نتایج جستجو برای: zirconium oxide

تعداد نتایج: 180730  

Journal: :Acta chimica Slovenica 2014
Andrea Gomez-Sanchez Maria Katunar Wido Schreiner Gustavo Duffó Silvia Ceré David J Schiffrin

The dielectric properties of electrochemically grown zirconium oxide films by anodisation of zirconium in 1.0 mol dm-3 phosphoric acid solution were investigated in a 3 to 30 V potential range with a view to inducing surface modifications for eventual use in biomedical and electronic applications. The oxide films grown at different potentials were characterised by Atomic Force Microscopy, X-ray...

Journal: :journal of dentistry, tehran university of medical sciences 0
vahideh nazari 1post-graduate student, department of prosthodontics, faculty of dentistry, tehran university of medical sciences, tehran, iran safoura ghodsi assistant professor, dental research center, dentistry research institute, department of prosthodontics, faculty of dentistry, tehran university of medical sciences, tehran, iran. marzieh alikhasi associate professor, dental research center, dentistry research institute, department of prosthodontics, faculty of dentistry, tehran university of medical sciences, tehran, iran. majid sahebi assistant professor, dental research center, department of prosthodontics, faculty of dentistry, tehran university of medical sciences, tehran, iran ahmad reza shamshiri assistant professor, research center for caries prevention, dentistry research institute, department of community oral health, faculty of dentistry, tehran university of medical sciences, tehran, iran

objectives: fracture strength is an important factor influencing the clinical long-term success of implant-supported prostheses especially in high stress situations like excessive crown height space (chs). the purpose of this study was to compare the fracture strength of implant-supported fixed partial dentures (fpds) with excessive crown height, fabricated from three different materials. mater...

Journal: :avicenna journal of dental research 0
z. khamverdi associate professor, dept. of operative dentistry, dental research center, dental faculty, hamadan university of medical sciences, iranسازمان اصلی تایید شده: دانشگاه علوم پزشکی همدان (hamadan university of medical sciences) z. moshiri assistant professor; dep t . of prosthodontics, dental faculty , zanjan university of medical scienceسازمان اصلی تایید شده: دانشگاه علوم پزشکی زنجان (zanjan university of medical sciences)

the interest of dental research in metal-free restorations has been rising in the last 20 years following the introduction of innovative all-ceramic materials in the daily practice. in particular, high-strength ceramics and related cad/cam techniques have widely increased the clinical indications of metal-free restorations, showing more favorable mechanical characteristics compared to the early...

Nano-encapsulated iron oxide in Zirconium oxide-coated mica pigments are thermally stable,innocuous to human health, non-combustible, and they do not conduct electricity. They could beapplied in several industries such as thermoplastics, cosmetics, food packaging, children toys, paints,automobiles coating, security purposes, and banknotes. Nowadays, they are highly desirable inceramic decoratio...

Journal: :journal of dentistry, tehran university of medical sciences 0
hamid jalali faculty of dentistry, tehran university of medical sciences leyla sadighpour associate professor, prosthodontics department, school of dentistry, tehran university of medical sciences ali miri faculty of dentistry, tehran university of medical sciences ahmad reza shamshiri faculty of dentistry, tehran university of medical sciences

objectives : the purpose of this in vitro study was to compare the marginal adaptation and fracture resistance of a zirconia-based all-ceramic restoration with two preparation designs. materials and methods: twenty-four mandibular premolars were randomly divided into two groups (n=12); the conventional group received a peripheral shoulder preparation and the modified group received a buccal sho...

Journal: :international journal of nanoscience and nanotechnology 2012
m. ranjbar m. yousefi m. lahooti a. malekzadeh

in this study, isophthalic acid-zirconium(iv) nanocomposite has been prepared from zirconyl nitrate pentahydrate and potassium iodide, with isophthalic acid, (c8h6o4=benzene-1,3-dicarboxylic acid) as a ligand, via sonochemical method in ethylene glycol and methanol as solvents. the crystalline tetragonal zro2 has been produced by thermal decomposition of isophthalic acid-zirconium(iv) nanocompo...

2015
Yang Jeong Park Jun Mok Ha Ghafar Ali Hyun Jin Kim Yacine Addad Sung Oh Cho

We have presented a mechanism to explain why the resulting oxide morphology becomes a porous or a tubular nanostructure when a zircaloy is electrochemically anodized. A porous zirconium oxide nanostructure is always formed at an initial anodization stage, but the degree of interpore dissolution determines whether the final morphology is nanoporous or nanotubular. The interpore dissolution rate ...

2006
Jorge F. Fernández-Sánchez Rita Cannas Stefan Spichiger Rolf Steiger Ursula E. Spichiger-Keller

Novel nanostructured materials, such as aluminum oxide (AlOOH), silicon oxide (SiO2) or zirconium oxide (ZrO2) embedded into PVA, were investigated as potential matrices to incorporate organometallic compounds (OMCs) for the development of optical oxygen-sensitive sensors which make use of the principle of luminescence quenching.

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