Simple mass-preparation and enhanced thermal performance of Ce: YAG transparent ceramics for high power white LEDs

Yao, Qing1; Zhang, Le2; Zhang, Jing3; Jiang, Zhigang1; Sun, Bingheng2; Shao, Cen2; Ma, Yuelong1; Zhou, Tianyuan2; Wang, Kaigang4; Zhang, Lei5; Chen, Hao2; Wang, Yun1

2019-04

10.1016/j.ceramint.2018.12.121

CERAMICS INTERNATIONAL   影响因子和分区

0272-8842

1873-3956

Ce: YAG transparent ceramics have great potential in the high power white light-emitting diodes based on chip packaging technology due to the superior optical property and thermal conductivity. However, it is still a challenging issue to explore a simple and efficient mass-preparation method and to solve the heat dissipation problem. In this study, the batched Ce: YAG ceramics with different Ce3+ concentrations were fabricated by Isobam gel casting plus vacuum sintering. Their optical properties were systematically investigated and the temperature change, thermal distribution and heat flux were effectively analyzed by ANSYS software. All ceramics were obtained in the optimized 76.0 wt% solid loading slurries composed of 0.3 wt% ammonium citrate tribasic and 0.5 wt% Isobam. The temperature difference between the simulation and the experiment of the Phi 16 mm and Phi 20 mm Ce: YAG ceramics was 0.57 degrees C and 3.48 degrees C at about 120 s in transient thermal state, which indicated that the simulation result was credible. Meanwhile, when the diameter of ceramic was increased by 4 mm, the average temperature was lowered by 20-30 degrees C with the decreasing rate of 5-7.5 degrees C/mm. Therefore, both simulation and experimental results proved that properly increasing the ceramic area was a simple and efficient method to solve the heat dissipation and high temperature problem, and Isobam gel casting had the potential advantages in the simple mass-fabrication of transparent ceramics.

ANSYS Ce: YAG ceramics Isobam gel casting Thermal analysis

SCI ; EI

英语

其他

project of aqueous tape for ultra thin layered MLCCs application[GRCK2017042411005977]

Materials Science

Materials Science, Ceramics

WOS:000459365500146

ELSEVIER SCI LTD

20185206285510

Ceramic materials ; Heat flux ; Light emitting diodes ; Optical properties ; Sintering ; Thermal management (electronics) ; Thermoanalysis ; Yttrium aluminum garnet

Thermodynamics:641.1 ; Heat Transfer:641.2 ; Semiconductor Devices and Integrated Circuits:714.2 ; Light/Optics:741.1 ; Chemistry:801 ; Ceramics:812.1

MATERIALS SCIENCE

Web of Science

1.Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Jiangsu, Peoples R China
2.Jiangsu Normal Univ, Sch Phys & Elect Engn, Jiangsu Key Lab Adv Laser Mat & Devices, Xuzhou 221116, Jiangsu, Peoples R China
3.Wuxi Vocat Inst Arts & Technol, Ceram Inst, Wuxi 214209, Peoples R China
4.Gloria Technol LLC, Xuzhou 221116, Jiangsu, Peoples R China
5.Southern Univ Sci & Technol, SUSTech Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China

Yao, Qing,Zhang, Le,Zhang, Jing,et al. Simple mass-preparation and enhanced thermal performance of Ce: YAG transparent ceramics for high power white LEDs[J]. CERAMICS INTERNATIONAL,2019,45(5):6356-6362.

Yao, Qing.,Zhang, Le.,Zhang, Jing.,Jiang, Zhigang.,Sun, Bingheng.,...&Wang, Yun.(2019).Simple mass-preparation and enhanced thermal performance of Ce: YAG transparent ceramics for high power white LEDs.CERAMICS INTERNATIONAL,45(5),6356-6362.

Yao, Qing,et al."Simple mass-preparation and enhanced thermal performance of Ce: YAG transparent ceramics for high power white LEDs".CERAMICS INTERNATIONAL 45.5(2019):6356-6362.