Development of Si-N Based Ceramic Membranes

Development of Nondestructive Evaluation Methods for Ceramic Coatings and Membranes

Nondestructive evaluation (NDE) methods are being developed for thermal barrier coatings (TBCs) and for gas-separation membranes. For TBC applications, current NDE development is focused on infrared thermal imaging methods. Compared with optical and other methods, thermal imaging is quantitative so can be used to characterize TBCs during their entire life cycle, from as-processed condition to s...

The N-Membranes Problem

Ceramic Membranes and Thin Films High-Temperature Catalyst Supports and Ceramic Membranes: Metastability and Particle Packing

Parameters and/or processes responsible for the stability of catalyst supports and ceramic membranes are discussed. Two major parameters/processes were identified which are responsible for the stabiliv of sol-gel derived nanostmctured oxides at elevated temperatures. They are metastable-to-stable phase transformation and structure and packing of primary particles within the aggregate. Based on ...

Characteristics of Photoelectrochemical Cells Based on n/n-Si and p/n-Si Photoanodes Modified by Metal Films

Photoelectrochemical cells (PECs), composed of different epitaxial n-Si photoanodes coated with evaporated metal film of Ni, Pt, Ni/Pt and immersed in solution with redox couple Br2 /Br or Fe(NC)g~7Fe(CN)£~ were investigated. The open circuit photovoltage and short circuit current density of these PECs under optimum conditions by illuminating with a bromine-tungsten lamp (65 mW/cm), are 0.494 V...

Ceramic Membranes in Hybrid Photocatalysis/ultrafiltration Processes

Division of Physical Chemistry, Institute of Advanced Materials, Physicochemical Processes, Nanotechnology and Microsystems (IAMPPNM), NCSR Demokritos, 15310 Aghia Paraskevi, Attikis, Athens, Greece LCM – Laboratory of Catalysis and Materials – Associate Laboratory LSRE/LCM, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal Grupo de Fotocatálisis y ...