摘要
简单介绍了白光发光二极管(LED)中与荧光转换材料和封装工艺相关的现状和存在问题,重点介绍了烁光特晶科技有限公司研制的新型铝酸镁荧光透明陶瓷材料。采用自制的铝酸镁粉体分别混合自制和市售的荧光粉制备了荧光透明陶瓷,对其加工并替代传统白光LED中的荧光粉层和环氧树脂封装外壳进行了封装测试。由于荧光转换物质在透明陶瓷中均匀分布,解决了传统工艺中荧光粉易沉降的问题,有利于出光的均匀性;陶瓷材料比树脂等有机材料热导率高,加快了散热;同时,荧光陶瓷机械强度高、耐腐蚀、耐磨损,可直接作为封装外壳,简化了封装工艺,可拓展LED的应用范围。
Fluorescence and packaging material are briefly introduced in this paper.Then the novel transparent phosphor ceramic shell of white LED researched by Bright Crystals Technology,Inc.is reported.Using MgAl2O4 powder mixed with phosphor commercial or homemade,the transparent phosphor ceramic was sintered,machined,packaged and tested.Because of the uniform distribution of the phosphor in transparent ceramic,this method avoids the precipitation of phosphor in resin and improves the uniformity of the light.Owing to higher thermal conductivity than resin,ceramic material can accelerate the cooling of LED.Meanwhile,the transparent ceramic has excellent mechanical performance;it can be used to package LED directly.This research will extend the application field of LED.
出处
《真空电子技术》
2011年第2期43-46,共4页
Vacuum Electronics
关键词
铝酸镁
透明陶瓷
荧光陶瓷
发光二极管
封装材料
MgAl2O4
Transparent ceramic
Phosphor ceramic
Light emitting diode
Packaging material
