公开(公告)号：JP2001302261A

公开(公告)日：2001-10-31

申请号：JP2000116669

申请日：2000-04-18

Applicant: AKITA PREFECTURE

Inventor： KATAGIRI SHINOBU

IPC: C03B19/00 ,  C03B19/08 ,  C03C11/00

Abstract: PROBLEM TO BE SOLVED: To provide a lightweight expanded glass tile in order to effectively reuse a used glass, and to provide a method for producing a lightweight expanded glass tile having merits of free foaming and foamed shape having sharp corners and flat surfaces as conventional tiles. SOLUTION: This lightweight expanded glass tile is obtained by mixing pulverized glass coarse particles having 50 μm average particle diameter with fine particles having 14 μm average particle diameter at a weight ratio of (35:5) to (25:15) preferably (30:10), using 1.0-2.0 wt.% preferably 1.5 wt.% calcium carbonate as the foaming agent based on the glass powder weight, kneading the resultant with 15 wt.% water then molding at 40 kg/cm2 pressure and heating and calcinating at 750-800 deg.C for 30 min to similarly expand the molded product to the shape thereof in molding.