Open AccessDevelopment of Imitation Black Spinel from Coconut Shell Ash as a Glass Modifier
Author(s) -
Yinda Sangsawat,
N. Srisittipokakun,
J. Kaewkhao
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2013/1/012026
Subject(s) - spinel , materials science , opacity , mineralogy , nuclear chemistry , metallurgy , chemistry , physics , optics
The aims of this research, Study the effect of using ashes from coconut shell ash as a Glass Modifier in glass composition to develop of imitation black spinel. From the analysis of main components of coconut shell ash, both before and after burning. It was found that before burning, coconut shell ash has main element is K 2 O SiO 2 and CaO. In proportion equal to 60.83, 14.64 and 14.11 (wt%) and also found that the elements of the additives that affect the color including MnO, Fe 2 O 3 and CuO. After sintering at a temperature of 400, 600, 800 and 1,000 °C. Found that quantity K 2 O and CaO has decreased proportion. On the other hand, SiO 2 has increase proportion. Then Use the ashes from the burnt coconut shell ash as a chemical replace K 2 O in glass formula (45-x)B 2 O 3 : 20SiO 2 : 15Bi 2 O 3 : 20K 2 O: xCoO (where x was 8, 10, 12, 14 and 16 mol%). Found that the glass is opaque. The density of the glass was between 4.1338 ± 0.0004 and 4.1587 ± 0.0019 g/cm 3 , which is greater than the density of black spinel. Glass had a hardness value of 6.5 Mohs scale which is comparable to the felspar, but it is less than the hardness of the real black spinel, which is 7.5 Mohs scale.