TY - JOUR
T1 - Dense mullite from attrition milled kyanite and α-alumina
AU - Aguilar-Santillan, Joaquin
AU - Balmori-Ramirez, Heberto
AU - Bradt, Richard C.
PY - 2007
Y1 - 2007
N2 - Effects of attrition milling on the decomposition of kyanite (Al 2SiO5) and its reaction with α-alumina (Al 2O3) to form stoichiometric mullite (3Al2O 3·2SiO2) are reported. Kyanite-alumina mixes were attrition milled for times from 1 h to 12 h. With increasing milling time, the kyanite decomposition was accelerated and secondary mullite formation from the reaction between the rejected silica and the added alumina was enhanced. Milling reduced the decomposition expansion from +15.0% to +0.1% and the final contraction or densification from +2.5% to -13.7%. During firing complete mullite formation occurred after firing at only 1623 K/1h (1350°C/1 h) to produce a dense mullite ceramic with a fine grain size (-1 μm).
AB - Effects of attrition milling on the decomposition of kyanite (Al 2SiO5) and its reaction with α-alumina (Al 2O3) to form stoichiometric mullite (3Al2O 3·2SiO2) are reported. Kyanite-alumina mixes were attrition milled for times from 1 h to 12 h. With increasing milling time, the kyanite decomposition was accelerated and secondary mullite formation from the reaction between the rejected silica and the added alumina was enhanced. Milling reduced the decomposition expansion from +15.0% to +0.1% and the final contraction or densification from +2.5% to -13.7%. During firing complete mullite formation occurred after firing at only 1623 K/1h (1350°C/1 h) to produce a dense mullite ceramic with a fine grain size (-1 μm).
KW - Alumina
KW - Kyanite
KW - Mullite
KW - Sinterization and attrition milling
UR - http://www.scopus.com/inward/record.url?scp=33947594151&partnerID=8YFLogxK
M3 - Artículo
SN - 1229-9162
VL - 8
SP - 1
EP - 11
JO - Journal of Ceramic Processing Research
JF - Journal of Ceramic Processing Research
IS - 1
ER -