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Mosaics - PowerPoint PPT Presentation


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Mosaics. Structure of mosaics. Colored tesserae made of glass. What is glass?. Roman Glass raw materials . Quartz (SiO 2 ) Lime CaCO 3 Natron Na 2 CO 3 · 10H 2 O Metal Oxides (properties). Glass raw materials . SiO 2  Network CaCO 3  Stabilizer Na 2 CO 3 · 10H 2 O  Flux.

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roman glass raw materials
Roman Glass raw materials
  • Quartz (SiO2)
  • Lime CaCO3
  • Natron Na2CO3·10H2O
  • Metal Oxides (properties)
glass raw materials
Glass raw materials
  • SiO2 Network
  • CaCO3  Stabilizer
  • Na2CO3·10H2O

 Flux

quartz network
Quartz “network”

http://webmineral.com/data/Quartz.shtml

slide11

SiO2

CaCO3

+

Na2CO3

+ Heat

slide13

Soda-lime

glass

Ca 2+

Na+

slide14

Copper –Cu(I) or metal

Cobalt Co(II)--

Manganese Mn(IV)

Copper--Cu (II)

Tin

Lead-Tin