Chemistry

How could one lower the glass transition temperature of a germate (GeO2) glass? Select all possible ways.
i)Increase the cooling rate.
ii)Decrease the cooling rate.
iii)Add SiO2 to the glass melt.
iv)Add CaO to the glass melt.

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asked by Odesa
  1. I, III and IIII?

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  2. I, III and IV is wrong ;)

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  3. the correct is/are ?

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  4. Which one is/are the possible ways?

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    posted by Paul
  5. tried I and III, its not correct. It can be all, II, III and IIII or somthing else??

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    posted by Jon
  6. 2 and 4

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    posted by lena
  7. Are u sure about 4?

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  8. 2 an 4 are correct

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    posted by Anonima
  9. Thank you Anonima

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    posted by Odesa
  10. 2 and 4 is right

    ii)Decrease the cooling rate.
    iv)Add CaO to the glass melt

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    posted by Paul

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