激光与光电子学进展, 2018, 55 (11): 111602, 网络出版: 2019-08-14  

YAG∶Ce 3+荧光粉制备陶瓷的低温烧结与性能 下载: 771次

Low-Temperature Sintering and Properties of Ceramics Fabricated from YAG∶Ce 3+ Phosphor Powder
作者单位
南京航空航天大学材料科学与技术学院, 江苏 南京 210016
摘要
以钇铝石榴石(YAG)∶Ce 3+荧光粉为原料,采用固相烧结法制备了YAG陶瓷。通过溶胶-凝胶法在粉体表面包覆活性SiO2,添加CuO-TiO2复相烧结助剂以改善YAG陶瓷的烧结性能。对粉体粒径、包覆前后的光学性能、显微形貌进行了分析,研究了YAG陶瓷结构和力学性能。研究结果表明,臼式研磨与球磨能有效降低粉体的粒度,SiO2包覆促进了陶瓷的致密化烧结过程;当包覆量(质量分数)为2%时,YAG陶瓷的烧结温度降至1575 ℃,致密度达到96.3%,洛氏硬度为87.6 HRA,断裂韧性为1.8 MPa·m 1/2。CuO-TiO2复合烧结助剂的助烧效果优于CuO单一烧结助剂的,当CuO-TiO2的质量分数为2%、 CuO与TiO2的质量比为1∶2时,YAG陶瓷的烧结温度降至1450 ℃,洛氏硬度为88.5 HRA,断裂韧性为1.7 MPa·m 1/2
Abstract
The yttrium aluminum garnet(YAG) ceramics are prepared by using the solid-phase sintering with YAG∶Ce 3+ phosphor powder as the raw material. In order to improve the sintering performances of YAG ceramics, the active SiO2 is coated on the YAG∶Ce 3+ phosphor powder surface by the sol-gel method and the CuO-TiO2 composite phase is added as sintering aids. The particle size, the optical performances before and after coating, and the micro-morphologies of the phosphor powder are analyzed and the mechanical properties and microstructures of YAG ceramics are investigated. The research results show that the particle size can be effectively reduced by grinding and ball-milling. The sintering and densification process of ceramics is promoted by the coating of the active SiO2. When the coating amount (mass fraction) is 2%, the sintering temperature of YAG ceramics is decreased to 1575 ℃, the relative density reaches 96.3%, the rock-well hardness is 87.6 HRA, and the fracture toughness is 1.8 MPa·m 1/2. Moreover, the sintering effect of the CuO-TiO2 composite sintering aids is superior to that of the CuO single sintering aids. When the mass fraction of CuO-TiO2 is 2% and the mass ratio between CuO and TiO2 is 1∶2, the sintering temperature of the YAG ceramics is reduced to 1450 ℃, the rock-well hardness is 88.5 HRA, the fracture toughness is 1.7 MPa·m 1/2.

谢小彤, 朱海涛, 刘贺, 何钦江, 傅仁利. YAG∶Ce 3+荧光粉制备陶瓷的低温烧结与性能 [J]. 激光与光电子学进展, 2018, 55(11): 111602. Xiaotong Xie, Haitao Zhu, He Liu, Qinjiang He, Renli Fu. Low-Temperature Sintering and Properties of Ceramics Fabricated from YAG∶Ce 3+ Phosphor Powder [J]. Laser & Optoelectronics Progress, 2018, 55(11): 111602.

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