| Influence of CaO Additions on the Densification
and Microstructure of Beryllia |
R. BHAT AND S. V. K. RAO
Pages : 77-82
DOI : 10.1080/0371750X.1986.10822795 |
| Abstract |
| Beryllium oxide, by virtue of its electrical resistivity and high thermal
conductivity has a unique place in its application as a material for
insulator components in electronics for which impervious high density
bodies are requested. As BeO is a difficult material to sinter to high
densities at temperatures less than 1600°C, CaO was considered as
one of the additives that enhance densification without impairing the
electrical properties. The influence of 0.5 to 5 wt% addition of CaO
on the sintering behaviour of BeO derived from beryllium sulphate
was studied at temperatures between 1100° and 1500C in vacuum
and air atmospheres. It was found that CaO addition substantially
enhanced densification with concurrent grain growth and reduced
open porosity. |
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