钒酸钇和磷酸盐基发光荧光粉的分散性和表面表征

2018 IEEE International Conference on Electrical Engineering and Photonics (EExPolytech) Pub Date : 2018-10-01 DOI:10.1109/EEXPOLYTECH.2018.8564374

T. Minakova, N. Eremina, S. Mjakin, V. Bakhmetyev, M. Sychov, L. Svatovskaya, Dmitry I. Dolzhenko, A. Sychova

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引用次数: 1

摘要

采用低温氮吸附、扫描电镜、水浆pH测定和酸碱指示剂吸附等方法，研究了自蔓延高温合成的不同铕含量的Eu(III)活化钒酸钇、磷酸钇和混合钒酸钇-磷酸荧光粉的表面性质。在相似条件下合成的材料中，磷酸盐基荧光粉的表面酸性明显更强(由于存在Lewis酸性中心，可能与磷原子相对应)，分散性较钒酸盐类似物较粗，而钒酸-磷酸盐混合化合物的分散性最精细。

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Dispersity and Surface Characterization of Yttrium Vanadate and Phosphate Based Luminescent Phosphors

The surface properties of Eu(III)-activated yttrium vanadate, yttrium phosphate and mixed yttrium vanadate-phosphate phosphors with different europium content synthesized via self-propagating high temperature synthesis are studied by low temperature nitrogen adsorption, scanning electron microscopy, aqueous slurry pH measurements and adsorption of acid-base indicators. Among the materials synthesized under similar conditions, phosphate based phosphors possess with a significantly more acidic surface (due to the presence of Lewis acidic centers probably corresponding to phosphorous atoms) and coarse dispersity compared with vanadate analogs, while mixed vanadate-phosphate compounds feature with the most fine dispersity.

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2018 IEEE International Conference on Electrical Engineering and Photonics (EExPolytech)

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