Glass ceramic as a cooktop for induction heating having improved colored display capability and heat shielding, method for producing such a cooktop, and use of such a cooktop

摘要

A glass ceramic as cooktop for induction heating having improved colored display capability and heat shielding is provided. The cooktop includes a transparent, dyed glass ceramic plate having high-quartz mixed crystals as a predominant crystal phase. The glass ceramic contains none of the chemical refining agents arsenic oxide and/or antimony oxide and has a transmittance values greater than 0.4% at at least one wavelength in the blue spectrum between 380 and 500 nm, a transmittance >2% at 630 nm, a transmittance of less than 45% at 1600 nm, and a light transmittance of less than 2.5% in the visible spectrum.

主权项

1. A glass ceramic suitable for use as a cooktop for induction heating having improved colored display capability and heat shielding, comprising:
a transparent, dyed glass ceramic plate having high-quartz mixed crystals as a predominant crystal phase, wherein the glass ceramic plate contains none of the chemical refining agents arsenic oxide or antimony oxide, apart from inevitable traces; transmittance values of the glass ceramic plate of:
>0.4% at at least one wavelength in a blue spectrum between 380 and 500 nm,>2% at 630 nm,<45% at 1600 nm; and a light transmittance in a visible spectrum of less than 2.5%.