Method for doping polycrystalline alumina ceramics

Method for doping polycrystalline alumina ceramics

  • CN 101,157,545 A
  • Filed: 09/26/2007
  • Published: 04/09/2008
  • Est. Priority Date: 09/26/2007
  • Status: Active Application
First Claim
Patent Images

1. adulterated method in polycrystalline alumina ceramic may further comprise the steps:

  • A) will carry out after the alumina product moulding earlier just burning, temperature is at 900 ℃



    1250 ℃

    , 1~

    2 hour time;

    B) put together heating but directly do not contact of the alumina product that then moulding was just burnt and impurity to be added, 800 ℃



    1500 ℃

    of Heating temperatures, 2~

    5 hours time, impurity is heated becomes steam, be covered with equably on alumina product;

    C) will carry out high fever for the third time with the alumina product of impurity at last, 1700 ℃



    2000 ℃

    of temperature, 10~

    12 hours time.

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