摘要
掺钕钇铝石榴石(Nd:Y3Al5O12,Nd:YAG)透明多晶陶瓷和相同化学组成的单晶相比具有容易制造、成本低、尺寸大、掺杂浓度高、热导率高、热稳定性高、可大批量生产、易实现多层和多功能的陶瓷结构等优点,成为了单晶最有力的替代者。采用低温燃烧法以Nd2O3、Y2O3、Al(NO3)3.9H2O、柠檬酸为原料,TEOS为烧结添加剂于1 100℃合成出分散均匀、轻微硬团聚、超细、YAG立方晶相(Nd0.01Y0.99)3Al5O12前驱体粉末,经过1 700℃真空烧结5 h得到Nd:YAG透明陶瓷。采用TG-DTA、XRD、FT-IR、TEM、ESEM和FT-PL等测试手段对(Nd0.01Y0.99)3Al5O12陶瓷材料进行表征。研究结果表明:YAG的析晶温度为850℃,在热处理过程中出现少量的YAP中间相,于1 050℃转变成YAG立方晶相;(Nd0.01Y0.99)3Al5O12陶瓷材料的激光工作波长为1.065μm,和相同组分的单晶相比存在轻微的红移;随着透射光波长的增加,透光率逐渐增加,在可见光区透光率约为45%,在近红外光区透光率约为58%.
Neodymium doped-yttrium aluminum garnet （Nd： YAG） transparent polycrystalline ceramic has the advantages of easy fabrication, low cost, large size, high doping concentration, high heat conductivity, high heat stability, mass manufacture, multi-layer and multi-function compared with single crystal of the same chemical composition. It has already become a substitute of single crystal. By using Nd2O3,Y2O3, Al（NO3）3·9H2O and citric acid as raw materials, TEOS as sintering additive, the （Nd0.01Y0.99）3Al5O12 precursor powder was synthesized at 1 100℃ by the low temperature combustion method. The Nd：YAG precursor powder has the features of loose dispersion, slight agglomeration, super fine and YAG cubic crystal phase. The Nd： YAG transparent ceramic was fabricated from the precursor powder being sintered at 1 700 ℃ in vacuum for 5 hours. The Nd： YAG ceramic material was tested and characterized by measures of TG-DTA, XRD, FT-IR, TEM, ESEM and FT-PL. The results show that the crystallization temperature of YAG is 850 ℃ and the formation of the intermediate crystal phase YAP created during the heat treatment can be transferred into cubic YAG crystal phase at 1 050 ℃, the laser wavelength of （Nd0.01Y0.99）3Al5O12 transparent ceramic is 1.065μm and there exists a slight red-shift compared to the single crystal with the same chemical composition, the transmittance of （Nd0.01Y0.99）3Al5O12 increases with lengthening wavelength and the optical transmittance is about 45 % in the visible region and 58 % in the infrared region.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2007年第3期324-328,共5页
Acta Armamentarii
基金
教育部博士点基金项目(20050186004)
关键词
材料合成与加工工艺
掺钕钇铝石榴石
透明陶瓷
激光材料
低温燃烧法
material synthesis and processing technology
neodymium doped-yttrium aluminum garnet
transparent ceramic
laser material
low temperature combustion method
