A technique is proposed whereby recrystallization can be investigated quantitatively in a ceramic material composed of grains widely ranging in size (due to localization of sintering) and containing grain-boundary barriers (such as impurities and micropores) that vary in spatial distribution and quantity. It is shown that only primary recrystallization takes place in alumina sintered at 1550–1700°C and that the grain size distribution is about the same as in a barrier-free material thus implying that the recrystallization proceeds in an effectively homogeneous medium. An addition of 2% Nb2O5 to activate sintering leaves the general pattern of recrystallization unchanged and only quantitative differences are noted. These are an increase in the average particle size (because a liquid phase appears and causes a change in the properties of the boundaries and because structure defects are formed when Nb2O5 dissolves in Al2O3, which accelerates bulk diffusion) and an increase in the number of grain sizes (related to the increased inhomogeneity of contacts between alumina particles).
Refractories and Industrial Ceramics – Springer Journals
Published: Nov 27, 2007
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.
All for just $49/month
Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.
Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.
It’s easy to organize your research with our built-in tools.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera