【摘要】：稀土摻雜鋁酸鍶長(zhǎng)余輝發(fā)光材料是一種光功能材料,已經(jīng)廣泛地應(yīng)用在顯示、光纖通訊、儲(chǔ)能、激光等領(lǐng)域。但由于以粉體形式存在的鋁酸鍶鹽價(jià)格相對(duì)較高,且其性能易受水汽的影響,因而穩(wěn)定性差。而玻璃作為一種透明、穩(wěn)定、堅(jiān)固的基質(zhì)材料,擁有很好的力學(xué)、化學(xué)、光學(xué)以及機(jī)械性能,如果把發(fā)光粉與玻璃結(jié)合得到的夜光玻璃,使得鋁酸鍶粉體包裹在玻璃之中,不但能有效降低成本,便于加工成各種形狀,而且可以提高鋁酸鍶發(fā)光粉的穩(wěn)定性。本文通過(guò)把硼硅酸鹽玻璃粉和鋁酸鍶發(fā)光粉混合后高溫溶化后澆鑄形成夜光玻璃,成功獲得了具有良好發(fā)光性能且穩(wěn)定性很好的夜光玻璃。制備時(shí)采用兩步法,第一步先通過(guò)高溫?zé)扑玫牟Ａг诶鋮s后利用球磨機(jī)粉碎成40um大小的玻璃粉,然后把玻璃粉與市售長(zhǎng)余輝鋁酸鍶發(fā)光粉混合均勻后,再采用高溫?zé)Y(jié)成玻璃。通過(guò)熒光光譜、漫反射光譜、X射線(xiàn)近邊吸收譜等研究了玻璃基質(zhì)中H_3BO_3含量、發(fā)光粉濃度、燒制溫度和保溫時(shí)間等不同參數(shù)對(duì)夜光玻璃性能的影響。得到下列幾點(diǎn)結(jié)論:玻璃的X射線(xiàn)衍射分析結(jié)果證明,本文的鋁酸鍶相含兩種晶相:SrAl_2O_4:Eu~(2+),Dy~(3+)(發(fā)射波長(zhǎng)為520nm)和Sr_4Al_(14)O_(25):Eu~(2+),Dy~(3+)(發(fā)射波長(zhǎng)為490nm)。夜光玻璃中含有鋁酸鍶相,證明制成玻璃后成分未改變。隨著實(shí)驗(yàn)條件的改變,兩者在玻璃中的發(fā)光強(qiáng)度的相對(duì)比值會(huì)發(fā)生改變。研究鋁酸鍶發(fā)光粉含量對(duì)夜光玻璃發(fā)光性能的影響。過(guò)高的鋁酸鍶粉末含量會(huì)令夜光玻璃的發(fā)光強(qiáng)度反而下降,同時(shí)其透明度劣化。選擇粉體含量在3wt%至7wt%之間的含量作為實(shí)驗(yàn)研究范圍,發(fā)現(xiàn)夜光玻璃的發(fā)光強(qiáng)度先隨發(fā)光粉的含量增加而增加,但當(dāng)鋁酸鍶粉與玻璃粉的質(zhì)量比大于5wt%時(shí),發(fā)光強(qiáng)度下滑。因此,鋁酸鍶粉末在玻璃基質(zhì)中的含量不宜超過(guò)5wt%。對(duì)玻璃基質(zhì)中的H_3BO_3含量對(duì)夜光玻璃性能的影響進(jìn)行研究。發(fā)現(xiàn)夜光玻璃的發(fā)光強(qiáng)度先為先隨H_3BO_3的含量增加而增加,但當(dāng)含量比大于5mol%時(shí),夜光玻璃的發(fā)光強(qiáng)度反而下降。同時(shí),實(shí)驗(yàn)發(fā)現(xiàn),夜光玻璃的發(fā)光峰的峰值隨H_3BO_3含量的增加發(fā)生紅移。熔制溫度對(duì)夜光玻璃的性能有重要影響。隨著燒結(jié)溫度的升高,玻璃的透明度提高,發(fā)光強(qiáng)度先上升,隨后下降,發(fā)光波長(zhǎng)發(fā)生藍(lán)移。綜合比較,我們認(rèn)為最佳熔制溫度為750℃。夜光玻璃的發(fā)光強(qiáng)度隨燒結(jié)時(shí)的保溫時(shí)間有關(guān)。發(fā)光強(qiáng)度隨著保溫時(shí)間的延長(zhǎng)而指數(shù)下降,發(fā)光峰位也發(fā)生。進(jìn)行了樣品的環(huán)境穩(wěn)定性測(cè)試,發(fā)現(xiàn)相同的暴露環(huán)境下,不同放置時(shí)間下,長(zhǎng)余輝夜光玻璃的性能幾乎沒(méi)有變化,而粉體材料發(fā)光性能下降明顯。
[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，

本文編號(hào)：2353750