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URN etd-0802105-194317 Statistics This thesis had been viewed 2429 times. Download 1295 times. Author Wang-Ching Liu Author's Email Address No Public. Department Materials Engineering Year 2004 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 55 Title Effect of SnO Addition on the Preparation and Properties of Middle-IR Transmitting Calcium Aluminate Glasses Keyword SnO Calcium Aluminate Glasses Middle-IR Middle-IR Calcium Aluminate Glasses SnO Abstract The objective of the research is to study the influence of the addition of SnO on the of preparation and properties CaO-Al2O3-MgO-BaO glass.
The SnO-free SnO glass melted in covered alumina crucible became fully crystallized because of obvious reaction between glass liquid and crucible. After adding SnO, the extent of reaction with crucible was reduced with the increase in SnO content, and the ability of glass formation was improved. This result is caused by material delaminateion during glass meting. The middle is liquid oxide glass. There is liquid metal Sn which produce sediments at crucible bottom. A layer of SnO2-containing film also formed at the surface of liquid glass. The amount of liquid metal Sn increased with the increase in SnO content. Beacause the sedimentation of liquid Sn at the crucible bottom, the corrosion of crucible with the liquid glass was inhibited. Therefore, the incorporation of Al2O3 from crucible to glass can be reduced, improving the ability glass of formation.
Comparing with the SnO-free glass, the chemical durability and hardness of the glass containing 20 mole% of SnO can be substantially improved, and the viscosity was also increased. The transparency in the visibile region for the glasses cantaining SnO was improved substantially with respect to the glass without SnO. The absorption at around 3μm of near-mid-IR caused by OH‾ group became weaken.
Advisor Committee Jiin-Jyh Shyu - advisor
Jyh-Wei Lee - co-chair
Ping-Yu Shih - co-chair
Files Date of Defense 2005-06-30 Date of Submission 2005-08-02