Fig. 8From: Opaque ancient K2O–PbO–SiO2 glass of the Southern Song Dynasty with fluorite dendrites and its fabricationMicrostructures of the replica samples: a–c refering to Replica 1, 2 &3 cooled within the furnace show an increase in dendrite size as the firing temperature rising from 950℃ to 1050℃; d refering to Replica 4 cooled in the air shows the much smaller nano-size crystalsBack to article page