摘要
以共沉淀法制备的煅烧态ZrO2(Y2O3)超细粉末为研究对象,研究了球磨对其物理和烧结性能的影响。结果表明,球磨虽可以有效地减小粉末的团聚尺寸,但对粉末一次颗粒尺寸的影响不大,球磨可以显著增加团聚程度较严重的煅烧态粉末的比表面积,但对团聚程度较轻的粉末,其影响不大;球磨还可显著减小粉末的晶粒尺寸,这与粉末在球磨过程中发生了相变有关。此外,对团聚较严重的粉末,球磨可改善其烧结性能,但对团聚程度较轻的粉末,球磨的作用不明显。
he effect of ball-milling on the properties of ultrafine ZrO2 (Y2O3) powders prepared by coprecipitation under different conditions is investigated. It is shown by the expertimental results that the agglomerate size of as-calcinated powders can be effectively decreased by ball-milling but the primary particle size is hardly affected. The surface area of seriously agglomerated powders can be markedly increased by ball-milling but that of softly agglomerated powders is not evidently increased. The crystal size of as-calcinated powders becomes much finer after ball-milling because transformation of the powder from tetragonal structure to monoclinic structure occurs during ball-milling. It is also shown that ball-milling can be used to improve the sinterability of seriously agglomerated powders.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
1995年第2期45-49,共5页
Rare Metal Materials and Engineering
基金
国家自然科学基金