COMPLEX SODIUM AND LANTHANUM GERMANATE OF COMPOSITION NaLa(GeO)O AS MIXTURE FOR PRODUCING OPTICALLY TRANSPARENT CERAMICS AND METHOD FOR PRODUCING OPTICALLY TRANSPARENT CERAMICS Russian patent published in 2024 - IPC C04B35/50 C04B35/645 G02B1/00 B82Y40/00 

FIELD: chemistry.

SUBSTANCE: invention relates to production of optically transparent ceramics with apatite structure, which can be used as material for optical lenses, as well as a functional carrier material for optoelectronic and photonics devices, such as lasers and white light-emitting diodes (WLEDs). Nanopowder of complex sodium lanthanum germanate of composition NaLa₉(GeO₄)₆O₂ is used as a mixture for obtaining optically transparent ceramics. Method of producing optically transparent ceramics based on complex sodium lanthanum germanate of composition NaLa₉(GeO₄)₆O₂, involves hot pressing of nanopowder of composition NaLa₉(GeO₄)₆O₂ at pressure of 2-8 GPa, at temperature 600-610 °C for 10-20 minutes with a temperature rise rate of 100-110 °C/min, and then quenching by abrupt reduction of temperature to room temperature. Total light transmission of the obtained transparent ceramic NaLa₉(GeO₄)₆O₂ at wavelength 500 nm (visible spectral range) is 55%, at wave length 1,200 nm (infrared range) – 74%.

EFFECT: wider range of materials used as optically transparent ceramics.

2 cl, 2 dwg, 4 ex