The results showed, that the chemicalhomogeneity and activity of the powder depended on the types of raw material, catalysts and the calcination conditions.
结果表明：原料种类、催化剂、干燥及预烧条件，是影响复合氧化物超细粉均匀性和活性的主要因素。
2
The results indicated that the samples fabricated by wet -chemical method or by longer sintering time had better homogeneity and showed bulk superconductivity.
结果表明，延长烧结时间或用湿化学法制得的粉末制备样品，其均匀性好，仅表现出体的超导电性。
3
At present, the domestic supply of the agriculture chemical is far greater than its demand, and the homogeneity of the products is serious, and the market competition is fierce.