@article{oai:ir.kagoshima-u.ac.jp:00010700,
 author = {島田, 欣二 and SHIMADA, Kinji and 福重, 安雄 and FUKUSHIGE, Yasuo and 留守, 成人 and RUSU, Shigeto and 室屋, 道子 and MUROYA, Michiko},
 journal = {鹿児島大学工学部研究報告, The research reports of the Faculty of Engineering, Kagoshima University},
 month = {Sep},
 note = {Shirasu volcanic glass (shorten as SVG) separated from the original Shirasu obtained in southern Kyushu has a fixed chemical composition and contains about 75% SiO_2 by weight.
In this paper, SVG was assumed to be a component and the glass-forming region in the system SVG-CaO-MgO was investigated by quenching the melts produced at 1400~1500°C into cold water. The obtained SVG-CaO-MgO glass crystallized above 900°C. The crystal phases precipitated in the heat-treated SVG-CaO-MgO glass at 1100°C for 1 h were akermanite, diopside and forsterite.
Physical, optical, chemical and thermal properties and bending strength of the glasses were investigated. Results are as follows : apparent density 2.67~2.76g/cm^<3>, bending strength 539~882kg/cm^<2>, hardness (D.P.H) 613~713kg/mm^<2>, refractive index 1.578~1.622 ± 0.003, thermal expansion co-efficient (room temperature~700°C) 5.9~9.3×10^<-6>/°C. The glasses showed high resistance to alkaline solution, namely the mean weight loss of the glasses which had been treated by 2N-NaOH solution at 100°C for 14 h was so small as to be 0.7%.},
 pages = {113--121},
 title = {シラスの工業的利用に関する研究（第17報） : シラスガラス－カルシア－マグネシア系ガラスの結晶化},
 volume = {23},
 year = {1981}
}