K. Urabe et al., EFFECT OF ADDITIVES ON THE PRESSURELESS SINTERING OF CALCITE, Nippon Seramikkusu Kyokai gakujutsu ronbunshi, 103(10), 1995, pp. 1097-1098
Effect of additives on the sintering of calcite under the atmospheric
pressure was studied. Calcite could be sintered at about 793 K by addi
ng a small amount of lithium fluoride. The microstructure of the sinte
red calcite was consistent with that of ceramics fabricated by liquid-
phase sintering.