Effect of TiO2 on mullite formation in mixture of Nigeria sourced kaolinite and calcined alumina

In this study, the effect of TiO2 when added to a mixture Nigerian sourced kaolin and calcined alumina powder (50:50) was investigated. The influence Ti4+ ion on physico-mechanical property (apparent porosity, bulk density modulus rupture), phase microstructural evolution studied at sintering temperature 1600?C mullitisation has been maximized based previous reports. sintered samples showed considerably high porosity about 16 %, slight reduction 5 % in observed addition. There no appreciable change due doping, but rupture (MOR) reduced appreciably from 43 MPa 36 doping. As shown by XRD, mullite seen as major with negligible cristobalite for undoped sample. doped sample displayed corundum minor phases. appeared more phases than indicating higher percentage formation. study shows presence acicular round edges good aspect ratio. inter-granular intra-granular pores might have contributed strength 1600?C.