Alumina-zirconia (AZ) composites are attractive structural materials, which combine the high hardness and Young's modulus of the alumina matrix with additional toughening effects, due to the zirconia dispersion. In this study, AZ composites containing different amounts of zirconia (in the range 5-20 vol %) were prepared by a wet chemical method, consisting on the surface coating of alumina powd...

mn doped zno nanocomposite thin film coated on glass by a simple spin-coating method was used to degrade an azo textile dye from aqueous environment. mn doped zno nanocomposite thin film was characterized by means of x-ray diffraction (xrd) and scanning electron microscopy (sem). the photo-reduction activity of photocatalyst was evaluated using an azo textile dye as organic contaminant irradiat...

This paper reports the improvement in the sensing performance of nanocrystalline SnO(2)-based liquid petroleum gas (LPG) sensors by doping with fluorine (F). Un-doped and F-doped tin oxide films were prepared on glass substrates by the dip-coating technique using a layer-by-layer deposition cycle (alternating between dip-coating a thin layer followed by a drying in air after each new layer). Th...

A preparation method is described of monophasic y t t r i a s tab i l ized zirconia doped with Bi203. This material is prepared from a homogeneous power which, a f te r pressing, is sintered in a Bi203 atmosphere. The resu l t ing ceramic has a composition of 0.78Zr02-0.206 YO1.5-O.O14Bi01. 5. The grain boundaries are enriched with bismuth. A re la t i ve density of 95% of the theoret ica l one...

The elastic properties of the individual layers of layered materials can be derived from the resonant frequencies of a set of test specimens comprising samples with different layer configurations [1]. Based on this, a mixed numerical-experimental framework for the identification of the elastic properties of layered materials has been formulated and a number of different identification routines ...

The purpose of this study was to evaluate how ultrasonic cleaning of silica-coated zirconia surfaces would influence the latter's bond strength to resin luting material. Forty zirconia specimens were divided into four groups: one air abrasion group and three silica-coated groups. Silica-coated specimens were cleaned with distilled water using an ultrasonic cleaner after tribochemical silica coa...

BACKGROUND Sandblasting particles which remain on the surfaces of dental restorations are removed prior to cementation. It is probable that adhesive strength between luting material and sandblasting particle remnants might exceed that with restorative material. If that being the case, blasting particles adhere to sandblasted material surface could be instrumental to increasing adhesive strength...

Zirconia has its place in the biomedical industry because of mechanical strength, bio-inertness, and physiochemical properties. was synthesized doped with Terbium (Tb), a lanthanide that reported to show photoluminescence property, which major characteristic for carcinogenic studies. Tb were using co-precipitation technique sintered at temperature ranging from 900 1200 °C. The sample thus studi...

The effects of ceria and zirconia on the structure-function properties of supported rhodium catalysts (1.6 and 4 wt % Rh/γ-Al2O3) during CO exposure are described. Ceria and zirconia are introduced through two preparation methods: 1) ceria is deposited on γ-Al2O3 from [Ce(acac)3] and rhodium metal is subsequently added, and 2) through the controlled surface modification (CSM) technique, which i...

TiO2 prepared by a green aqueous sol–gel peptization process is co-doped with nitrogen and zirconium to improve extend its photoactivity the visible region. Two precursors are used: urea triethylamine; (IV) tert-butoxide added as source of zirconia. The N/Ti molar ratio fixed regardless chosen precursor while quantity zirconia set 0.7, 1.4, 2, or 2.8 mol%. performance physico-chemical propertie...