Glass-ceramics (GCs) can effectively remedy heat accumulation of lighting applications induced by high power. During the preparation of traditional devitrified GCs, some active ions are unable to play their roles because they fail to enter the crystal lattice. In this work, a Tm³⁺/Eu²⁺/Eu³⁺ tri-doped fluorosilicate GC with thermal conductivity of 2.69 W m⁻¹ K⁻¹ was prepared for the warm WLED. Through the devitrified process, a fraction of Eu³⁺ ions are self-reduced to Eu²⁺ producing green light in the crystal phase, and residual Eu³⁺ ions, as well as Tm³⁺ ions, produce red and blue light in the glass matrix. Furthermore, the photoluminescence intensity of GC enhances more than 212% as the microcrystal precipitation in glass scatter increases. The obtained warm white light has a low correlated color temperature of 3986 K and high color rendering index of 91 under ultraviolet excitation. It is suggested that this type of GCs has a promising prospect in the high-power WLED field.

微晶玻璃 (GC) 可以有效地弥补由高功率引起的照明应用的热量积累。在传统的反玻璃化气相色谱制备过程中，一些活性离子无法进入晶格而无法发挥作用。在这项工作中，为热 WLED 制备了热导率为 2.69 W m ^-1  K ^-1的 Tm ^{3 +} /Eu ²⁺ /Eu ^{3 +}三掺杂氟硅酸盐 GC 。通过反玻璃化过程，一部分 Eu ³⁺离子自还原为 Eu ²⁺，在晶相中产生绿光，残留的 Eu ³⁺离子以及 Tm ³⁺离子，在玻璃基质中产生红光和蓝光。此外，随着玻璃散射中微晶沉淀的增加，GC 的光致发光强度增强了 212% 以上。获得的暖白光在紫外激发下具有3986 K的低相关色温和91的高显色指数。表明这种类型的GCs在大功率WLED领域具有广阔的前景。