共 53 条
Luminescence intensity ratio based wide range contactless temperature sensing properties of Er3+/Yb3+ions co-doped La2Ti2O7 ceramics
被引:12
作者:
Swami, Ravina
[1
]
Shandilya, Ankur
[2
]
Shukla, A. K.
[3
]
Kumar, P. Senthil
[1
]
Sreenivas, K.
[1
]
机构:
[1] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India
[2] Univ Delhi, Hindu Coll, Dept Phys, Delhi 110007, India
[3] Amity Univ, Amity Inst Appl Sci, Dept Phys, Noida 201313, Uttar Pradesh, India
关键词:
Ceramics;
Upconversion luminescence;
Optical temperature sensing;
UP-CONVERSION LUMINESCENCE;
X-RAY;
ENERGY-TRANSFER;
BEHAVIOR;
GREEN;
ER3+;
PR;
ND;
LA;
D O I:
10.1016/j.jallcom.2023.169610
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Temperature sensing in the range (93-773 K) using luminescence intensity ratio method has been studied in rare earth ion modified La2-x-yErxYbyTi2O7 powders and ceramics. The optimised composition with (x = 0.025, y = 0.05) shows improved upconversion luminescence. For temperature sensing applications the need for excellent phase purity and better densification is emphasized in ceramics. In comparison to phase-impure calcined powders, single phase dense ceramic shows improved upconversion emission and better thermometric performance. The sintered ceramic is found useful for non-contact temperature sensing with a wider operating temperature range (243-1293 K) in comparison to calcined powders (163-863 K). The optimised phosphor in ceramic form exhibits good linearity in the range (173-393 K). Repeatability ex-periments reveal measurement accuracy within the range - 0.5 to + 0.8 K. Repeated heating and cooling cycles from 190 to 455 K show minimal thermal fatigue. The precision of the temperature read-out from the optical sensor by the intensity ratio method is found to be better (0.24%) at higher temperatures (> 373 K) in comparison to the estimated precision of 2.1% at lower temperatures.(c) 2023 Elsevier B.V. All rights reserved.
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页数:13
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