VARIATION OF MORPHOLOGIES OF MgAl_2O_4 SPINEL BY THE PROCESSING WITH STARTING POWDERS OF DIFFERENT PHYSICAL NATURE

不同物性起始粉加工对MgAl_2O_4尖晶石形貌的影响

• 批准号: 08455407
• 负责人: NURISHI Yukio
• 金额: $ 4.42万
• 依托单位: GIFU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08455407/
• 关键词: Solid State Reaction; Spinel; Defect; Oxygen Vacancy; Processing; Powder Reaction; Icicle-like Spinel; Densification; 微細構造

In spinel formation reaction, the Wagner model is well known to form spinel layers grown to alumina side and magnesia side in the volume ratio 3 to 1, where the counter diffusion of divalant and trivalant cations governs the reaction instead of the forbidden transport of oxygen. In this project, the spinels formed in fine alumina bed according to the model of the agglomerates reaction of fine powders, the densification of the former spinel around MgO/spinel interface in fine alumina-fine MgO powder system, and the icicle-like spinel in fine alumina-coarse MgO powder system. These three types of spinel would be formed according to the mechanism being concerned with oxygen transport to be different from the Wagner model.

在尖晶石形成反应中，瓦格纳模型众所周知，以体积比 3 比 1 形成生长到氧化铝侧和氧化镁侧的尖晶石层，其中二价和三价阳离子的反扩散控制反应，而不是氧的禁止传输。在本项目中，尖晶石根据细粉团聚反应模型在细氧化铝床中形成，细氧化铝-细MgO粉体系中的前尖晶石在MgO/尖晶石界面周围致密化，并且在细粉体系中形成冰柱状尖晶石。细氧化铝-粗MgO粉体体系。这三种类型的尖晶石将根据与瓦格纳模型不同的与氧传输有关的机制来形成。

项目成果

T.Kuwabara, A.Matsumoto, O.Sakurada, M.Hashiba, Y.Nurishi, J.Requena and J.Moya: "Microstructure of an Icicke-like Spinel Grown at the MgO/MgAl_2O_4 Interface in the Dense and Coarse MgO-Fine Al_2O_3 Powder System" Ceram.Trans.71. 269-282 (1996)

T.Kuwabara、A.Matsumoto、O.Sakurada、M.Hashiba、Y.Nurishi、J.Requena 和 J.Moya：“在致密和粗粒 MgO 中 MgO/MgAl_2O_4 界面处生长的 Icicke 状尖晶石的微观结构

T.Kume et.al: "Ionic Transport to produce diverse morphologies in MgAl_2O_4 formation started from powders of varied physical nature" Ceramic Microstructure ; Control at the atomic level ed.by P.A.Tomsia et al plenum Press. 577-588 (1998)

T.Kume 等人：“从不同物理性质的粉末开始，在 MgAl_2O_4 形成中产生不同形态的离子传输”陶瓷微观结构；

S.Obata et al.: "Slip Casting of Basic Agueous SiC Slurry Containing styrene/Maleic Copolymer." Key.Eng.Mater.159-160. 157-162 (1999)

S.Obata 等人：“含有苯乙烯/马来酸共聚物的碱性水性 SiC 浆料的注浆成型”。

M.Hashiba: "Microstructure of ZnAl_2O_4 Formation from Coarse and Dense Al_2O_3 and Granular ZnO in the Presence of Lif" Solid State Ionics. 101-103. 1007-1014 (1997)

M.Hashiba：“在 Lif 存在下由粗密 Al_2O_3 和粒状 ZnO 形成 ZnAl_2O_4 的微观结构”固态离子学。

T.Kume et: "Ionic Transport to Produce Diverse Morphologies in MgAl_2O_4 Formations Started From Powders of Varied Physical Nature" Proc.Intnl,Symp.on Ceramic Microstructure;Control at the Atomic Level,Ed.by A.P.Tomsia and A.Glaeser,Plenum Press,New York,

T.Kume 等人：“从不同物理性质的粉末开始在 MgAl_2O_4 形成中产生不同形态的离子传输”Proc.Intnl，Symp.on Ceramic Microstruction；原子水平控制，A.P.Tomsia 和 A.Glaeser 编辑，Plenum