哥特式电影
University of Science and Technology of China A dissertation for Master’s degree The study of nanostructure of
porous ceramics based on
Nano-CT technology
Author’s Name：Quanwen Wu
Speciality：Nuclear Techniques and Applications哇
Supervisor：Prof. Yangchao Tian
Finished time: May, 2010
中国科学技术大学学位论文原创性和授权使用声明
本人声明所呈交的学位论文，是本人在导师指导下进行研究工作所取得的成果。除已特别加以标注和致谢的地方外，论文中不包含任何他人已经发表或撰写过的研究成果。与我一同工作的同志对本研究所做的贡献均已在论文中作了明确的说明。 本人授权中国科学技术大学拥有学位论文的部分使用权，即：学校有权按有关规定向国家有关部门或机构送交论文的复印件和电子版，允许论文被查阅和借阅，可以将学位论文编入有关数据库进行检索，可以采用影印、缩印或扫描等复制手段保存、汇编学位论文。
保密的学位论文在解密后也遵守此规定。
作者签名：吴问全
2010年5月21日
摘要
摘要
陶瓷中空纤维膜材料体内的多孔结构对其性能影响很大，因此研究陶瓷的多孔结构具有十分重要的意义，不过现有的中空陶瓷表征手段均不能够观察这种孔的三维结构。本实验采用Nano-CT成像技术对相转化制备的陶瓷中空纤维膜的多孔结构进行了三维观察，获得了膜内部孔的形状、孔隙率、孔径分布等重要参数，并大致计算了孔的大小大约为0.4-1.5 m，孔隙率为38.31%，这些重要实验数据可以为改善其制造工艺、优化结构参数提供了基本依据，从而能够使其更好地在化工、能源、环保等多个领域得到更广泛的应用。本工作是在合肥国家同步辐射实验室U7A硬x-射线成像实验站完成的，我们主要开展了以下几个部分的工作： 第一部分：利用Nano-CT技术进行中空陶瓷材料的二维图像的研究，获得了中空纤维膜的表面信息；
第二部分：对YSZ-LSM陶瓷中空纤维壁内形貌进行了无损的三维观察，获得了膜内部孔的形状、孔的走向、孔径分布以及中空纤维膜内部详实的
三维结构，同时计算了孔的大小和孔隙率。利用Nano-CT对
YSZ-LSM进行表征技术可为改善制造工艺、优化结构参数提供准
确数据，制备得到我们所需的微观结构，获得可以广泛应用于化
工、能源、环保等领域所需性能的陶瓷中空纤维；
第三部分：通过反复实验和样品的前期处理，不断提高中空陶瓷纤维膜样品制备方法，以求取得更完善的实验数据。
发酵饲料
ABSTRACT
ABSTRACT五四运动为中国成立做了什么准备
The study of porous structure of ceramic is of significance because it has a great impact on the performance of ceramic. However, the existing characterization techniques are not able to observe the three-dimensional (3D) structure of ceramic. In this paper, Nano-CT imaging technique were used to study the 3D structure of ceramic hollow fiber membrane which obtained by phase inversion. The results showed the shape, direction, size distribution, as well as the 3D map of the pores in side the ceramic. The pore size is about 0.4-1.5 μm, and the porosity is 38.31%. These data can be used to improve their manufacturing processes and optimize the structure parameters, which make it widely used in the chemical, energy, environmental protection and other fields.
The main works in the thesis are described as the following:
廖碧仪Part 1: Using Nano-CT technique for two-dimensional images of hollow ceramic materials research, obtained information on the surface of hollow fiber membrane
皇甫平事件Part 2：In this work, Nano-CT imaging technique was used to study 3D structure of a ceramic fiber tube prepared by a phase inversion technology. The results showed the shape,
direction, size distribution, and 3D map of the pores inside the ceramic wall. The pore
size is 0.4–1.5 μm, with a porosity of 38.31%. The data can be used to improve their
preparation processes and optimize the structure parameters, for applications in
chemical, energy, environmental protection and other fields.
Part 2 ：Through repeated experiments and sample pre-treatment, and constantly improve the ceramic hollow fiber membrane sample preparation methods, in order to obtain better
experimental data.
Keywords:Porous ceramics, Three-dimensional structure, Nano-CT, Porosity，YSZ–LSM
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