【摘要】 采用等速升温和恒温烧结方法，对一次颗粒粒径为１０ｎｍ、团聚强度分别为７６ＭＰａ和２３４ＭＰａ的α－Ａｌ２Ｏ３纳米粉的初期烧结机理进行了研究．结果表明两种纳米粉的初期烧结均受晶界扩散控制．团聚强度为７６ＭＰａ的α－Ａｌ２Ｏ３纳米粉烧结激活能为３２８ｋＪ／ｍｏｌ；而团聚强度为２３４ＭＰａ的纳米粉体烧结激活能为４４５ｋＪ／ｍｏｌ．更多还原

【Abstract】 Sintering mechanism of two kinds of α -Al 2O 3 powder with a primary particle diameter of 10nm and agglomeration strength of 76MPa and 234MPa respectively was investigated by sintering at a constant heating rate and sintering at a constant temperature methods. For both kinds of powder sintering in the initial stage were controlled by grain boundary diffusion. For the α -Al 2O 3 powder with agglomeration strength of 76MPa,activation energy of sintering was determined to be 328kJ/mol, while for the powder with agglomeration strength of 234MPa, the activation energy was 445kJ/mol.更多还原