Qualitative Modellvorstellungen über die Pyrokohlenstoffabscheidung im Fließbett - Ergebnisse eines Strömungsrohrversuches -

A simple spouting fluidized bed was made by placing an open pipe (coatingtube) concentrically within the usual conical fluidized bed chamber. In addition, the hydrocarbon was injected through a smaller concentric pipe into the lower portion of the coatingtube. The chosen hydrocarbon concentration and temperature resulted in the deposition of the usual isotropic coating on the particles. At the same time columnar pyrocarbon deposited on the inside of the coatingtube, while soot deposited on the outside. Laminar pyrocarbon deposited on the hydrocarbon injector. Based on these observations, a qualitative model was developmed, in which the normal conical fluidized bed contains different coexisting deposition zones. With the help of this model it is possible to interpret the different coatingstructures produced by various coating conditions

Ceramic/metal nanocomposites by lyophilization: Processing and HRTEM study

5 páginas, 8 figuras, 1 tabla.-- El pdf del artículo es el manuscrito de autor.This work describes a wet-processing route based on spray-freezing and subsequent lyophilization designed to obtain nanostructured ceramic/metal powders. Starting from the ceramic powder and the corresponding metal salt, a water-based suspension is sprayed on liquid nitrogen. The frozen powders are subsequently freeze-dried, calcined and reduced. The material was analyzed using X-ray diffraction analysis at all stages. High resolution transmission electron microscopy studies showed a uniform distribution of metal nanoparticles on the ceramic grain surfaces, good interfaces and high crystallinity, with an average metal particle size in the nanometric range.This work was supported by the Spanish Ministry of Science and Innovation (MICINN) under the project MAT2009-14542-C02 and the Government of the Principality of Asturias through PCTI and ERDF (European Regional Development Fund) 2007-2013 under project PC10-65. C.F. Gutierrez- Gonzalez acknowledges CSIC and ESF for the concession of a JAE-Doc 2009 grant. S. Agouram thanks the Spanish Ministry of Science and European Social Fund for financial support.Peer reviewe

Реалізація цифрової системи автоматичного керування безперервним об'єктом, на основі фізичної моделі теплового об'єкта з використанням scada системи ZENON

У статті наведена методика поетапної реалізації системи цифрового керування безперервним об'єктом, реалізованої на персональному комп'ютері, що дозволила максимально наблизити модель до реальної системи керування й виконати ефективне тестування її функціонування в невиробничих умовах