Elucidation of porous ceramics formation via unidirectional solidification and its application for catalyst support

阐明单向凝固多孔陶瓷的形成及其在催化剂载体中的应用

• 批准号: 18560655
• 负责人: UENO Shunkichi
• 金额: $ 2.52万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560655/
• 关键词: セラミックス多孔体; 一方向凝固; 高次構造制御; ロータス型ポーラスアルミナ; 高配向性; 光学式浮遊帯域溶融法; 酸化物多孔体; 水素ガス溶解度差; 構造制御; 組織制御; 凝固; 粒界ガラス相; 不純物添加

A porous ceramics with cylindrical pores can be fabricated by unidirectional solidification in hydrogen atmosphere. The pore morphologies, such as porosity, pores diameter and distribution of pores can be controlled by the experimental conditions, such as total pressure, hydrogen partial pressure and solidification rate. When silica component was added in feed rod, porous ceramics with high porosity was obtained. When magnesia was added in feed rod, porous ceramics with high porosity was obtained in 1%H_2 atmosphere. A glassy boundary phase was formed in the solidified sample during the unidirectional solidification when silica and calcia were added in feed rod and the compressive property of the sample was improved by the formation of the glassy phase.

在氢气气氛中定向凝固可以制备出具有圆柱形气孔的多孔陶瓷。通过控制总压、氢分压和凝固速率等实验条件，可以控制孔隙率、孔径和分布等孔隙形貌。在料棒中加入二氧化硅组分，可获得高孔隙率的多孔陶瓷。当料棒中加入氧化镁时，在1%H_2气氛中可获得高孔隙率的多孔陶瓷。在定向凝固过程中，加入SiO2和氧化钙，在凝固试样中形成了玻璃相，通过玻璃相的形成改善了试样的压缩性能。

项目成果

Formation of Pore in Silicon by Solidification under a High Static Magnetic Field in Hydrogen-Argon Mixed Gas

氢-氩混合气体中高静磁场凝固硅中孔隙的形成

• 发表时间: 2009
• 作者: S. Ueno;H. Nakajima;H. Kobatake;H. Fukuyama;S. Awaji
• 通讯作者: S. Awaji

Formation Mechanism of Porous Alumina with Oriented Cylindrical Pores Fabricated by Unidirectional Solidification

单向凝固定向柱状孔多孔氧化铝的形成机理

• 发表时间: 2008
• 期刊: Journal of the American Ceramics Society 91
• 作者: S. Ueno;L. M. Lin;H. Nakajima
• 通讯作者: H. Nakajima

Fabrication of Lotus-type Porous Alumina with High Compressive Strength Using Unidirectional Solidification

单向凝固法制备高抗压强度莲花型多孔氧化铝

• 发表时间: 2007
• 作者: L. M. Lin;S. Ueno;H. Nakajima
• 通讯作者: H. Nakajima

High Temperature Internal Friction Behavior of Unidirectionally Solidified Alumina Based Ceramics

单向凝固氧化铝基陶瓷的高温内摩擦行为

• 发表时间: 2009
• 作者: S.Ueno;S.Takata;Y.Tanabe;T.Akatsu;E.Yasuda;Y.Waku
• 通讯作者: Y.Waku

ロータス型ポーラスアルミナの気孔形成に及ぼす添加シリカの影響

添加二氧化硅对莲花型多孔氧化铝成孔的影响

• 发表时间: 2009
• 作者: H. Koizumi;M. Tachibana;K. Kojima;橋本 忍;上野俊吉
• 通讯作者: 上野俊吉