Ordered mesoporous SiO 2 CaOP 2 O 5 bioactive glass with a highly specific surface area has been synthesized through a solgel process in the presence of a nonionic triblock copolymer acting as a template. The amorphous silicate can be detected on the mesoporous SiO 2 CaOP 2 O 5 bioactive glass. The mesoporous SiO 2 CaOP 2 O 5 bioactive glass exhibits the type IV isotherm curve with average pore size of 5.3 nm and high specific surface area of 317.24 m 2

The Sm-doping YBCO films, Y 1−x Sm x Ba 2 -Cu 3 O y and Y 1 Sm x Ba 2−x Cu 3 O y (x = 0.1, 0.3), were fabricated on LAO (00l) single-crystal substrates by TFA-MOD process in order to improve the superconducting properties of YBCO films. The XRD analyses indicated that these samples have a strong c-axis texture, but the secondary phase of BaCuO 2 are found from Y 1 Sm x Ba 2−x Cu 3 O y films with Sm 3+ substitution on Ba 2+ sites. High quality surface, better in-plane and out-of-plane texture of the Sm-doping films have been obtained compared with that of the undoped YBCO film. The Y 0.9 Sm 0.1 Ba 2 Cu 3 O y films showed the highest value of T c and J c in self-field. Superconducting properties of all Sm-doping films are better than those of the pure film. These results strongly suggest that Smsubstitution on Y or Ba sites of YBCO phase is a powerful method to efficiently improve J c and introduce artificial pinning centers in YBCO films.

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Epitaxial films of rare-earth zirconates, RE2Zr2O7 (RE = La, Nd, Sm and Gd) were grown on yttrium stabilized zirconia (100) single crystal substrates using metal-organic deposition. A precursor solution of 0.25 '0.40 M concentration of total cations was spin-coated on yttrium stabilized zirconia substrates and crystallized at 1 000 8C for 3 h in Ar-4%H2 after calcination at 500 8C for 1 h. X-ray diffraction studies showed that the resulting pyrochlore RE2Zr2O7 films were highly textured with cube-on-cube epitaxy. Atomic force microscopy investigations revealed that the surfaces of La2Zr2O7, Nd2Zr2O7 and Sm2Zr2O7 films had a fairly dense and smooth microstructure without cracks and porosity, but that voids could be seen on the surface of the Gd2Zr2O7 film. Optical microscopy measurements confirmed that the Gd2Zr2O7 precursor solution showed poor wetting behavior on the substrate. It was concluded that the Nd2Zr2O7 and Sm2Zr2O7 films could be potentially used as buffer layers for YBa2Cu3O7-d coated conductors.