A series of phase-pure [(Gd_0.6Lu_0.4)_0.99Ce_0.01]₃[Al_1-z(Mg/Si)_z]₅O₁₂ (z = 0-0.10) garnet phosphor powders were prepared via gel-combustion, which were then sintered into ceramics (up to 1550 °C) under atmospheric pressure. Dilatometry revealed that equimole of Mg²⁺/Si⁴⁺ substitution for Al³⁺ accelerates densification and lowers the activation energy for grain boundary diffusion in the intermediate stage of sintering (∼1150–1370 °C), which was assayed to be ∼353 kJ/mol for z = 0 and ∼289 kJ/mol for z = 0.10. The acceleration effects of Mg²⁺/Si⁴⁺ on sintering and grain growth were further demonstrated by the results of ramp and holding sintering. Firing at 1550 °C for 4 h also produced ∼99 % dense ceramics for the Mg²⁺/Si⁴⁺ codoped garnet powders. Through considering crystal splitting of the Ce³⁺ 5d energy level, photon-phonon coupling, and crystal structure/microstructure, the influences of Mg²⁺/Si⁴⁺ content and material form on Ce³⁺ luminescence, including intensity, external/internal quantum efficiencies, emission wavelength, CIE color coordinates and decay time, were clarified in detail.

通过凝胶燃烧制备了一系列相纯[[Gd _0.6 Lu _0.4）_0.99 Ce _0.01 ] ₃ [Al _{1- z}（Mg / Si）_z ] ₅ O ₁₂（z = 0-0.10）石榴石荧光粉，然后在大气压下将其烧结成陶瓷（最高1550°C）。膨胀膨胀法表明，在烧结的中间阶段（〜1150–1370°C），Mg ²⁺ / Si ⁴⁺替代Al ^3+的等摩尔分子加速了致密化并降低了晶界扩散的活化能，据测定其约为353 z的kJ / mol= 0且z = 0.10时约为289 kJ / mol 。Mg ²⁺ / Si ⁴⁺对烧结和晶粒长大的加速作用进一步通过斜纹和保温烧结的结果得到证实。在1550°C下煅烧4 h也可制得〜99％的Mg ²⁺ / Si ⁴⁺共掺杂石榴石粉致密陶瓷。通过考虑Ce ³⁺ 5d能级的晶体分裂，光子-声子耦合以及晶体结构/微观结构，Mg ²⁺ / Si ⁴⁺含量和材料形式对Ce ^3+的影响 详细说明了发光，包括强度，外部/内部量子效率，发射波长，CIE颜色坐标和衰减时间。