CAJ | 학술논문

研究了Er~(3+)掺杂的高氟浓度的透明氟氧化物玻璃陶瓷的微观结构和光谱性质.采用不同条件制备了两组初始组分为50SiO_2-45PbF_2-5PbO-1ErF_3的样晶,利用氟离子电极对实验样品的最终氟含量进行测定,表明了烧结过程中坩埚加盖可以有效地增加最终生成样品的氟含量.对样品进行了X射线衍射、透射电镜、吸收光谱以及上转换光谱的测试,结果显示,与低氟含量的先驱样品为非晶态不同,高氟含量的先驱样品中出现了β-PbF_2结晶,高分辨透射电镜像表明该结品为球形且颗粒尺寸大约在10～15 nm.吸收光谱、J-O参数和上转换光谱进一步证明了高氟含量的先驱样品中Er~(3+)存在于玻璃基质和β-PbF_2微晶中.退火后,玻璃基质中的Er~(3+)进入了PbF_2微晶中,显示了比退火前强的上转换发光强度.
연구료Er~(3+)참잡적고불농도적투명불양화물파리도자적미관결구화광보성질.채용불동조건제비료량조초시조분위50SiO_2-45PbF_2-5PbO-1ErF_3적양정,이용불리자전겁대실험양품적최종불함량진행측정,표명료소결과정중감과가개가이유효지증가최종생성양품적불함량.대양품진행료X사선연사、투사전경、흡수광보이급상전환광보적측시,결과현시,여저불함량적선구양품위비정태불동,고불함량적선구양품중출현료β-PbF_2결정,고분변투사전경상표명해결품위구형차과립척촌대약재10～15 nm.흡수광보、J-O삼수화상전환광보진일보증명료고불함량적선구양품중Er~(3+)존재우파리기질화β-PbF_2미정중.퇴화후,파리기질중적Er~(3+)진입료PbF_2미정중,현시료비퇴화전강적상전환발광강도.
The microstructure and spectral properties of E~3+ doped transparent oxyfluoride glass ceramics with high fluorine content were reported. Two samples with the same initial contents (50SiO_2-45PbF_2-5PbO-1ErF_3) were prepared under the dif-ferent preparation parameters. The final fluorine contents were detected by a fluoride ion selective electrode. The results shows that the final fluorine contents increase by covering crucibles with corundum lid during melt. The samples were characterized by X-ray diffraction, transmission electron microscopy (TEM), absorption spectra and upconversion luminescence spectra. The re-stilts show that PbF_2 crystals were precipitated in the sample with high fluorine content before heat treatment. And the PbF_2 crystals precipitated inside the glass matrix are spherical with diameters of approximately 10-15 nm in size from the high resolu-tion TEM micrograph. The absorption spectra, J-O parameters and the upconversion spectra show that the Er~(3+) ions were lo-cated in crystalline and vitreous mixed states. It is different from the sample with low fluorine content which is completely amor-phous. After heat treatment, Er~(3+) ions that remain in the glassy phase entered into fluoride nanocrystals in the sample with high fluorine content. The fluorine environment decreases non-radiative transfer which eases the upeonversion processes. Hence, the upconversion luminescence intensity of Er~(3+) ions in the high fluorine content sample after heat treatment is much stronger than that in the precursor sample.