Densification and properties of lime with V2O5 additions

Effect of Al(OH)3 and La2O3 on the sintering behavior of CaO granules via CaCo3 decomposition

“…Although the hydration resistance of CaO granules in this study was not satisfied when compared with those prepared from calcium hydroxide [12][13][14][15],this study suggested the introduction of Al(OH) 3 and La 2 O 3 improved the properties of CaO granulesthat prepared by one-step calcination technology. Compared with previous experiments by Ghosh [19], the average grain size of CaO in this study was increased and the weight gain in the humidity chamber was decreased significantly. Moreover, the prepared CaO granules can be directly used in the preparation of lime-based refractories without secondary crushing, which would improve the convenience of preparation of refractories.…”

“…It was reported that CaO derive directly from the decomposition of CaCO 3 was very reactive and highly sinterable [18,19], but many works so far have focused on secondary calculationmethod to get adensified lime sample because that can destroy CaCO 3 pseudomorph in limestone sintering and promote the densification of the sample. But the secondary calculations technology was high energy consumption.…”

Effect of chopped ZrO2 fiber content on the microstructure and properties of CaO-based integral ceramic mold

“…CaO has long been considered as an attractive refractory for application in metallurgical and ceramics industries because of the global abundant sources of high-purity limestone, as well as its advantages of high melting temperature, low vapor pressure, and excellent thermodynamic stability [1][2][3][4][5]. In recent years, CaO was studied as a potential ceramic core material for investment casting due to the reactionresistance to molten active alloy [6][7][8], easy dissolution compared to common ceramic core materials, such as fused silica or alumina [9][10][11], and approximating the thermal expansion coe cient of superalloys [12].…”

“…In recent years, CaO was studied as a potential ceramic core material for investment casting due to the reactionresistance to molten active alloy [6][7][8], easy dissolution compared to common ceramic core materials, such as fused silica or alumina [9][10][11], and approximating the thermal expansion coe cient of superalloys [12]. However, in spite of these primary advantageous properties, the application of CaO is inhibited due to its hydration susceptibility in atmospheric moisture [2][3][4][5][13][14], which increased the di cultly of fabricating CaO ceramics as well. Most existing methods for forming CaO ceramic, such as hot-pressing [1], cold-pressing [3][4][5], can only fabricate simple architectures, which makes them untenable for generating complex ceramic structures.…”

“…However, in spite of these primary advantageous properties, the application of CaO is inhibited due to its hydration susceptibility in atmospheric moisture [2][3][4][5][13][14], which increased the di cultly of fabricating CaO ceramics as well. Most existing methods for forming CaO ceramic, such as hot-pressing [1], cold-pressing [3][4][5], can only fabricate simple architectures, which makes them untenable for generating complex ceramic structures.…”