毕业论文

打赏
当前位置: 毕业论文 > 材料科学 >

具有蓝绿复合特性荧光粉材料的研制与性能研究

时间:2017-06-22 14:03来源:毕业论文
摘要BaMgAl10O17(BAM)是一种优良的发光基质,其化学稳定性好、发光效率高,具有成为多功能材料的优越条件。本论文实验部分以BAM为基质,通过掺杂Eu和Mn来实现蓝绿双功能复合特性,并利

摘要BaMgAl10O17(BAM)是一种优良的发光基质,其化学稳定性好、发光效率高,具有成为多功能材料的优越条件。本论文实验部分以BAM为基质,通过掺杂Eu和Mn来实现蓝绿双功能复合特性,并利用XRD、SEM、FL来研究其晶相结构、形貌和发光性能。结果表明,利用溶液燃烧合成法能在600℃形成物相良好的BAM,合成温度比传统的高温固相法降低了700℃,并利用燃烧反应使其自身产生的还原气氛对Eu3+进行了还原,从而避免了固相法中的反复高温还原的步骤,节约了能源,降低了成本。Mn、Dy、Sr、Ca的掺入对BAM:Eu2+光谱实现有效的裁剪控制,且燃烧法制备的荧光粉产物颗粒分散均匀,易于涂覆。10537
关键词:蓝绿荧光粉;溶液燃烧合成;发光性能
Abstract
BaMgAl10O17 (BAM) is an excellent luminescent substrate with high chemical stability, high luminous efficiency, which makes it outstanding multifunctional material. In this article, Eu and Mn were co-doped in the BAM to acquire the phosphor with blue and green luminescence. Typically, a series of measurement including XRD, SEM and FL were employed to investigate the microstructure, morphology and luminescent property of the as-prepared phosphor. The result indicated that BAM phase was well shaped by solution combustion synthesis at 600℃, which was about 700℃ lower than that with conventional high temperature solid-state reaction. Furthermore, the Eu3 + in the crystal lattice could reduce Eu3 + automatically during the combustion process, which was facile to cause the energy decrease and the cost lower. Furthermore, Mn, Dy, Sr and Ca elements were co-doped into BAM to obtain the significant and effective tailoring spectra. Moreover, the phosphor power fabricated by solution combustion synthesis was well homodispersed, which were facile to be coated. 源`自*六)维[论*文'网www.lwfree.cn
KeyWords:Blue-green phosphor;Solution Combustion Synthesis;Spectrum Characteristic
 目  录
1    绪论    1
1.1    引言    1
1.2    LED灯用荧光粉的发展现状    1
1.3    白光LED用荧光粉的性质    3
1.4    白光LED国内外研究现状及发展前景    3
1.5    荧光材料的分类    4
1.5.1    铝酸盐系列荧光材料    4
1.5.2    硅酸盐系列荧光材料    5
1.5.3    氮化物/氮氧化物系列荧光材料    5
1.5.4    含硫荧光材料    5
1.5.5    其他荧光材料    5
1.6    荧光粉的分类    6
1.6.1    红色荧光粉    6
1.6.2    绿色荧光粉    6
1.6.3    蓝色荧光粉    7
1.7    稀土荧光粉    7
1.7.1    稀土电子管用荧光粉    7
1.7.2    稀土三基色照明用荧光粉    7
1.8    荧光粉的制备方法    8
1.8.1    高温固相反应法    8
1.8.2    燃烧法    8
1.8.3    溶胶-凝胶法    9
1.9    荧光粉发光机理    10
1.10    选题思路    12

源`自*六)维[论*文'网www.lwfree.cn


1.10.1    荧光粉末的选择    12
1.10.2    粉末制备的选择    12
1.10.3    具体流程思路    12
2    实验部分    13
2.1    实验药品    13 具有蓝绿复合特性荧光粉材料的研制与性能研究 :http://www.lwfree.cn/cailiao/20170622/9629.html
------分隔线----------------------------
推荐内容