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Statements

Subject Item
n2:RIV%2F60461373%3A22310%2F13%3A43895895%21RIV14-GA0-22310___
rdf:type
skos:Concept n4:Vysledek
dcterms:description
Powder compacts have been prepared from ceramic and pharmaceutical powders (alumina, kaolin-mullite mixtures, hydroxyapatite, ibuprofenum) by uniaxial pressing with different starch types (rice, corn, potato) and with a commercial cellulose product (blend of microcrystalline cellulose and sodium carbomethylcellulose). Powders and compacts have been studied by optical and / or scanning elecron microscopy, and after pressing or firing the compacts have been studied using density measurements and diametral compression (Brazilian tests). Systematic experimental work is presented, dealing with the uniaxial die pressing of ceramic powder systems (alumina, mullite, kaolin-mullite-based ceramics, hydroxyapatite) and one selected pharmaceutical powder (ibuprofenum). The influence of applied pressure, additive type and additive content on the bulk density of the ceramics after pressing or firing has been studied, and for ibuprofenum and kaolin-mullite compacts also the strength after pressing is reported. It is shown that cellulose blends and rice starch are useful pressing additives for ceramics, while corn starch can be recommended only with reservations and potato starch seems not to be suitable, unless other modifications are introduced. Based on a detailed Weibull analysis, it is shown that pressed compacts of anisometric pharmaceutical powders like ibuprofenum exhibit a remarkably high strength (significantly higher than kaolin compacts) and might possibly be used to increase the green strength of ceramic compacts. Powder compacts have been prepared from ceramic and pharmaceutical powders (alumina, kaolin-mullite mixtures, hydroxyapatite, ibuprofenum) by uniaxial pressing with different starch types (rice, corn, potato) and with a commercial cellulose product (blend of microcrystalline cellulose and sodium carbomethylcellulose). Powders and compacts have been studied by optical and / or scanning elecron microscopy, and after pressing or firing the compacts have been studied using density measurements and diametral compression (Brazilian tests). Systematic experimental work is presented, dealing with the uniaxial die pressing of ceramic powder systems (alumina, mullite, kaolin-mullite-based ceramics, hydroxyapatite) and one selected pharmaceutical powder (ibuprofenum). The influence of applied pressure, additive type and additive content on the bulk density of the ceramics after pressing or firing has been studied, and for ibuprofenum and kaolin-mullite compacts also the strength after pressing is reported. It is shown that cellulose blends and rice starch are useful pressing additives for ceramics, while corn starch can be recommended only with reservations and potato starch seems not to be suitable, unless other modifications are introduced. Based on a detailed Weibull analysis, it is shown that pressed compacts of anisometric pharmaceutical powders like ibuprofenum exhibit a remarkably high strength (significantly higher than kaolin compacts) and might possibly be used to increase the green strength of ceramic compacts.
dcterms:title
PREPARATION AND CHARACTERIZATION OF CERAMIC AND PHARMACEUTICAL POWDER COMPACTS WITH POLYSACCHARIDES AS PRESSING ADDITIVES AND PORE FORMERS PREPARATION AND CHARACTERIZATION OF CERAMIC AND PHARMACEUTICAL POWDER COMPACTS WITH POLYSACCHARIDES AS PRESSING ADDITIVES AND PORE FORMERS
skos:prefLabel
PREPARATION AND CHARACTERIZATION OF CERAMIC AND PHARMACEUTICAL POWDER COMPACTS WITH POLYSACCHARIDES AS PRESSING ADDITIVES AND PORE FORMERS PREPARATION AND CHARACTERIZATION OF CERAMIC AND PHARMACEUTICAL POWDER COMPACTS WITH POLYSACCHARIDES AS PRESSING ADDITIVES AND PORE FORMERS
skos:notation
RIV/60461373:22310/13:43895895!RIV14-GA0-22310___
n4:predkladatel
n5:orjk%3A22310
n3:aktivita
n9:P
n3:aktivity
P(GAP108/12/1170)
n3:dodaniDat
n15:2014
n3:domaciTvurceVysledku
n11:5301823 n11:8986738 n11:5282608 n11:5259886 n11:8742499
n3:druhVysledku
n21:D
n3:duvernostUdaju
n14:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
98945
n3:idVysledku
RIV/60461373:22310/13:43895895
n3:jazykVysledku
n20:eng
n3:klicovaSlova
Weibull statistics; diametral compression (Brazilian tests); optical microscopy; scanning electron microscopy (SEM); cellulose; starch (potato, corn, rice); uniaxial pressing; hydroxyapatite; mullite; kaolin; Alumina
n3:klicoveSlovo
n8:diametral%20compression%20%28Brazilian%20tests%29 n8:cellulose n8:mullite n8:Weibull%20statistics n8:rice%29 n8:optical%20microscopy n8:corn n8:uniaxial%20pressing n8:scanning%20electron%20microscopy%20%28SEM%29 n8:kaolin n8:Alumina n8:hydroxyapatite n8:starch%20%28potato
n3:kontrolniKodProRIV
[777E3160BA29]
n3:mistoKonaniAkce
Prague
n3:mistoVydani
Praha
n3:nazevZdroje
Proceedings of the 9th International Conference on Polysaccharides-Glycoscience
n3:obor
n18:JH
n3:pocetDomacichTvurcuVysledku
5
n3:pocetTvurcuVysledku
5
n3:projekt
n10:GAP108%2F12%2F1170
n3:rokUplatneniVysledku
n15:2013
n3:tvurceVysledku
Zemenová, Petra Gregorová, Eva Veselý, Martin Andelová, Zuzana Pabst, Willi
n3:typAkce
n22:EUR
n3:zahajeniAkce
2013-11-06+01:00
s:numberOfPages
6
n13:hasPublisher
Czech chemical society
n12:isbn
978-80-86238-58-6
n7:organizacniJednotka
22310