In this study, deep-red emitting Mg₂TiO₄:Mn⁴⁺ phosphor ceramics were synthesized by the high temperature solid-state reaction method. The ceramics can be excited by the 465 nm blue light and had a narrow emission with a full width at half maximum (FWMH) value of 31 nm. The peak wavelength was located at 658 nm, which matched the demanded wavelength for photosynthesis. The crystal field strength (D_q) and the Racah parameters (B and C) were estimated by the Tanabe-Sugano diagram. The thermal conductivity of the Mg₂Ti(_0.999)O₄:0.001Mn⁴⁺ ceramic was 7.535 W/(m·K) at room temperature, which was one order of magnitude higher than that of the traditional packaging method using the silicone gel. A set of phosphor converted LEDs were fabricated by mounting the phosphor ceramics onto the 460 nm blue LED chips and the CIE coordinates can move from the blue region to the purple light region with the thickness of the ceramic increasing. These results indicated that the Mg₂TiO₄:Mn⁴⁺ phosphor ceramic was suitable for plant lighting when combined with a blue LED chip.

本研究通过高温固相反应法合成了深红色发射的Mg ₂ TiO ₄：Mn ⁴⁺荧光粉陶瓷。陶瓷可以被465 nm的蓝光激发，并具有狭窄的发射，其半峰全宽（FWMH）值为31 nm。峰值波长位于658 nm，与光合作用所需的波长匹配。通过田边-S野图估计晶体场强度（D _q）和拉卡参数（B和C）。Mg ₂ Ti（_0.999）O ₄：0.001Mn ⁴⁺的热导率陶瓷在室温下为7.535 W /（m·K），比使用硅胶的传统包装方法高一个数量级。通过将荧光粉陶瓷安装到460 nm蓝色LED芯片上，可以制造出一组荧光粉转换的LED，随着陶瓷厚度的增加，CIE坐标可以从蓝色区域移动到紫色区域。这些结果表明，当与蓝色LED芯片结合使用时，Mg ₂ TiO ₄：Mn ⁴⁺磷光体陶瓷适用于植物照明。