TITLE:
Net-Shape Clay Ceramics with Glass Waste Additive
AUTHORS:
Chantale Njiomou Djangang, Elie Kamseu, Antoine Elimbi, Gisèle Laure Lecomte, Philippe Blanchart
KEYWORDS:
Clay, Waste Glass Powder, Sintering, Composite, Cameroon
JOURNAL NAME:
Materials Sciences and Applications,
Vol.5 No.8,
June
30,
2014
ABSTRACT: In this paper, a glass powder
from waste containers was mixed (10 - 40 wt.%) with a kaolinitic sandy
clay from Cameroon to elaborate net-shape ceramics, fired at 1100°C. The
sintering behavior was from dilatometry and thermo gravimetric analyses
together with the characterization of porosity and flexural strength. The
increase of glass to kaolinite ratio reduces the sintering shrinkage leading to
a none-densification sintering when 40 wt.% of glass is added in the mixture. The volume variation during the
whole firing process is from the individual volume variations during the quartz
transformation, the structural reorganization of kaolinite and during
sintering. Quartz size and relative quantity have a significant role on the
first processes since it leads to either cohesive or un-cohesive behavior. But
the glass quantity strongly controls the second and the third thermal processes
because glass additions change the recrystallization processes, leading to the formation of dense clay-glass agglomerates distributed within the three
dimensional quartz network.