純粹한 LiNbO₃單結晶과 希土類元素를 첨가한 LiNbO₃單結晶의 焦電氣에 관한 硏究 = A Study on the Pyroelectricity of Pure LiNbO₃Single Crystal and LiNbO₃Single Crystal doped with Rare Earth

다국어 초록 (Multilingual Abstract)

This study was about pyroleectricity of a pure LiNbO₃single crystal and LiNbO₃ cultivated by doping impurities to Rare earth of Sm, Eu, Dy, and it was directly
measured by electric potential method.
1) The increase of λevaluation of a pure LiNbO₃sigle crystal was rapid in proportion to the increase of temperature, but that of congruent state was slow.
2) The crystal doped and poled by Sm 0.1 wt% was a stabilized crystal because of the slowness in the increase of λevaluation in the increase of tempeature, but the unpoling crystal was an unstabilized one.
3) Sm 0.05wt% was 1 point high in the λevaluation compared with Sm 0.1 wt%, and was similar in evaluation to stoichometric (pure LiNbO₃)in case doping rate was slow, and the λevaluation of Sm 0.1wt%was equal to congruent.
4) Eu,0.1wt% and Sm 0.1wt%(unpolhg) had the same tendancy in the variation phenomena of λevaluation according to the change in temperature.
5) Dy 0.1wt% was 1 point high in λevaluation of Sm 0.1wt%, and it can be a stabilized element in view of the change of λevaluation.

목차 (Table of Contents)

• Ⅰ. 序 論
• Ⅱ. 實 驗
• 1. 實驗方法
• 2. 實驗裝置
• Ⅲ. 實驗結果 및 論意
• 1. 豫備實驗
• 2. 焦電係數의 計算
• 3. LiNbO₃: pure LiNbO₃의 焦電係數
• 4. Rare earth를 첨가한 경우의 λ-T curve
• Ⅳ. 結 論
• 參考文獻
• Abstract