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研究生:李原吉
研究生(外文):Lee yuan gie
論文名稱:離子交換法製備折射率梯度玻璃
論文名稱(外文):The Fabrication of GRIN Glass by Ion-Exchange
指導教授:蔡大翔
指導教授(外文):Dah-Shyang Tsai
學位類別:碩士
校院名稱:國立臺灣科技大學
系所名稱:化學工程研究所
學門:工程學門
學類:化學工程學類
論文種類:學術論文
論文出版年:1993
畢業學年度:81
語文別:中文
論文頁數:1
中文關鍵詞:折射率梯度自我擴散係數
外文關鍵詞:GRINself-diffusion coefficients
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我們利用氯化銣與氯化鋅熔融鹽與 BK1光學玻璃進行離子交換 ,成功的製
備折射率梯度鏡片。 一塊離子交換過的鏡片,兩面完全拋平 ,由一面看出
去可觀察到明顯的放大作用,放大作用緣自於鏡片在徑向的折射率梯度,
此折射率梯度主要由玻璃內鉀離子被熔融鹽內銣離子置換所造成 ,鋅離子
擴散效應侷限於很淺的表面,影響不大。使用非線性離子交換的偏微方程
解可以描述鉀離子與銣離子在折射率梯度玻璃中的濃度分佈, 從而估計鉀
離子、銣離子在玻璃中的自我擴散係數, 鉀離子自我擴散係數活化能為
55.17 kcal/mole、銣離子自我擴散係數活化能為63.89 kcal/mole。曾嘗
試使用氯化鋰與氯化鈣的混合熔融鹽, 但因為鋰離子使BK1和ZK1玻璃結
晶, 嘗試失敗。 也曾嘗試使用焊錫玻璃取代熔融鹽作為離子源, 可以看
到一些有趣的光學效應,但不能確定為何致之,肯定其不是因為離子交換所
引起。在自行製作光學玻璃塊方面亦獲致一些成果, 成功製得肉眼看不見
氣泡、沒有筋紋的高鈦含量玻璃塊,此成份玻璃塊透明度尚佳,但呈淡褐色


The preparation of GRIN lenses through ion-exchange
between BK1 optical glass and molten saltcontaining RbCl and
ZnCl was successful. A magnified imge was obvious by
looking through a so-obtained GRIN lens with two flat
surfaces. The magnification effect was caused by the
refractive index gradient in the radial direction which was
formed mainly due to the repalcement of K ion in glass by Rb
ion from molten salt. Zn ion penetration near surface was
detected, however,its penetration depth was shallow. The
concentration profiles of K and Rb could be properly described
by the solution of a nonlinear partial differential equation by
assuming two monovalent ions underwent ion-exchange. Self-
diffusion coefficients of K and Rb were obtained from the
best fit of concentration of concentration profiles at 450℃
、470℃、 500℃、540℃. The activation energies of K and Rb
for diffusion were 55.17 kcal/mole、63.89 kcal/mole
respectively. Attempts to exchange ions between LiCl/
CaClmolten salt and BK1/ZK1 optical glass failed. Thefailure
was mainly due to the enhancedcrystalliza tion rate with the
presence of Li.Some interesting optical phenomena was noted in
the glass which was immersed in solder glass instead of molten
salt. Nevertheless, we could not explain the cause of it ; we
were sure it was not caused by the ion-exchange. We also
successfully obtained optical glass chunks by melting. The
effort was meant to fabricate optical glass with proper
compositionon our own in the future. This high titania glass
had no bubble, no striae by naked eyes. Unfortunately it was
tinted (light brown).

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