@article{oai:nitech.repo.nii.ac.jp:00004134, author = {宇野, 智子 and 春日, 敏宏 and 中山, 伸}, issue = {1159}, journal = {Journal of the Ceramic Society of Japan}, month = {Mar}, note = {Fine mica crystals (1-2μm) were precipitated by reheating glasses in the system Ba_<0.5>Mg_3 (Si_3AlO_<10>) F_2-Mg_2Al_4Si_5O_<18>-Ca_3 (PO_4)_2. This glass-ceramics were two times stronger (?350 MPa in bending) than conventional mica-containing glass-ceramics. The glass-ceramics contained two types of mica crystals, i. e., calcium-rich type and barium-rich type. MgF_2 in the glass compositions was effective to increase the content of the barium-mica crystal. It was found that barium-rich mica crystal effectively deflected cracks to improve mechanical strength, and that calcium-rich mica crystal generated the ease of machining., application/pdf}, pages = {315--319}, title = {バリウム雲母を析出させた結晶化ガラスの機械的性質}, volume = {100}, year = {1992}, yomi = {カスガ, トシヒロ} }