【摘要】：采用高溫固相燒結(jié)法制備出結(jié)晶良好的BaTiO3，摻雜稀土Eu對其改性，制得有一定光學(xué)性能的發(fā)光粉體。通過對比實驗發(fā)現(xiàn)Eu最優(yōu)含量，采用熒光光譜儀測試粉體的發(fā)光性能。在實驗設(shè)定的五組對比數(shù)據(jù)中，Eu的含量分別為0.2%，0.4%，0.6%，0.8%和1.0%。發(fā)現(xiàn)隨著Eu含量的增大粉體發(fā)光強(qiáng)度增大，到0.8%時達(dá)到最大，超過0.8%時發(fā)光強(qiáng)度開始下降。這是因為稀土摻雜量很少，當(dāng)超過一定濃度之后會發(fā)生濃度猝滅現(xiàn)象，會降低發(fā)光粉體的發(fā)光強(qiáng)度。在本實驗中，從粉體發(fā)光性能的角度看，，Eu的最佳含量是0.8%。實驗中發(fā)現(xiàn)五組粉體的最高發(fā)射峰均位于695nm，最高激發(fā)峰均位于352nm。 向BaTiO3+3:Eu中引入ZrO2制備BaTi1-xZrxO3:Eu3+發(fā)光粉體。實驗設(shè)定五組對比數(shù)據(jù)，其中ZrO2的含量分別為0，10%，20%，30%，40%。使用熒光光譜儀測試粉體的發(fā)射光譜和激發(fā)光譜，發(fā)現(xiàn)隨著ZrO+2含量的增大粉體的發(fā)光強(qiáng)度下降。純BaTiO3:Eu3的發(fā)光強(qiáng)度最高，BaTi0.6Zr0.4O3:Eu3+的發(fā)光強(qiáng)度最低。五組粉體的最高發(fā)射峰均位于702nm，最高激發(fā)峰均位于351nm。 將制備的BaTi1-xZrxO3:Eu3+發(fā)光粉體壓片成型燒結(jié)成陶瓷，然后被銀檢測其介電常數(shù)。檢測后發(fā)現(xiàn)隨著ZrO2含量的增大樣品的介電常數(shù)減小。五組樣品中，純BaTiO3+3:Eu的介電常數(shù)最大，達(dá)到1710；BaTi30.6Zr0.4O3:Eu+陶瓷的介電常數(shù)最小，為973。 將BaTi1-xZrxO3:Eu3+發(fā)光粉體的發(fā)光強(qiáng)度變化和BaTi1-xZrxO+3:Eu3陶瓷的介電常數(shù)變化聯(lián)系在一起之后發(fā)現(xiàn)，粉體的發(fā)光性能隨著其對應(yīng)陶瓷的介電常數(shù)變化而變化。
[Abstract]:The luminescent powder with good optical properties was prepared by high temperature solid state sintering method, which was modified by BaTiO3, doped rare earth Eu. The optimum content of Eu was found by contrast experiment, and the luminescence property of the powder was tested by fluorescence spectrometer. In the five sets of data, the content of Eu was 0. 2% and 0. 6%, 0. 6% and 1. 0%, respectively. It is found that the luminescence intensity of the powder increases with the increase of Eu content, reaches the maximum at 0.8 and begins to decrease when the content of Eu exceeds 0.8. This is because the rare earth doping amount is very small, when the concentration exceeds a certain concentration, the concentration quenching phenomenon will occur, which will reduce the luminescence intensity of the luminescent powder. In this experiment, the optimum content of Eu is 0.8% from the point of view of luminescent properties of powder. It was found that the highest emission peaks and excitation peaks of the five groups of powders were both located at 695nmand 352nmrespectively. BaTi1-xZrxO3:Eu3 luminescent powder was prepared by introducing ZrO2 into BaTiO3 3:Eu. Five groups of comparative data were set, of which the content of ZrO2 was 0, 10, 20, 30 and 40, respectively. The emission and excitation spectra of the powder were measured by fluorescence spectrometer. It was found that the luminescence intensity of the powder decreased with the increase of ZrO _ 2 content. The luminescence intensity of pure BaTiO3:Eu3 is the highest, and that of BaTi0.6Zr0.4O3:Eu3 is the lowest. The highest emission peaks and excitation peaks of the five groups of powders are all located at 702nmand 351nmrespectively. The prepared BaTi1-xZrxO3:Eu3 luminescent powder was formed and sintered into ceramics, and then its dielectric constant was measured by silver. It was found that the dielectric constant decreased with the increase of ZrO2 content. The dielectric constant of pure BaTiO3 3:Eu was the highest, and the dielectric constant was the smallest (973) in 1710% BaTi30.6Zr0.4O3: EU ceramics. It is found that the luminescence properties of BaTi1-xZrxO3:Eu3 powders vary with the dielectric constant of BaTi1-xZrxO 3:Eu3 ceramics.
【學(xué)位授予單位】：沈陽工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TQ174.1

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