Fig. 2: Agitation-based particle self-stabilization model of phosphor-glass composites.
From: Rapid synthesis of phosphor-glass composites in seconds based on particle self-stabilization
a Potential energy diagram of YAG:Ce particles self-stabilization. Wbarrier is the interfacial energy barrier between tellurite glass and YAG:Ce particle; Wthermal is the thermal energy; WvdW (min) is the van der Waals potential for maximum attraction between two YAG:Ce particles. Segment 1 is attributed to van der Waals interaction potential energy, which induces particle aggregation; segment 2 is dominated by the interfacial energy barrier, which resists the contact of YAG:Ce particles in glass melt; segment 3 is the interfacial energy barrier descent owing to the tellurite glass-YAG:Ce interface being replaced by YAG:Ce interface. The inset is the wetting angle photograph between tellurite glass melt and YAG:Ce ceramics. b Schematic diagram of uniform dispersion and self-stabilization of YAG:Ce particles in tellurite glass melt. The YAG:Ce particles were poured into the low-viscosity and high surface energy tellurite glass melt. The glass melt quickly wrapped the surface of the YAG:Ce particles and formed new interface with high energy barrier, which prevented YAG:Ce particles from contact and sintering based on the self-stabilization model of YAG particles. c Time-dependent fluent simulation of YAG particles dispersed in tellurite glass melt (at different stages of 0, 1, 3 and 5 s) under the agitation speed of 5 revolutions per second (rev s−1), and the color depth of the particle represents the velocity at that moment. Images used courtesy of ANSYS, Inc.
