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The influence of boehmite gel additions on the green and sintered properties of alumina porcelain is investigated. Green bodies are reinforced in the presence of gel through the building of hydrogen bonds within porcelain mixtures. The particular reactivity of this system leads to shrinkage inhibition and densification problems during sintering. Adjusting the formulation of these materials slightly...
The influence of nanosized alumina additions and of grain size of alumina filler on the reaction-sintering of alumina porcelain is investigated. Phase and porosity evolution has been studied from room temperature up to 1400 o C. When vitrification occurs the presence of alumina nanoparticles leads to a new type of mullitisation which has two major consequences: a volume expansion resulting...
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