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Glass crystallization making red phosphor for high-power warm white lighting

机译:玻璃结晶制作高功率暖白色照明的红磷光体

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摘要

a Schematic illustration for the entropy of glass, stable crystal, super-cooled liquid, and stable liquid as a function of temperature. Tg, Tx, and Tsm are the glass transition temperature, crystallization onset temperature, and the melting temperature of stable crystal, respectively. The inset illustrates free energy evolution of the system as glass crystallization proceeds. ΔGv means Gibbs free energy difference between metastable glass and stable crystal, and Ea represents activated energy that needs to be overcome upon glass crystallization. b MgO–Al2O3–SiO2 phase diagram, showing the PG composition in wt%. c DSC curve of PG recorded at a heating rate of 10 K/min. d XRD patterns of PG and the crystallized composite. e Schematic illustration of the two-dimensional structure of amorphous aluminosilicate glass network. f PL spectra of PG and the crystallized Mg2Al4Si5O18:Eu2+ composite under 350 nm UV excitation, and PLE of PG measured by monitoring 450 nm emission, the inset photograph shows the PG taken under UV light irradiation
机译:作为温度函数的玻璃,稳定晶体,超冷液体和稳定液体的熵的示意图。 TG,TX和TSM是玻璃化转变温度,结晶起始温度和稳定晶体的熔化温度。插图说明了系统的自由能量进化,因为玻璃结晶进行。 ΔGV意指悬浮玻璃和稳定晶体之间的Gibbs自由能量差,EA表示需要在玻璃结晶时克服的活性能量。 B Mg​​O-Al2O3-SiO2相图,显示为WT%的PG组合物。 CSC的PG曲线以10k / min的加热速率记录。 PG的D XRD图谱和结晶复合材料。 e非晶铝硅酸盐玻璃网络二维结构的示意图。 PG的F PL光谱和结晶Mg2Al4SI18:Eu2 +复合材料下350nm UV激发,并通过监测450nm发射测量的PG的PLE,插图照片显示在紫外光照射下采取的PG

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