In this study, yttrium aluminium garnet (YAG) specimens in which yttrium was partially substituted by lanthanum Y_3-xLa_xAl₅O₁₂ (YLaAG) were prepared by an aqueous sol-gel method. YLaAG samples were analyzed by X-ray diffraction (XRD), solid state nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR) methods. The presence of Ce³⁺ ions as an impurity originating from starting material was determined, therefore, luminescence measurements of YLaAG samples were also recorded. It was demonstrated that luminescent properties are strongly dependent on the phase composition of synthesized species. The XRD analysis results showed that only low substitution of yttrium by lanthanum is possible in Y_3-xLa_xAl₅O₁₂ without destroying garnet crystal structure. It was also demonstrated, that solid state NMR and EPR methods are indispensable tools for the explanation of processes and properties observed in the newly synthesized Y_3-xLa_xAl₅O₁₂ compounds.

在这项研究中，通过水溶胶-凝胶法制备了钇被钇Y _3-x La _x Al ₅ O ₁₂（YLaAG）部分取代的钇铝石榴石（YAG）样品。通过X射线衍射（XRD），固态核磁共振（NMR）和电子顺磁共振（EPR）方法分析了YLaAG样品。确定了作为起始原料的杂质存在的Ce ³⁺离子的存在，因此，还记录了YLaAG样品的发光测量值。已经证明，发光性质强烈取决于合成物质的相组成。XRD分析结果表明，Y中钇仅可能被镧低取代_3-x La _x Al ₅ O _12，而不会破坏石榴石的晶体结构。还表明，固态NMR和EPR方法是解释在新合成的Y _3-x La _x Al ₅ O ₁₂化合物中观察到的过程和性质的必不可少的工具。