|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||106/52 ; 106/54 ; 106/DIG ; 8|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 5 인용 특허 : 0|
This invention relates to the use of AlF3 as an opacifying agent in an opal glass making batch which contains 40 wt. percent or more of container and sheet glass cullett. The batch consists essentially, in weight percent, of 40-85% cullett, 0-25% Na2B4O7.5H2O, 0-12% CaMg(CO3)2, 3-19% SiO2, and an amount of Alf3, which is 10-30% of the weight of the cullett.
A glass making batch for the production of a spontaneous opal glass containing essentially, in weight percent, of: 40-85% of a cullett which, in weight percent, contains about 72% SiO2, 13% Na2O, 12% CaO, and 3% metal oxide selected from the group consisting of aluminum oxides, iron oxides and mixtures thereof; 3-19% SiO2; and an amount of AlF3 which is 10-30% of the weight of the cullett.