Author/Authors :
Santos، نويسنده , , Murilo F.M. and Fujiwara، نويسنده , , Eric and de Paula، نويسنده , , Francine D. and Suzuki، نويسنده , , Carlos K.، نويسنده ,
Title Of Article :
Opacity measurements on quartz and its influence on silica glass properties
Latin Abstract :
The aim of this work was to study opacity variation throughout Brazilian production of rocky quartz fragments and analyze the impact of opacity on fused silica glass properties, more specifically bubble formation and size. To accomplish that, 32 samples were collected and their opacities were evaluated by measuring the light absorption coefficient of each sample. 10 of those samples were then flame fused and the size of formed bubbles was measured on the glass using a microscope. The bubble size measurements were compared with those of commercial powders fused by the same method. Results show that significant variations in opacity exist in the production process and better quality control is required in order to meet international standards. Regarding bubble formation, samples with light absorption coefficient lower than 150 cm2/kg can generate glasses with bubble size close to those observed on glasses made using commercial powders.
NaturalLanguageKeyword :
Quartz glass , opacity , Fusion test , Silica glass , quartz
JournalTitle :
Studia Iranica
