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Mosaics

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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Mosaics

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  1. Mosaics

  2. Structure of mosaics

  3. Colored tesserae made of glass • What is glass?

  4. Roman Glass raw materials • Quartz (SiO2) • Lime CaCO3 • Natron Na2CO3·10H2O • Metal Oxides (properties)

  5. Glass raw materials • SiO2 Network • CaCO3  Stabilizer • Na2CO3·10H2O  Flux

  6. Quartz “network” http://webmineral.com/data/Quartz.shtml

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

  8. SiO2 CaCO3 + Na2CO3 + Heat

  9. Soda-lime glass Ca 2+ Na+

  10. Copper –Cu(I) or metal Cobalt Co(II)-- Manganese Mn(IV) Copper--Cu (II) Tin Lead-Tin

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