Ultrafine alumina powders were prepared by pyrolysis of the aluminium precursor powders obtained by precipitation method using aluminium nitrate and ammonium carbonate as raw materials.
以硝酸铝为原料，碳酸铵为沉淀剂，合成前驱体碳酸铝铵，然后煅烧得到纳米级氧化铝粉体。
Two kinds of methods for the regeneration of magnesium nitrate solution are discussed, which are precipitation method and filter-press method.
讨论了硝酸镁溶液再生时所采用的两种方法：沉降法和压滤法。
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