利用溶胶－凝胶法合成钡钛前驱体，经干燥、焙烧等工艺制备了一系列镧掺杂钛酸钡纳米多晶粉体，利用ＸＲＤ确定物相及原始晶粒尺寸；通过模式识别中非线性映照及逆映照方法以原始晶粒尺寸作为目标值将试样分为３类，并通过分类图对工艺参数进行设计，按设计结果进行实验验证，获得了预期结果的多晶粉体，说明模式识别的应用有利于克服传统“炒菜式”合成方法的盲目性． A series of lanthanum-doped barium titanate nano-polycrystalline powders were prepared by sol-gel method and dried and calcined. The phase and original grain size were determined by XRD. Linear mapping and inverse mapping method are based on the original grain size as the target value of the sample is divided into three categories, and through the classification of the process parameters design, experimental results to verify the design to obtain the desired results of the polycrystalline powder, indicating The application of pattern recognition helps to overcome the blindness of traditional “cooking-style” synthesis methods.