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Preparation of Transparent 3 Y ‐ TZP Nanoceramics with No Low‐Temperature Degradation
Author(s) -
Xiong Yan,
Fu Zhengyi,
Pouchly Vaclav,
Maca Karel,
Shen Zhijian
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12919
Subject(s) - materials science , sintering , grain size , degradation (telecommunications) , yttria stabilized zirconia , ceramic , nanoscopic scale , hydrothermal circulation , relative density , tetragonal crystal system , transmittance , composite material , cubic zirconia , mineralogy , chemical engineering , nanotechnology , crystallography , optoelectronics , chemistry , crystal structure , telecommunications , computer science , engineering
The progresses of the relative density, average grain size ( GS ), and maximum pore size entering into the final sintering stage are investigated in 3 mol% yttria‐stabilized tetragonal zirconia polycrystals (3 Y ‐ TZP ) compacts in the range of 87%~99% theoretical density. It is found that during conventional pressureless sintering, the pores in the compact enlarged dramatically, which appears to be the major obstacle for preparing fully dense nanoceramics. Transparent 3 Y ‐ TZP nanoceramics with an average GS of 87 nm were prepared by exploiting microstructural refinement on nanoscale. The yields a maximal optical transmittance of 67% and shows no noticeable low‐temperature degradation after 100 h aging at 134°C under a hydrothermal pressure of two bars.