The Synthesis and Characterization of Yttrium Aluminum Garnet Phosphors Prepared with Different Aluminum Sources

• Main Authors: Chian-You Huang, 黃乾祐
• Other Authors: Yung-Fu Hsu 徐永富
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/kcu7c2

碩士 === 國立臺北科技大學 === 材料及資源工程系所 === 94 === Ce3+-doped yttrium aluminum garnet (YAG:Ce) phosphor was synthesized by three different precipitation processes, in which aluminum nitrate, alumina (α and θ phase) or boehmite was used as the aluminum sorce. Pure YAG:Ce phosphor can be obtained from aluminum nitrate by normal strike and reverse strike precipitation method and calcined at 900℃ for 2h, which is shorter than that of fast titration method calcined at 900℃ for 4h. When alumina (α and θ phase) or boehmite was used as the aluminum sorce. YAG phosphor can synthesized using θ-phase alumina by reverse strike precipitation and calcined at 1300℃/16h-1400/24h, which was 100℃ lower than that of used α-phase alumina. The spectra shows that YAG phosphors emitted at 524 and 527 nm, which was in the wavelength range of yellow to green light.