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研究了β－Ａｌ_２Ｏ_３粉体材料的制备工艺与性质，这种粉体材料可以采用慢速升温、分 阶段保温的工艺，煅烧Ｌｉ_２ＣＯ_３、Ｎａ_２ＣＯ_３和Ａｌ_２Ｏ_３的均匀混合物不经球磨直接制得．根据使用要求与生产条件，混合物可用干混、半湿混－过筛或喷雾干燥法来制备．粉体材料主要由β／β~＂－Ａｌ_２Ｏ_３组成，β~＂相的相对含量＞７０％，加入适当的粘结剂与溶剂，可将其制成大气环境 中金属管道外的固体电解质涂层．涂层中粉体的化学与电化学性能稳定，其阴极极化曲线有明显的平坦区，可用于阴极保护技术．
The preparation process and properties of β-Al 2 O 3 powder materials were studied. The powder materials could be slowly heated and staged. The uniform mixture of calcined Li 2 CO 3, Na 2 CO 3 and Al 2 O 3 was prepared directly without ball milling. Depending on the application requirements and production conditions, the mixture can be prepared by dry-blending, semi-wet-sieving or spray-drying. The powder material is mainly composed of β / β ~ "-Al_2O_3 and the relative content of β ~ phase is> 70%. Adding proper binder and solvent, it can be made into the solid electrolyte coating outside the metal pipe in atmospheric environment . Powder coating in the chemical and electrochemical properties of stability, the cathode polarization curve obvious flat area, can be used for cathodic protection.