低温燃烧法制备掺钦钇钼石榴石透明陶瓷材料的研究

掺钦钇铝石榴石（Nd:Y3Al5Ol2,Nd：YAG)透明多晶陶瓷和相同化孝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Nd203、Y203、Al(NO3)3·9H2O、柠檬酸为原料,TEOS为烧结添加剂于1100℃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1700℃真空烧结5h得到Nd:YAG透明陶瓷。釆用TG-DTA、XRD、FT-IR、TEM、ESEM和FT-PL等测试手段对（Nd0.01Y0.99)3Al5O12-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1050℃：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%.

Study of Nd: YAG Transparent Ceramic Materials by Low Temperature Combustion Method

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 con?ductivity, Kigh 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 Nd203、Y2〇3、Al ( NO3 )3 ? 9H2O and citric acid as raw materials, TEOS as sintering additive, the (Nd0.01Y0.99)3Al5O12 precursor powder was synthesized at 1100 °C 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 1700 °C in vacuum for 5 hours. The Nd: YAG ceramic material was tested and characterized by measures of TG-DTA, XRD, FT-IR5 TEM，ESEM and FT-PL. The results show that the crystallization temperature of YAG is 850°C and the formation of the intermedi?ate crystal phase YAP created during the heat treatment can be transferred into cubic YAG crystal phase at 1050 °C，the laser wavelength of (Nd0.01Y0.99)3Al5〇12 transparent ceramic is 1.065 μm and there exists a slight red-shift compared to the single crystal with the same chemical composition, the transmittance of (Nd0.01Y0.99)3Al5〇12 increases with lengthening wavelength and the optical transmit?tance is about 45% in the visible region and 58% in the infrared region.