Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (3): 289-296.DOI: 10.15541/jim20210518

Special Issue: 增材制造专题(2022) 【虚拟专辑】增材制造及3D打印(2021-2022)

• RESEARCH ARTICLE • Previous Articles     Next Articles

Photo Curing and Pressureless Sintering of Orange-emitting Glass-ceramics

LI Qi1(), HUANG Yi1, QIAN Bin2, XU Beibei1, CHEN Liying1, XIAO Wenge1(), QIU Jianrong1()   

  1. 1. School of Optical Science and Engineering, Zhejiang University, Hangzhou 310027, China
    2. Ningbo Ingenuity Rapid Prototyping Technology Co., Ltd., Ningbo 315000, China
  • Received:2021-08-23 Revised:2021-09-24 Published:2022-03-20 Online:2021-11-01
  • Contact: XIAO Wenge, lecturer. E-mail:; QIU Jianrong, professor. Email:
  • About author:LI Qi (1998-), female, Master candidate. E-mail:
  • Supported by:
    Provincial Key R&D Program of Zhejiang(2021C01024);China Postdoctoral Science Foundation(2021M692840);Open Fund of the State Key Laboratory of Modern Optical Instrumentation, Zhejiang University


Because of low thermal conductivity and weak physical and chemical stabilities, traditional “phosphor in silicone” color converters are precluded from high-power white LED applications. All-inorganic bulk luminescence materials not only can circumvent organic encapsulation, but also have higher thermal conductivity. However, those bulk materials are high in cost and very difficult to be shaped into three-dimensional structures. Here, based on amorphous silica nanoparticles, a slurry, containing (Gd,Y)AG:Ce phosphor powders and can be polymerized under UV light, were developed. Bulk (Gd,Y)AG:Ce-silica glass composites were prepared successfully through photo curing, debinding in air and pressureless sintering. Under excitation of blue light, these luminescence glass-ceramics exhibit broadband orange emission peaking at 575 nm with internal quantum efficiency higher than 90%. Our results show that the interfacial reaction between (Gd,Y)AG:Ce and silica glass is very weak, and thus the former can be well embedded into bulk silica glass. Such all-inorganic color converters were further used to fabricate high-power warm white LEDs with correlated color temperature smaller than 4500 K, color rendering index higher than 75, and luminous efficiency of 74 lm·W -1. Luminescence saturation threshold of the as-fabricated laser lighting device is as high as 2.84 W·mm-2, where its luminous flux can achieve 180 lm. Moreover, preparation of (Gd,Y)AG: Ce-silica glass composites is compatible to 3D printing technology, thus allowing the mass manufacturing of color converters with complex 3D structures, which may promote personalization and modularization of high-power white LEDs.

Key words: glass-ceramics, phosphors, warm white light, 3D printing

CLC Number: