Sintering magnesium oxide made from magnesium hydroxycarbonate

Conclusions The studies have shown that the fine structure of activated MgO depends on whether the temperature regime under which the magnesium hydroxycarbonate is calcined is fast or slow. In the rapid activation regime, subdispersed particles of MgO with maximum defects of the crystal lattice are formed and this help the diffusion sintering of the MgO.The use of nonaqueous organic binding agents which burn out rapidly in the 300–460°C interval and (in the case of the slow activation regimes) the addition of chrome-spinel and ZrO₂ also improve the sintering of MgO.The high initial disperseness of MgO and the presence of a surface-active binder make it possible by firing at 1500–1600°C to produce a high-density material which is suitable for the manufacture of dense and thermal shock resistant periclase articles.Deceased.Translated from Ogneupory, No. 5, pp. 47–51, May, 1979.