Influence of ZrO 2 /Al 2 O 3 Ratio in Carrier on Performance of Pt/ZrO 2 -Al 2 O 3 Catalyst

Ternary System Al 2 O 3 – MgO – CaO : Part II , Phase Relationships in the Subsystem Al 2 O 3 – MgAl 2 O 4 – CaAl 4 O 7

Solid-state compatibility and melting relationships in the subsystem Al2O3–MgAl2O4–CaAl4O7 were studied by firing and quenching selected samples located in the isopletal section (CaOzMgO)–Al2O3. The samples then were examined using X-ray diffractomtery, optical microscopy, and scanning and transmission electron microscopies with wavelengthand energy-dispersive spectroscopies, respectively. The ...

Upconversion spectroscopy of Al 2 O 3 : Er 3 +

The spectroscopic properties of Al2O3:Er thin films have been investigated by lifetime measurements. The luminescence decay curves show an initial non-exponential component, followed by an exponential tail, whose decay time decreases with increasing Er concentration. This behavior can be described with good accuracy by a microscopic treatment that takes into account both energy migration and en...

Uniformity of Al 2 O 3 - 2 rO 2 Composites by Colloidal Filtration

Dispersion states of aqueous composite A1203 /ZrOz colloidal suspensions were studied by measuring particle size distribution as a function of pH. Mutual dispersion was achieved at p H values of 2.0 to 3.5. Consolidated composites formed by colloidal filtration reflected the uniformity of the colloidal state. The mean flexural strength (896 MPa) of the sintered compacts was 1.6 times that of bo...

Electrodeposited Co – Ni – Al O composite coatings 2 3

Composite coatings of Co–Ni–Al O were studied by electrolytic codeposition of Co–Ni alloys and Al O from a sulfamate 2 3 2 3 electrolyte containing Al O particles. The influence of plating parameters on the content of the co-deposited Al O particles in 2 3 2 3 Co–Ni alloys was investigated. The maximum value of co-deposited Al O can be achieved at a particle content of 80 g l in y1 2 3 bath, a ...

An Egg-Shell Pd-Ag/ α -Al 2 O 3 Catalyst for Tail-End Acetylene Selective Hydrogenation