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.

通过在氢气气氛中单向凝固可以制备具有圆柱形孔的多孔陶瓷。孔隙形态，如孔隙率、孔径和孔隙分布可以通过实验条件，如总压、氢分压和凝固速率来控制。当喂料棒中添加二氧化硅组分时，可获得高孔隙率的多孔陶瓷。当喂料棒中添加氧化镁时,在1%H_2气氛下得到了高孔隙率的多孔陶瓷。当送料棒中添加二氧化硅和氧化钙时，在单向凝固过程中在凝固样品中形成玻璃态边界相，并且通过玻璃相的形成提高样品的压缩性能。

项目成果

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
• 作者: S. Ueno; L.M. Lin; H. Nakajima
• 通讯作者: H. Nakajima

A new fabrication method of porous ceramics using unidirectional solidification

一种利用单向凝固制备多孔陶瓷的新方法

• 发表时间: 2006
• 作者: S.Ueno; L.M.Lin; H.Nakajima
• 通讯作者: H.Nakajima

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

粒界相析出によるロータス型ポーラスアルミナの圧縮強度改善

晶界相析出提高莲花型多孔氧化铝抗压强度

• 发表时间: 2009
• 作者: 上野俊吉; 林礼明; 中嶋英雄
• 通讯作者: 中嶋英雄

光学式浮遊帯域溶融法によるロータス型ポーラスアルミナの形成に及ぼす凝固速度の影響

凝固速率对光浮区熔法制备莲花状多孔氧化铝的影响

• 发表时间: 2008
• 作者: 上野俊吉