ΜΕΛΕΤΗ ΤΗΣ ΕΠΙΔΡΑΣΗΣ ΤΗΣ ΠΑΡΑΣΚΕΥΑΣΤΙΚΗΣ ΔΙΑΔΙΚΑΣΙΑΣ ΣΤΙΣ ΦΥΣΙΚΟΧΗΜΙΚΕΣ ΙΔΙΟΤΗΤΕΣ ΤΩΝ ΦΕΡΡΙΤΩΝ ΤΩΝ ΣΤΟΙΧΕΙΩΝ ΤΗΣ ΣΕΙΡΑΣ ΤΩΝ ΛΑΝΘΑΝΙΔΩΝ. ...

THE EFFECT OF THE PREPARATION PROCEDURE ON THE CHEMICAL AND PHYSICAL PROPERTIESOF ERBIUM FERRITES WAS INVESTIGATED. FOR THE PREPARATION OF THE VARIOUS ERBIUMFERRITES A "WET CHEMICAL" TECHNIQUE WAS EMPLOYED AND MIXED HYDRATED OXIDES OF ERBIUM AND IRON WITH VARIOUS (G.AR.ER) (G.AT.FE) RATIOS WERE FIRED AT A DESIGNATED, VARYING EACH TIME, TEMPERATURE. THE EFFECT OF THE PREPARATION CONDITIONS ON THE GARNET AND PEROVSKITE PHASES PRESENT IN THE SAMPLES AND ON THE PHYSICAL AND CHEMICAL PROPERTIES WAS INVESTIGATED BY THERMAL ANALYSIS, EXAMINATION OF THESAMPLES BY X-RAY AND MOSSBAUER SPECTRA AND MAGNETIC SUSCEPTIBILITY MEASUREMENTS. SPECIAL ATTENTION WAS GIVEN TO THE STUDY OF THEIR CATALYTIC PROPERTIES AND THE REACTION CHOSEN WAS THE THERMAL DECOMPOSITION OF POTASSIUM AND SODIUM CHLORATES AND PERCHLORATES. IT WAS FOUND THAT THE PREPARATION PROCEDURE CRUCIALLY AFFECTS THE GARNET AND PEROVSKITE PHASES FORMED AS WELL AS THEIR CHEMICAL AND PHYSICAL PROPERTIES. THE MAGNETIC SUSCEPTIBILITY AND CATALYTIC ACTIVITY ARE CONSIDERABLY AFFECTED BY THE FIRING TEMPERATURE USED AND BY THE STARTING RATIO OF ERBIUM AND IRON OXIDES. SUGGESTIONS FOR FURTHER WORK ON THE EFFECTS OF PREPARATION OF FERRITES OF THE RARE EARTH ELEMENTS IS ALSO GIVEN.

Grantor dc:publisher

Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)

Year dc:date

1987

Author dc:creator

• Χαραλάμπους, Αικατερίνη-Ιωάννα

• ERBIUM GARNET
• ERBIUM IRON OXIDE
• ERBIUM ORTHOFERRITE
• PREPARATION PROCEDURE OF ERBIUM FERRITES
• RARE EARTH FERRITES
• Rare earth garnets
• RARE EARTH PEROVSKITES
• ΙΔΙΟΤΗΤΕΣ
• ΚΑΤΑΛΥΤΙΚΗ ΔΡΑΣΗ
• ΜΑΓΝΗΤΙΚΕΣ ΚΑΙ ΗΛΕΚΤΡΙΚΕΣ ΙΔΙΟΤΗΤΕΣ
• ΟΡΘΟΦΕΡΡΙΤΕΣ
• ΠΑΡΑΣΚΕΥΑΣΤΙΚΗ ΔΙΑΔΙΚΑΣΙΑ ΤΩΝ ΦΕΡΡΙΤΩΝ
• ΠΑΡΑΣΚΕΥΗ
• ΦΕΡΡΙΤΕΣ ΔΟΜΗΣ ΓΡΑΝΑΤΗ
• ΦΕΡΡΙΤΕΣ ΕΡΒΙΟΥ
• Engineering and Technology
• Chemical Engineering
• Επιστήμες Μηχανικού και Τεχνολογία
• Επιστήμη Χημικού Μηχανικού

Language dc:language

gre

Identifier

10.12681/eadd/0613

OAI identifier oai:identifier

oai:10442/0613