Lead-free crown glass

Lead-free crown glass

  • CN 1,186,051 A
  • Filed: 12/05/1997
  • Published: 07/01/1998
  • Est. Priority Date: 12/06/1996
  • Status: Abandoned Application
First Claim
Patent Images

1. refractive index n dBe 1.49-1.54, Abbe number v dBe the lead-free crown glass of 55-62, it is characterized in that following composition (based on the weight % of oxide compound):

  • SiO 2??????????65-75 B 2O 3?????????0-8 Na 2O??????????0-12 K 2O???????????0-25 ∑

    Na 2O+K 2O???12-25 CaO????????????0-<

    5ZnO????????????3-15TiO 2??????????0-<

    1 ZrO 2If 0-3 is suitable, finings is a constant.

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