Preparation method and application of inorganic gadolinium-based complex crystal

The invention belongs to the technical field of material preparation, and specifically relates to a preparation method and application of an inorganic gadolinium-based complex crystal. The preparationmethod comprises the following steps: firstly uniformly mixing a gadolinium source, oxalic acid urea and water to obtain a mixture; then loading the mixture into a stainless steel high pressure reaction container with a polytetrafluoroethylene reaction still for crystallization to obtain a flaky colorless crystal with good crystallinity; then carrying out deionized water washing and suction filtration in sequence on the obtained crystal, and drying at room temperature to prepare and obtain the inorganic gadolinium-based complex crystal. The preparation method is simple in preparation process,convenient in operation and high in repeatability, the raw materials are easily obtained, the prepared inorganic gadolinium-based complex crystal can be used as a magnetic refrigeration material andis environmentally friendly