| Nd3+，La3+共掺杂氧化钇透明陶瓷的制备及其性能 | |
| Synthesis and Optical Properties of Nd3+, La3+ Codoped Y2O3 Transparent Ceramics | |
| 摘要: 采用氨水共沉淀法制备出Nd3+，La3+共掺杂氧化钇粉体，将粉体在1 700 ℃真空条件下烧结4h成功制备出高质量的Nd3+，La3+共掺杂氧化钇透明陶瓷。对粉体和透明陶瓷样品的显微结构、光谱特性等用XRD、SEM、UV-Vis、FL等手段进行了表征和研究。结果表明：Nd3+和La3+均匀地溶解于氧化钇晶格之中，从而使氧化钇原有晶格常数变大，有序度下降。1 100 ℃煅烧后粉体颗粒大小均匀，近似球形，粒径约60 nm，粉体具有Nd3+特有的荧光发射光谱特性。烧结后，透明陶瓷晶粒均匀，粒径约22.2 μm，晶粒内和晶界处都未见气孔存在；样品(厚度为2 mm)对800 nm光的透过率高达76%；主吸收峰位于821 nm处，吸收峰半高宽为5 nm。4F3/2→4I11/2这组发射跃迁的强度最大，荧光发射主峰位于 1 078 nm处，适合于作为激光透明陶瓷应用。 | |
| 关键词: 透明陶瓷 氧化钇粉体 共沉淀法 | |
| 基金项目: | |
| Abstract: Nd3+,La3+∶Y2O3 nanocrystalline powder was prepared by co-precipitation method. The 2% Nd, 3% La codoped Y2O3 transparent ceramic was fabricated by vacuum sintering at 1 700 ℃ for 4 h. The structural, morpho-logical and luminescence properties of the sample were characterized by low temperature N2 adsorption-desorption, SEM, XRD, UV-Vis and fluorescence analysis. The results show that Nd3+ and La3+ dissolves completely in the Y2O3 cubic phase and the lattice parameters become bigger. After calcining at 1 100 ℃ for 4 h, the particles are nearly spherical with narrow size distribution with the average diameter of 60～80 nm. Transparent polycrystalline ceramics with uniform lanthanum distribution was obtained. The grain size was around 22 μm. The in-line transmittance of the transparent ceramics exceeded 76% at 800 nm for 2 mm thick samples. The main absorption peak centered at 821 nm. | |
| Keywords: transparent ceramic yttrium powder co-precipitation method | |
| 摘要点击次数: 1415 | |
| 全文下载次数: 1881 | |
| 黄毅华,江东亮,张景贤,林庆玲.Nd3+，La3+共掺杂氧化钇透明陶瓷的制备及其性能[J].无机化学学报,2009,25(4):571-577. | |
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