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Publikācija: Characterization of Porous Ceramic Pellets from Latvian Clays

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Publikācijas valoda English (en)
Nosaukums oriģinālvalodā Characterization of Porous Ceramic Pellets from Latvian Clays
Pētniecības nozare 2. Inženierzinātnes un tehnoloģijas
Pētniecības apakšnozare 2.4. Ķīmijas inženierzinātne
Autori Līga Dabare
Ruta Švinka
Atslēgas vārdi porous pellets, illitic clay, porosity, sorption
Anotācija Ceramic pellets from four different Latvian clay deposits were produced. Investigated clays have different compositions but the main clay mineral in those is illite. Pellets were shaped from plastic paste and sintered in four different temperatures – 700, 800, 900, and 1 050 °C. For each type of pellets characteristics and properties were studied. Mineral composition of these pellets varies depending on raw clay composition and sintering temperature. Calcareous clay ceramics contain anorthite, diopside, and calcium hydroxide, which elevates pH value of water after immersion of pellets. Non-calcareous clay ceramics contain spinel and hematite. Porosity and specific surface area are highly dependent on sintering temperature. Lower temperature presents higher porosity (15–25%) and specific surface area (up to 30 m2/g). Addition of sawdust elevates the porosity but diminishes the specific surface area through increasing sintering temperatures. The highest adsorption characteristics for all investigated ceramic pellets are shown towards iodine molecules (12.7 mg/g). Chromate and ammonia ions adsorption rates are much lower than iodine.
Hipersaite: http://www.lmaleidykla.lt/publ/0235-7216/2014/2/82-88.pdf 
Atsauce Dabare, L., Švinka, R. Characterization of Porous Ceramic Pellets from Latvian Clays. Chemija, 2014, Vol.25, No.2, 82.-88.lpp. ISSN 0235-7216.
ID 19909