Chemistry

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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.

  • Chemistry -

    I, III and IIII?

  • Chemistry -

    I, III and IV is wrong ;)

  • Chemistry -

    the correct is/are ?

  • Chemistry -

    Which one is/are the possible ways?

  • Chemistry -

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

  • Chemistry -

    2 and 4

  • Chemistry -

    Are u sure about 4?

  • Chemistry -

    2 an 4 are correct

  • Chemistry -

    Thank you Anonima

  • Chemistry -

    2 and 4 is right

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

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