The effects of a K2SO4 solution on the surface hardness of gypsum type III

Autor:	B N Permana, S Triaminingsih, D J Indrani
Rok vydání:	2017
Předmět:	History Materials science Gypsum Metallurgy 030206 dentistry engineering.material Hardness Computer Science Applications Education 03 medical and health sciences 0302 clinical medicine Vickers hardness test Setting time engineering 030212 general & internal medicine
Zdroj:	Journal of Physics: Conference Series. 884:012087
ISSN:	1742-6596 1742-6588
DOI:	10.1088/1742-6596/884/1/012087
Popis:	Gypsum type III is commonly used for working models and as a tool for restorations or dentures manufacturing in the laboratory. K2SO4 solution is recommended to be added to gypsum type III because it can accelerate the setting time. The aim of this study was to identify the effects of a K2SO4 solution on the surface hardness of gypsum type III. The surface hardness was tested using a Vickers Hardness Tester with a load of 500 gf. The results were analyzed using a one-way ANOVA. The surface hardness of gypsum type III manipulated using a 1.5% K2SO4 solution was higher than the surface hardness of gypsum type III manipulated without K2SO4 but lower than the surface hardness of gypsum type IV. Therefore, the use of a 1.5% K2SO4 solution can increase the hardness of gypsum type III but not enough to make it equivalent to the surface hardness of gypsum type IV.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ac18ae779464ba6bd0c5e837276b021a https://doi.org/10.1088/1742-6596/884/1/012087 Zobrazit plný text záznamu