A Study on Non-Equilibrium Phase diagrams for Glass Forming Oxide Systems

玻璃形成氧化物体系非平衡相图的研究

• 批准号: 05452299
• 负责人: MORINAGA Kenji
• 金额: $ 4.16万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05452299/
• 关键词: TTT diagram; glass; aluminosilicate; Bi-superconductor; phase transformtion; crystallization; microstructure; oxide; アノ-サイト; セルシアン; 結晶相

CCT(Continuous Cooling Transformation), CHT(Continuous Heating Transformation ) and TTT(Time Temperature Transformation) phase diagrams, which have been established in steel-making processes, are also need for glass-ceramic processings. The non-equilibrium phase diagrams for the crystallization of aluminosilicate glasses and the solidification of Bi-based superconductor melt are proposed. The mu-to alpha-condierite transformation is observed during the isothermal treatments of glasses with compositions of 2MgO・2Al_2O_3・5SiO_2 and MgO・Al_2O_3・2SiO_2. SEM observation suggests that the mu-to alpha-transformation is similar to the isothermal martensite formation. In RO・Al_2O_3・2SiO_2 glasses (R=Ca, Sr, Ba), the formation period of the metastable phases are related to the cation radii affecting their diffusions during the metastable-to stable-phase transformations, e. g., hexagonal-to monoclinic-celsians transformations. The highest-Tc superconductor phase Bi_2Sr_2Ca_2Cu_3O_x (2223) is formed through the isothermal treatment at 850ﾟC for above 150 ks. The analyzes of XRD and scanning electron micrograph (SEM) with energy dispersive X-ray (EDX) suggest that Bi_2Sr_2CuO_x (2201) needles are crystallized at the interface between (Ca, Sr) _2CuO_3 crystals amd melt, and the part of 2201 crystals transforms to Bi_2Sr_2CaCu_2O_x (2212) and 2223 crystals by the diffusions of Ca, Sr, and Cu ions.

在炼钢过程中建立的CCT（连续冷却转变）、CHT（连续加热转变）和TTT（时间温度转变）相图也是微晶玻璃加工所需要的。提出了铝硅酸盐玻璃晶化和铋基超导体熔体凝固的非平衡相图。2 MgO·2Al_2O_3·5SiO_2和MgO·Al_2O_3·2SiO_2玻璃在等温处理过程中，均观察到了由μ型向α型的转变。扫描电镜观察表明，μ-α-转变类似于等温马氏体形成。在RO·Al_2O_3·2SiO_2（R=Ca，Sr，Ba）玻璃中，亚稳相的形成时间与从亚稳相到稳定相转变过程中影响其扩散的阳离子半径有关。例如，在一个实施例中，六方到单斜-玻色子变换。在850 ℃等温处理150 ks以上，形成了最高Tc的超导相Bi_2Sr_2Ca_2Cu_3O_x（2223）。X射线衍射（XRD）和扫描电子显微镜（SEM）的分析表明，Bi_2Sr_2CuO_x（2201）针状晶体是在（Ca，Sr）_2CuO_3晶体与熔体的界面处结晶的，部分2201晶体通过Ca、Sr和Cu离子的扩散转变为Bi_2Sr_2CaCu_2O_x（2212）和2223晶体。

项目成果

浅山 英一、武部 博倫、森永 健次: "コーディエライトガラスの加熱過程における相変態" 日本金属学会誌. 58. 720-727 (1994)

Eiichi Asayama、Hirotomo Takebe、Kenji Morinaga：“堇青石玻璃加热过程中的相变”日本金属学会杂志 58. 720-727 (1994)。

Katsuhiro Kumadaki, Eiichi Asayama, Hiromichi Takebe and Kenji Morinaga: ""Formation of Superconductor Phases in the Solidification of Bi-Pb-Sr-Ca-Cu-O Melt"" Journal of the Mining and Materials Processing Institute of Japan. 110. 701-705 (1994)

Katsuhiro Kumadaki、Eiichi Asayama、Hiromichi Takebe 和 Kenji Morinaga：“Bi-Pb-Sr-Ca-Cu-O 熔体凝固中超导相的形成”，日本采矿与材料加工研究所杂志。

Eiichi Asayama, Hiromichi Takebe and Kenji Morinaga: ""Phase transformation of Cordierite Glass in Heating Process"" Journal of Japan Institute of Metals. 58. 720-727 (1994)

Eiichi Asayama、Hiromichi Takebe 和 Kenji Morinaga：““堇青石玻璃在加热过程中的相变””日本金属学会杂志。

熊懐克浩、浅山英一、武部博倫、森永健次: "Bi-Pb-Sr-Ca-Cu-O系融体の凝固過程における超伝導相の生成" 資源・素材学会誌 資源と素材. 5. (1994)

Katsuhiro Kumagai、Eiichi Asayama、Hirotomo Takebe、Kenji Morinaga：“Bi-Pb-Sr-Ca-Cu-O 系熔体凝固过程中超导相的生成”日本资源材料学会杂志、资源与材料。 5.（1994）

熊懐克浩、浅山英一、武部博倫、森永健次: "Bi-Pb-Sr-Ca-Cu-O系融体の凝固過程における超伝導相の生成" 資源と素材(資源・素材学会誌). 110. 701-705 (1994)

Katsuhiro Kumagai、Eiichi Asayama、Hirotomo Takebe、Kenji Morinaga：“Bi-Pb-Sr-Ca-Cu-O系熔体凝固过程中超导相的生成”资源与材料（日本资源与材料学会会刊） 110.701-705（1994）