Broadband near-infrared emission in Cr3+-doped MgO-Al2O3-SiO2 dual-phase glass-ceramics for near-infrared spectroscopy applications

Impacts of substituting magnesium with zinc on crystallization behaviors in an aluminosilicate glass

“…First, the mode of surface crystallization contradicts the basic assumption of the overall crystallization for the JMA theory, which will affect the results of the experiment for the volume fraction crystallized x in eqn (5). Second, the calculation of n was based on Ozawa's relation under non-isothermal conditions, where the crystal growth rate could not remain constant during the non-isothermal heat treatment periods.…”

“…Due to their excellent microwave performances, 1 high mechanical properties, 2 adjustable coefficient of thermal expansion, 3 and possible applications in various novel fields, [4][5][6] for example, electronic packing devices, millimeter-wave dielectrics or hard disk substrates, glass ceramics in the MgO-Al 2 O 3 -SiO 2 system have been extensively studied over the past several decades. To alter the nature of exclusive surface crystallization in the stoichiometric cordierite composition (2MgOÁ2Al 2 O 3 Á 5SiO 2 ), extensive research has focused on nucleating agents, such as TiO 2 , ZrO 2 , CeO 2 , or P 2 O 5 .…”

Crystallization of Na2SrGe6O14:Cr3+,Yb3+ Glass Ceramics Enabling a Watt‐Level Output Power NIR‐I/NIR‐II Lighting Source

“…In contrast, glass ceramics (GCs) containing crystals and glass matrix crystallized from glass precursor without pressure assistance is a novel way to fabricate bulk materials. [28][29][30] Recently, several bulk phosphors manufactured from full crystallization of stoichiometric glass using the aerodynamic levitation method have been reported in garnet, e.g., Y 2 CaAl 4 SiO 12 :Cr 3+ (YCAS:Cr 3+ ), Y 3 Al 5 O 12 (YAG)-Al 2 O 3 :Cr 3+ . [31,32] These garnet bulks also exhibit high Abs/EQE (YCAS:Cr 3+ ≈66.0%/59.5%, (YAG)-Al 2 O 3 :Cr 3+ ≈58.3%/58.3%).…”