Abstract
Several oxide powders (SrTiO3, BaTiO3 and Y2O3) were mixed with TiB2 powder and then sintered by the SPS process. The effects of TiB2 addition on the densification behaviours of these oxides during SPS were investigated and its mechanisms were discussed. The TiB2 addition was found to be quite effective for reducing the densification temperature of these oxides during sintering. In the case of the SrTiO3, after sintering, the sample was composed of SrTiO3 and TiB2 only, indicating that reactive sintering and/or liquid phase sintering did not occur. Even when sintered by the conventional hot pressing, it was found that TiB2 addition was also quite effective for reduction in densification temperature as well as when sintered by SPS, suggesting that the effect of TiB2 addition is available for the conventional heating process. These experimental results show the possibility of TiB2 as a sintering agent for low temperature densification of oxides.
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