The technique of powder preheating and explosive sintering was used to prepare single phase nano-ceramic, with the raw material of α-A12O3 powder with grain size about 40nm. SEM, XRD were used to determine the microstructure of sintered samples. Recent progress indicated that, the single phase nano-ceramics of aluminium oxide with 96%～100% theoretical density and grain size less than 100nm were obtained, the grain growth was accelerated along with the increase of powder preheating temperature, the lattice deformation of grains was not evident compared with that explosive sintering technique adopted at room temperature. The nano-ceramic quality and its improing ways were analyzed and discussed.%采用预热粉体爆炸烧结技术制备单相纳米陶瓷，用40nm的α-A12O3粉体作原料进行烧结试验，用高倍扫描电镜、X射线衍射分析等手段对试验结果进行了测试。最近的研究表明：纳米粉体分别经600～800℃预热后进行爆炸烧结，可以得到密度为96％～100％理论密度、晶粒大小在l00nm以下的单相氧化铝纳米陶瓷，随着预热温度的递增，陶瓷晶粒生长有加快趋势。与常温下爆炸烧结相比，本研究的陶瓷晶粒无明显晶格变形。对陶瓷质量的影响因素及其改善途径也进行了分析。
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