website are authorized the copyright owners. These copyrighted full-text dissertation and theses can be only used for academic, research and non-commercial purposes. Users of this website can search, read, and print for personal usage. In respect of the Copyright Act of the Republic of China, please do not reproduce, distribute, change, or edit the content of these dissertations and theses without any permission. Please do not create any work based upon a pre-existing work by reproduction, Adaptation, Distribution or other means.
URN etd-0709104-011933 Statistics This thesis had been viewed 3748 times. Download 2907 times. Author Hung-Chuan Mai Author's Email Address email@example.com Department Materials Engineering Year 2003 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 58 Title Middle IR Transmitting Calcium Aluminate Glass-Ceramics Keyword glass-ceramics Calcium aluminate glass Calcium aluminate glass glass-ceramics Abstract Calcium aluminate glass has good optical transmission in the middle infrared (3~5μm) range. In this study, the glasses were prepared from reagent-gade chemicals Mg(OH)2, CaCO3, BaCO3 ,Al2O3, and 9wt% ZrO2 which acts as nucleating agent, by quenching method. The glass-ceramics, which are transmitting in the middle IR region and have improved mechanical strength, were made from the parent glass via suitable crystallization heat-treatment. The major crystalline phase, Ca3Al2O6 (petaline), uniformly nucleated and crystallized in the glass matrix. When the crystallization temp./time increased, BaAl2O4 nucleated from the sample surface and grew along the residual glass, forming a surface layer.
The glass-ceramics exhibit slightly decreased but acceptable transmissivity in the middle IR region and improved mechanical strength.
Advisor Committee Jiin-Jyh Shyu - advisor
Jenn-Ming Wu - co-chair
Y.J. Lin - co-chair
Files Date of Defense 2004-06-02 Date of Submission 2004-07-09