首页 | 本学科首页   官方微博 | 高级检索  
     检索      


Sinterability of 8Y–ZrO2 powders hydrothermally synthesized at low temperature
Authors:G Dell'Agli  G Mascolo  
Institution:Laboratorio Materiali, Dipartimento di Meccanica, Strutture, Ambiente e Territorio, Università di Cassino, Via G. Di Biasio 43, 03043, Cassino (FR), Italy
Abstract:Nanometric yttria (8 mol%)-stabilized zirconia powders were hydrothermally synthesized at 110 °C for 7 days in the presence of dilute (0.20 M) or concentrated (2.0 M) solutions of (KOH+K2CO3) mineralizer. Zirconia xerogel, crystalline Y(OH)3, crystalline Y2O3 and a xerogel of coprecipitated (Y–Zr) hydroxide were used as starting materials. Setting the content of yttria constant and equal to 8 mol%, three types of mixtures were tested. Zirconia xerogel in mixture with crystalline Y2O3, zirconia xerogel in mixture with crystalline Y(OH)3 and, finally, a xerogel of coprecipitated (Y–Zr) hydroxide were hydrothermally treated.The different characteristics of the resulting powders are discussed in terms of both the mineralizer concentration and the type of Y-based precursor used in the hydrothermal treatments, respectively.Weakly agglomerated cubic ZrO2 powders with primary particles bigger in size and without any preliminary treatment show better performances when they are directly sintered at 1500 °C.
Keywords:Hydrothermal treatment  Cubic ZrO2  Crystallite size  Agglomeration  Sinterability
本文献已被 ScienceDirect 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号