摘要
目的 :研制合成Al2 O3 nZrO2 纳米复合陶瓷粉体 ,以获得其粉体体系全面而真实的粉体颗粒信息。方法 :采用包裹共沉淀法与湿法球磨相结合的方法合成Al2 O3 nZrO2 纳米复合陶瓷粉体 ,对Al2 O3 nZrO2 纳米复合粉体的颗粒形状 尺寸、粒度分布、晶相组成、化学成分等重要表征进行研究分析。并与GI -Ⅱ型α-Al2 O3及In CeramR Zirconia等两种氧化铝陶瓷粉体的性能进行比较研究 ,结果 :①XRD衍射图剖析结果 ,所研制合成的Al2 O3 nZrO2 纳米复合渗透陶瓷粉体晶相组成为α Al2 O3、t ZrO2 及m ZrO2 ;②Al2 O3 nZrO2 纳米复合渗透陶瓷粉体密度为 4.12g cm3;③粉体粒度分布范围为 0 .0 2～ 3.0 μm之间 ,并且粒径小于 0 .5 μm的超细颗粒的相对体积含量达 2 0 %左右 ;④SEM观察及粒度分布测试结果表明Al2 O3 nZrO2 纳米复合渗透陶瓷粉体的微观形貌较规则 ,纵横比接近 1.2。结论 :所合成Al2 O3 nZrO2 粉体化学组成稳定 ,均质性好 ;粉体粒度级配合理 。
Objective: To investigate the properties of zirconia toughened glass infiltrated nanometer-ceramic composite (Al 2O 3/nZrO 2) . Methods: Zirconia toughened glass infiltrated nanometer-ceramic composite(Al 2O 3/nZrO 2)powder was prepared with combination of chemical co-precipitation method and ball milling. The shape, size, partical distribution, crystal phase and chemical composition were measured and analyzed. Results: (1) The crystal phase composition of the studied nanometer ceramic composite powder was made up with α-Al 2O 3, t-ZrO 2 and m-ZrO 2 examined by XRD?(2) The density of the powder was 4.12 g/cm 3?(3) The particle distribution of the powder ranged 0.02～3.0 μm?(4)Observed with SEM, the particle profile of the powder was regular, the ratio of length and width of the particles was about 1.2. Conclusion: The studied nanometer ceramic composite powder owns good homogeneity, stable chemical composition, reasonable powder-size gradation and may be favourable in the improvement of the packing density of ceramics.
出处
《实用口腔医学杂志》
CAS
CSCD
北大核心
2002年第6期518-521,共4页
Journal of Practical Stomatology
关键词
粉体性能
包裹共沉淀法
纳米复合陶瓷
氧化锆增韧
湿法球磨
Chemical co-precipitation method
Nanometer-ceramic composite
Zirconia transformation toughening
