【摘要】 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．更多还原

【Abstract】 β-Al₂O₃ powdered material could be prepared from the mixtures of Li₂CO₃, Na₂CO₃ and AL₂O₃, which were obtained by dry mixing, wet mix-screening or spray-drying process, by stepped calculating without grinding. The effect of preparation condition on the properties of the powdered material was showed. The powder composed of β/β"-Al₂O₃ in principle, f（β^"）>70%, could be fabricated into solid electrolytic coating for metal pipeline in atmosphere, with some binders and solvents. The powder in the coating wus stable chemically and electrochemically to metal, binders and moistur. The polarization behavior of cathode for "Beta-coating" showed that there was a flat at the polarization curve, which could be evajuated for the cathode protection of metal in atmosphere.更多还原