CAJ | 학술논문

利用气悬浮无容器技术制备出了Nd3＋/Yb3＋稀土离子共掺杂的TiO2-La2O3-ZrO2(TLZ)发光玻璃.利用差热分析(DTA)技术研究了该类新型稀土掺杂TiO2基上转换发光玻璃的热稳定性,主要包括玻璃化转变温度、析晶起始温度以及析晶峰值温度.并采用两种热分析动力学计算方法得到TLZ玻璃的析晶活化能值和指前因子.本文还研究了TLZ发光玻璃的力学性能,发现其维氏硬度大小为7.50 GPa,断裂韧性大于1.20 MPa?m1/2.此外,还对TLZ玻璃在808 nm激光激发下的上转换发光性能进行了研究,实验结果显示光谱中有三个强发射谱峰.优异的上转换发光性能以及良好的热稳定性和机械性能表明,这类新材料在上转换器件的实际应用中具有很大的潜力.
이용기현부무용기기술제비출료Nd3＋/Yb3＋희토리자공참잡적TiO2-La2O3-ZrO2(TLZ)발광파리.이용차열분석(DTA)기술연구료해류신형희토참잡TiO2기상전환발광파리적열은정성,주요포괄파리화전변온도、석정기시온도이급석정봉치온도.병채용량충열분석동역학계산방법득도TLZ파리적석정활화능치화지전인자.본문환연구료TLZ발광파리적역학성능,발현기유씨경도대소위7.50 GPa,단렬인성대우1.20 MPa?m1/2.차외,환대TLZ파리재808 nm격광격발하적상전환발광성능진행료연구,실험결과현시광보중유삼개강발사보봉.우이적상전환발광성능이급량호적열은정성화궤계성능표명,저류신재료재상전환기건적실제응용중구유흔대적잠력.
In the present work, Nd3+/Yb3+co-doped TiO2-La2O3-ZrO2 (TLZ) glasses which were previously prepared by the aerodynamic levitation method were characterized by thermal differential analysis (DTA) and micro-hardness tests. The DTA technique was used to study the thermal stability of the characteristic temperatures, the glass transition temperature (Tg), the crystal ization onset temperature (Tc), and the crystal ization peak temperature (Tp), of the rare earth doped titanate glasses. The thermal kinetic DTA-analysis of the Nd3+/Yb3+co-doped TLZ glasses was studied at heating rates of 5, 10, 15, 20 K?min-1. The activation energy (Ea) and the pre-exponential factor (A) were obtained by the Kissinger and Friedman methods. In addition, the Vickers hardness was higher than 7.50 GPa and fracture toughness was higher than 1.20 MPa?m1/2 for al the investigated TLZ glasses by the micro-hardness test. Furthermore, the upconversion luminescence property was investigated at 808 nm laser excitation, and three intense upconversion emission bands were observed. The excellent upconversion fluorescence, good thermal stability, and high mechanical strength suggested that this class of materials has potential for practical application in frequency upconversion devices.