The effect of Nd 3+ concentration on fabrication, microstructure and luminescent properties of anisotropic S‐FAP ceramics
The effect of Nd 3+ concentration on fabrication, microstructure and luminescent properties of anisotropic S‐FAP ceramics
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DOI：
10.1111/jace.18284
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发表时间：
2021-12
影响因子：
3.9
通讯作者：
Yongqiang Zhang;Zhiwei Zhou;Weiwei Li;Y. Yang;B. Mei;Zaichun Sun
中科院分区：
文献类型：
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作者：
Yongqiang Zhang;Zhiwei Zhou;Weiwei Li;Y. Yang;B. Mei;Zaichun Sun
使用共沉淀法制备具有化学式Sr 5（PO 4）3F的Nd 3+掺杂的氟磷酸锶（S-FAP）纳米粉末。所制备的粉体无杂质相，晶粒尺寸约为30 nm，Nd 3+离子在氟磷酸锶中的掺杂极限约为9 at.%。Nd 3+的掺杂浓度决定了产物的形貌和粒径。采用简单的热压法成功制备了不同Nd 3+掺杂浓度的各向异性Nd：S-FAP透明陶瓷。随着Nd 3+掺杂量的增加，S-FAP透明陶瓷的晶粒尺寸先减小后增大。2at.% Nd：S-FAP陶瓷在所有波长范围内呈现最高的光学透射率。从吸收光谱中观察到Nd 3+离子从基态到激发态的特征跃迁，计算出吸收截面为3.71 × 10- 20 cm 2。在796 nm激发下，研究了Nd 3+离子浓度对荧光强度和荧光寿命的影响。用Judd-Ofelt（J-O）理论计算了Nd：S-FAP晶体中4F 3/2→ 4 I9/2跃迁的强发射。
Nd3+doped strontium fluorophosphate (S‐FAP), with chemical formula Sr5(PO4)3F, nanopowders were prepared using the co‐precipitation method. The prepared powders had no impurity phase with a grain size of about 30 nm and the doping limit of Nd3+ions in strontium fluorophosphate is about 9 at.%. The morphology and particle size were determined by the doping concentration of Nd3+. Anisotropic Nd: S‐FAP transparent ceramics with different Nd3+doping concentrations were fabricated successfully by the simple hot‐pressing method. The grain size of prepared S‐FAP transparent ceramics decreased first and then increased with the increase of Nd3+concentration. The 2 at.% Nd: S‐FAP ceramic presented the highest optical transmittance at all wavelengths range. The characteristic transitions from the ground state to the excited states of Nd3+ions were observed from the absorption spectra, and the absorption cross‐section was calculated at 3.71 × 10–20cm2. The influence of Nd3+ion concentration on luminescence intensity and fluorescence lifetime was studied under 796 nm excitation. The strong emission of4F3/2→4I9/2transition in Nd: S‐FAP was calculated by Judd–Ofelt (J‐O) theory.