About: Molekularly-limited fractal surface area of powders

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Specific surface area (SSA) of powders can be determined using a fractal geometry by the relation SSA xA DxV -3s(2 - D), where xA is the particle size with average surface area and the xV the particle size with average volume. Such relation respects nano, micro or macro irregularities on the surface. Within this theory the fractal dimension D 3 and scale parameter s (equals to the linear dimension of an interacting adsorbate molecule) play a significant role. The parameter D may be determined from BET or dissolution measurements on several samples changing the powder particle sizes or sizes of adsorbate molecules. To reach good accuracy of the SSA value, one must know the fractal dimension D very precisely. Standard uncertainty of this parameter on the level 0.02 contributes to the total standard uncertainty of the SSA value within 30%. In the end of the paper, a new equation for SSA, depending on term (2 - D) (s2 - sBET) /sBET, where sBET and s2 are effective cross sectional diameters for BET and new adsorbates, was derived. The presented equations have good application potential. Specific surface area (SSA) of powders can be determined using a fractal geometry by the relation SSA xA DxV -3s(2 - D), where xA is the particle size with average surface area and the xV the particle size with average volume. Such relation respects nano, micro or macro irregularities on the surface. Within this theory the fractal dimension D 3 and scale parameter s (equals to the linear dimension of an interacting adsorbate molecule) play a significant role. The parameter D may be determined from BET or dissolution measurements on several samples changing the powder particle sizes or sizes of adsorbate molecules. To reach good accuracy of the SSA value, one must know the fractal dimension D very precisely. Standard uncertainty of this parameter on the level 0.02 contributes to the total standard uncertainty of the SSA value within 30%. In the end of the paper, a new equation for SSA, depending on term (2 - D) (s2 - sBET) /sBET, where sBET and s2 are effective cross sectional diameters for BET and new adsorbates, was derived. The presented equations have good application potential. (en)
Title	Molekularly-limited fractal surface area of powders Molekularly-limited fractal surface area of powders (en)
skos:prefLabel	Molekularly-limited fractal surface area of powders Molekularly-limited fractal surface area of powders (en)
skos:notation	RIV/61989100:27640/13:86088351!RIV14-MSM-27640___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(ED1.1.00/02.0070), P(EE.2.3.20.0074)
http://linked.open...iv/cisloPeriodika	9
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Pištora, Jaromír
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola báňská - Technická univerzita Ostrava / Centrum nanotechnologií
http://linked.open...dnocenehoVysledku	89336
http://linked.open...ai/riv/idVysledku	RIV/61989100:27640/13:86088351
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	specific surface area, fractal dimension, adsorption, mineral powder (en)
http://linked.open.../riv/klicoveSlovo	specific surface area adsorption mineral powder fractal dimension
http://linked.open...odStatuVydavatele	GL - Grónsko
http://linked.open...ontrolniKodProRIV	[A376AF63D54D]
http://linked.open...i/riv/nazevZdroje	Jökull journal
http://linked.open...in/vavai/riv/obor	BH
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	IT4Innovations Centre of Excellence Nanotechnology - the basis for international cooperation
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	63
http://linked.open...iv/tvurceVysledku	Jandačka, Petr Pištora, Jaromír
issn	0449-0576
number of pages	13 (xsd:int)
http://localhost/t...ganizacniJednotka	27640

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