毕业论文移动版

摘要本文重点研究烧结助剂——氧化镁对钆镓铝石榴石（Ce: GGAG）闪烁陶瓷的光学性能和显微结构的影响。本文通过固相烧结制备Ce:GGAG闪烁陶瓷，并对其进行表征，采用阿基米德排水法原理测量材料的密度；采用X-射线衍射仪(XRD)进行材料的物相分析；材料的微观结构和尺寸大小用扫描电子显微镜(SEM)进行检测；材料的透过率使用分光计测量。通过表征得到，随着MgO添加剂含量的增加，陶瓷致密化程度随之降低，而随着烧结温度的升高陶瓷致密化程度逐渐提高，当烧结温度大于1550oC时陶瓷基本达到致密化。在1550oC时，随着MgO添加剂含量的增多，陶瓷样品的透过率先升高后降低，当MgO的掺杂浓度在0.02wt%时，陶瓷的透过率最高。50829

该论文有图16幅，参考文献15篇。

毕业论文关键词：GGAG  闪烁体  烧结助剂  透过率  致密化

Effects of Sintering Additives on the Microstructure And Optical Performance of Ce:GGAG Scintillation Ceramics

Abstract

This article focuses on the influences effects of sintering aidditives, magnesium oxide, on the optical properties and the microstructure of Ce:GGAG scintillation ceramics. Ce:GGAG scintillator ceramics were prepares by solid-state sintering. The densities of materials were measured by Archimedes drainage method. The phase of materials were confirmed by XRD measurement. The microstructure and grain size of materials were measured by SEM. And the transmittance of the samples were measured by UV-Vis-NIR spectrometer. The characterization shows with increasing the content of MgO, the densification of ceramics decreases and the densification of ceramics increases at the same time. When the sintering temperature reaches more than 1550oC, the ceramic attain basic densification. When the temperature achieve 1550oC, as the additive content of MgO increasing, the transmission of ceramic sample raises firstly, then drops. What’s more, the highest transmission of ceramic sample was achieved, when MgO doping concentration is 0.02wt%. 

Key Words: GGAG  scintillation  Sintering additives  transmittance densification

目 录

摘  要 I

Abstract II

目 录 III

图清单 V

变量注释表 VI

1 绪论 1

1.1 引言 1

1.2 闪烁材料的基本性能 1

1.3闪烁材料的研究进展 3

1.4闪烁陶瓷GGAG 4

1.5以氧化镁为烧结助剂进行制备的例子 5

1.6 选题依据、研究思路与研究内容 5

2 样品的制备 7

2.1实验原料 7

2.2 粉体的制备过程 7

2.3粉体的成型和烧结 8

3 表征和测试 9

3.1测定密度 9

3.2 XRD物相分析 9

3.3 SEM分析 9

3.4 透过率的测试 10

4 Ce:GGAG的性能研究 11

4.1 原料表征 11

4.2烧结温度和致密化的关系 12

4.3 样品的XRD分析结果 (责任编辑：qin)