Grant-in-Aid for Scientific Research (B)

科学研究补助金 (B)

• 批准号: 07455265
• 负责人: ABE Yoshihiro
• 金额: $ 3.2万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455265/
• 关键词: Porous material; Glass-ceramic; Phosphates; NASICON; Ion exchange; Bacteriostatic property; Catalyst; Titanium Phosphate

Microporous glass-ceramics utilizing spinodal-type phase separation in glass have great advantages over porous ceramics prepared by conventional powder-sintering methods. They have wellcontrolled continuous pores and may be obtained in a desired shape and dimension. This processing is relatively simple and crystalline phases with active function can also be precipitated as the skeleton of the porous materials. Porous glass-ceramics with a skeleton of LiTi_2 (PO_4) _3 show excellent cation exchange properties that Li^+ ions in glass-ceramics are selectively exchanged with Ag^+ ions. In the present work, porous glass-ceramics with the surface phase consisting of predominantly of AgTi_2 (PO_4) _3 crystal and the interior phase of LiTi_2 (PO_4) _3 crystal were prepared by exchange of Ag^+ ions for Li^+ ions. Exchanged Ag^+ ions were chemically stable in water. Silver-containing titanium phosphate crystalline phase in the glass-ceramics did not deteriorated even by heating at 900 ﾟC.The gla … More ss-ceramics showed excellent bacteriostatic properties. Next, novel porous glass-ceramics with a skeleton of CuTi_2 (PO_4) _3 or CuTi_4 (PO_4) _6 were prepared by controlled crystallization of a glass and subsequent chemical leaching of the resulting dense glass-ceramic. A volume-crystallized dense glass-ceramic composed of CuTi_2 (PO_4) _3 and Cu_3 (PO_4) _2 whose surface was covered by a CuO thin layr was prepared by reheating a glass with a nominal composition in the pseudo-binary system CuTi_4 (PO_4) _6 -Cu_3 (PO_4) _2 in air. When the resultant glass-ceramic was leached with dilute H_2SO_4, Cu_3 (PO_4) _2 and CuO phases were dissolved out selectively, leaving a crystalline CuTi_2 (PO_4) _3 skeleton. On the other hand, the HCl-leaching of the same mother glass-ceramic left a crystalline CuTi_4 (PO_4) _6 skeleton. Their specific surface areas of the porous glass-ceramics were 50-70 m^2/g. The porous glass-ceramics showed much higher activity in the conversion reaction of propene into acrolein or 2-propanol into aceton than the catalysts obtained by a conventional sintering of powdery materials. Less

与传统粉末烧结方法制备的多孔陶瓷相比，利用玻璃中旋节线型相分离的微孔玻璃陶瓷具有很大的优势。它们具有良好控制的连续孔并且可以获得所需的形状和尺寸。该工艺相对简单，并且还可以析出具有活性功能的晶相作为多孔材料的骨架。以LiTi_2(PO_4)_3为骨架的多孔微晶玻璃表现出优异的阳离子交换性能，微晶玻璃中的Li^+离子可以选择性地与Ag^+离子进行交换。本工作通过Ag^+离子与Li^+离子的交换制备了表面相主要由AgTi_2(PO_4)_3晶体组成、内相主要由LiTi_2(PO_4)_3晶体组成的多孔微晶玻璃。交换的 Ag^+ 离子在水中化学稳定。即使在900℃下加热，微晶玻璃中的含银磷酸钛晶相也不会变质。微晶玻璃显示出优异的抑菌性能。接下来，通过玻璃的受控结晶和随后对所得致密微晶玻璃的化学浸出，制备了具有CuTi_2(PO_4)_3或CuTi_4(PO_4)_6骨架的新型多孔微晶玻璃。通过在空气中对准二元系CuTi_4(PO_4)_6-Cu_3(PO_4)_2标称组成的玻璃进行再加热，制备了表面覆盖有CuO薄层的CuTi_2(PO_4)_3和Cu_3(PO_4)_2组成的体晶致密微晶玻璃。当用稀H_2SO_4浸出所得微晶玻璃时，Cu_3(PO_4)_2和CuO相选择性地溶出，留下结晶CuTi_2(PO_4)_3骨架。另一方面，同一母体玻璃陶瓷经HCl浸出后留下了结晶CuTi_4(PO_4)_6骨架。多孔微晶玻璃的比表面积为50-70 m^2/g。与通过粉末材料的常规烧结获得的催化剂相比，多孔玻璃陶瓷在丙烯转化为丙烯醛或2-丙醇转化为丙酮的反应中表现出更高的活性。较少的

项目成果

Y.Abe et al.: "Development of porous glass-ceramics in Ag-titanium phosphates and its antibacterial effects" Proc.8th Inter.Symp.Ceramics in Medicine (Bioceramics 8). 247-251

Y.Abe 等人：“Ag-钛磷酸盐中多孔玻璃陶瓷的开发及其抗菌作用”Proc.8th Inter.Symp.Ceramics in Medicine (Bioceramics 8)。

T.kasuga, et al.: "Porous glass-ceramics with bacteriostatic properties in silver-containing titanium phosphates : Control of release amount of silver ions from the glass-ceramics into aqueous solution" J.Am.Ceram.Soc.80 (In press). (1997)

T.kasuga 等人：“含银磷酸钛中具有抑菌性能的多孔玻璃陶瓷：控制玻璃陶瓷中银离子释放到水溶液中的量”J.Am.Ceram.Soc.80（In

K.Yamamoto他: "Preparation of porous glass-ceramics with a skeleton of NASICON-type copper titanium phosphate crystal" Phosphorous Res. Bull. (Proc. 2nd Inter. Symp. Inorganic Phosphate Materials). 6 (印刷中). (1997)

K. Yamamoto 等人：“具有 NASICON 型磷酸铜钛晶体骨架的多孔玻璃陶瓷的制备”Phosphorous Res Bull。（Proc. 2nd Inter. Symp. Inorganic Phosphate Materials）。 (1997)

K.Yamamoto, et al.: "Preparation of porous glass-ceramics with a skeleton of NASICON-type crystal CuTi_2 (PO_4) _3" J.Am.Ceram.Soc.80 (In press). (1997)

K.Yamamoto 等人：“具有 NASICON 型晶体 CuTi_2 (PO_4) _3 骨架的多孔玻璃陶瓷的制备”J.Am.Ceram.Soc.80（印刷中）。

K.Yamamoto 他: "Preparation of porous glass-ceramics with a skeleton of NASICON-type crystal CuTi_2(PO_4)_3" J.Am.Ceram.Soc.80(印刷中). (1997)

K. Yamamoto 等人：“具有 NASICON 型晶体 CuTi_2(PO_4)_3 骨架的多孔玻璃陶瓷的制备”J.Am.Ceram.Soc.80（出版中）。