基于长余辉铝酸锶盐的夜光玻璃的制备与表征
发布时间：2018-11-24 12:37
【摘要】：稀土掺杂铝酸锶长余辉发光材料是一种光功能材料,已经广泛地应用在显示、光纤通讯、储能、激光等领域。但由于以粉体形式存在的铝酸锶盐价格相对较高,且其性能易受水汽的影响,因而稳定性差。而玻璃作为一种透明、稳定、坚固的基质材料,拥有很好的力学、化学、光学以及机械性能,如果把发光粉与玻璃结合得到的夜光玻璃,使得铝酸锶粉体包裹在玻璃之中,不但能有效降低成本,便于加工成各种形状,而且可以提高铝酸锶发光粉的稳定性。本文通过把硼硅酸盐玻璃粉和铝酸锶发光粉混合后高温溶化后浇铸形成夜光玻璃,成功获得了具有良好发光性能且稳定性很好的夜光玻璃。制备时采用两步法,第一步先通过高温烧制所得的玻璃在冷却后利用球磨机粉碎成40um大小的玻璃粉,然后把玻璃粉与市售长余辉铝酸锶发光粉混合均匀后,再采用高温烧结成玻璃。通过荧光光谱、漫反射光谱、X射线近边吸收谱等研究了玻璃基质中H_3BO_3含量、发光粉浓度、烧制温度和保温时间等不同参数对夜光玻璃性能的影响。得到下列几点结论:玻璃的X射线衍射分析结果证明,本文的铝酸锶相含两种晶相:SrAl_2O_4:Eu~(2+),Dy~(3+)(发射波长为520nm)和Sr_4Al_(14)O_(25):Eu~(2+),Dy~(3+)(发射波长为490nm)。夜光玻璃中含有铝酸锶相,证明制成玻璃后成分未改变。随着实验条件的改变,两者在玻璃中的发光强度的相对比值会发生改变。研究铝酸锶发光粉含量对夜光玻璃发光性能的影响。过高的铝酸锶粉末含量会令夜光玻璃的发光强度反而下降,同时其透明度劣化。选择粉体含量在3wt%至7wt%之间的含量作为实验研究范围,发现夜光玻璃的发光强度先随发光粉的含量增加而增加,但当铝酸锶粉与玻璃粉的质量比大于5wt%时,发光强度下滑。因此,铝酸锶粉末在玻璃基质中的含量不宜超过5wt%。对玻璃基质中的H_3BO_3含量对夜光玻璃性能的影响进行研究。发现夜光玻璃的发光强度先为先随H_3BO_3的含量增加而增加,但当含量比大于5mol%时,夜光玻璃的发光强度反而下降。同时,实验发现,夜光玻璃的发光峰的峰值随H_3BO_3含量的增加发生红移。熔制温度对夜光玻璃的性能有重要影响。随着烧结温度的升高,玻璃的透明度提高,发光强度先上升,随后下降,发光波长发生蓝移。综合比较,我们认为最佳熔制温度为750℃。夜光玻璃的发光强度随烧结时的保温时间有关。发光强度随着保温时间的延长而指数下降,发光峰位也发生。进行了样品的环境稳定性测试,发现相同的暴露环境下,不同放置时间下,长余辉夜光玻璃的性能几乎没有变化,而粉体材料发光性能下降明显。
[Abstract]:Rare earth doped strontium aluminate long afterglow material is a kind of optical functional material, which has been widely used in display, optical fiber communication, energy storage, laser and other fields. However, because of the relatively high price of strontium aluminate in the form of powder, and its property is easily affected by water vapor, the stability is poor. And glass, as a transparent, stable, solid substrate, has good mechanical, chemical, optical and mechanical properties. If you combine luminous powder with glass, you get luminous glass, so that strontium aluminate powder is wrapped in the glass. It can not only reduce the cost, but also improve the stability of strontium aluminate luminescent powder. By mixing borosilicate glass powder with strontium aluminate luminescent powder and melting at high temperature to form night-light glass, a luminescent glass with good luminescence property and good stability has been successfully obtained. At the first step, the glass prepared by high temperature sintering was cooled and crushed to 40um size glass powder by ball mill. Then the glass powder was mixed evenly with the long aftermarket strontium aluminate luminescent powder. Then the glass is sintered at high temperature. The effects of H_3BO_3 content, concentration of luminescent powder, sintering temperature and holding time on the properties of luminescent glass were studied by fluorescence spectrum, diffuse reflectance spectroscopy and X-ray near-edge absorption spectroscopy. The following conclusions are obtained: the X-ray diffraction results of glass show that the strontium aluminate phase in this paper contains two crystalline phases: SrAl_2O_4:Eu~ (2). Dy~ (3) (emission wavelength is 520nm) and Sr_4Al_ (14) O _ (25): Eu~ (2), Dy~ (3) (emission wavelength is 490nm). The luminous glass contains strontium aluminate phase, which proves that the composition of glass has not changed. With the change of experimental conditions, the relative ratio of luminescence intensity in glass will change. The effect of strontium aluminate luminescence powder content on luminescent properties of luminous glass was studied. Too much strontium aluminate powder can decrease the luminous intensity and decrease the transparency of luminous glass. The luminescence intensity of luminescent glass increased with the increase of luminescent powder content, but when the mass ratio of strontium aluminate powder to glass powder was more than 5 wt%, the content of powder was between 3 and 7 wt%. The luminous intensity drops. Therefore, the content of strontium aluminate powder in glass substrate should not exceed 5 wtcm. The effect of H_3BO_3 content in glass matrix on the properties of luminous glass was studied. It was found that the luminescence intensity of the luminescent glass first increased with the increase of H_3BO_3 content, but the luminescence intensity of the luminescent glass decreased when the content ratio was more than 5 mol%. At the same time, it was found that the peak of luminescent glass shifted red with the increase of H_3BO_3 content. The melting temperature has an important effect on the properties of luminous glass. With the increase of sintering temperature, the transparency of the glass increases, the luminescence intensity increases first, then decreases, and the luminous wavelength is blue shifted. The optimum melting temperature is 750 鈩，
本文编号：2353750
[Abstract]:Rare earth doped strontium aluminate long afterglow material is a kind of optical functional material, which has been widely used in display, optical fiber communication, energy storage, laser and other fields. However, because of the relatively high price of strontium aluminate in the form of powder, and its property is easily affected by water vapor, the stability is poor. And glass, as a transparent, stable, solid substrate, has good mechanical, chemical, optical and mechanical properties. If you combine luminous powder with glass, you get luminous glass, so that strontium aluminate powder is wrapped in the glass. It can not only reduce the cost, but also improve the stability of strontium aluminate luminescent powder. By mixing borosilicate glass powder with strontium aluminate luminescent powder and melting at high temperature to form night-light glass, a luminescent glass with good luminescence property and good stability has been successfully obtained. At the first step, the glass prepared by high temperature sintering was cooled and crushed to 40um size glass powder by ball mill. Then the glass powder was mixed evenly with the long aftermarket strontium aluminate luminescent powder. Then the glass is sintered at high temperature. The effects of H_3BO_3 content, concentration of luminescent powder, sintering temperature and holding time on the properties of luminescent glass were studied by fluorescence spectrum, diffuse reflectance spectroscopy and X-ray near-edge absorption spectroscopy. The following conclusions are obtained: the X-ray diffraction results of glass show that the strontium aluminate phase in this paper contains two crystalline phases: SrAl_2O_4:Eu~ (2). Dy~ (3) (emission wavelength is 520nm) and Sr_4Al_ (14) O _ (25): Eu~ (2), Dy~ (3) (emission wavelength is 490nm). The luminous glass contains strontium aluminate phase, which proves that the composition of glass has not changed. With the change of experimental conditions, the relative ratio of luminescence intensity in glass will change. The effect of strontium aluminate luminescence powder content on luminescent properties of luminous glass was studied. Too much strontium aluminate powder can decrease the luminous intensity and decrease the transparency of luminous glass. The luminescence intensity of luminescent glass increased with the increase of luminescent powder content, but when the mass ratio of strontium aluminate powder to glass powder was more than 5 wt%, the content of powder was between 3 and 7 wt%. The luminous intensity drops. Therefore, the content of strontium aluminate powder in glass substrate should not exceed 5 wtcm. The effect of H_3BO_3 content in glass matrix on the properties of luminous glass was studied. It was found that the luminescence intensity of the luminescent glass first increased with the increase of H_3BO_3 content, but the luminescence intensity of the luminescent glass decreased when the content ratio was more than 5 mol%. At the same time, it was found that the peak of luminescent glass shifted red with the increase of H_3BO_3 content. The melting temperature has an important effect on the properties of luminous glass. With the increase of sintering temperature, the transparency of the glass increases, the luminescence intensity increases first, then decreases, and the luminous wavelength is blue shifted. The optimum melting temperature is 750 鈩，
本文编号：2353750
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