Nippon Electric Glass Co., Ltd.

Tomoko Enomoto

Naoki Fujita

Shinsaku Nishida

Nobutoshi Ito

Hiroyuki Okamura

A glass article contains: in mol %, more than 0% to 70% of LaO, 0% to 80% of BO, 0% to 40% of SiO, 0% to 80% of BO+AlO+SiO, 0% to 85% of GdO+GaO+YO+YbO+ZrO+TiO+NbO+TaO+WO, 0% to 15% of MgO+CaO+SrO+BaO, 0% to 35% of ZnO, and more than 0% to 5% of CuO.

Glass article

A glass material less likely to cause inconveniences, such as crystallization and the generation of devitrified matters, while holding desired optical properties, has a refractive index of 1.8 or more and a content of AlOof over 0 to 500 mass ppm.

Glass material

Provided is a manufacturing method for a refractory filler, comprising melting a raw material batch and cooling the resultant melt to precipitate willemite as a main crystal phase.

Growing community of inventors

Otsu, Japan

Tomoko Enomoto