Glass substrate for flat panel displays and method for manufacturing same

Glass substrate for flat panel displays and method for manufacturing same

  • CN 103,429,547 A
  • Filed: 12/26/2012
  • Published: 12/04/2013
  • Est. Priority Date: 12/28/2011
  • Status: Active Application
First Claim
Patent Images

1. a flat panel display glass substrate, with a % by mole expression, it contains:

  • 55~

    80% SiO 2, 8~

    20% Al 2O 3, 0~

    8% B 2O 3, MgO over 0%~

    15%,0~

    20% CaO,0~

    15% SrO,0~

    10% BaO;

    AndSiO 2+ 2 * Al 2O 3Be below 100%;

    Mol ratio B 2O 3/ (SiO 2+ Al 2O 3) be 0~

    0.12;

    Mol ratio MgO/RO is in 0.15~

    0.9 scope, wherein, and the total amount that RO is MgO, CaO, SrO and BaO;

    Devitrification temperature is less than 1280 ℃

    ;

    Heat up with 10 ℃

    /min from normal temperature and keep 2 hours with 550 ℃

    , thereafter, the 10 ℃

    /min of take be cooled to after normal temperature by the percent thermal shrinkage shown in following formula more than 3ppm and be less than 75ppm;

    Percent thermal shrinkage (ppm)={ length of the glass before the shrinkage/thermal treatment of the glass before and after thermal treatment } * 10 6.

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