Production of lithium oxide by decompostion lithium carbonate in the flow of a heat carrier

Annealing effect on conductivity behavior of Li–doped ZnO thin film and its application as ZnO-based homojunction device

“…At high temperature, Li 2 CO 3 can be decomposed into Li 2 O [11,12]. The glass substrates were cleaned in an ultrasonic bath with organic solvents and dried with dry nitrogen before loading in the sputtering system.…”

Local Electronic Structure of Lithium-Doped ZnO Films Investigated by X-ray Absorption Near-Edge Spectroscopy

“…The thickness and diameter of the Li 2 CO 3 disks were controlled to be 0.2 and 1 cm, respectively. The Li 2 CO 3 disks were made by sintering at high temperature; they will be dissociated into Li 2 O and CO 2 at decomposition. , A rotating substrate holder was used to obtain uniform composition distributions in the films. After being deposited, the films were annealed at 450 °C in Ar ambient for 3 h with heating and cooling rates of 3 and 2 °C/min, respectively.…”

Revisited: Decomposition or Melting? Formation Mechanism Investigation of LiCoO2 via In-Situ Time-Resolved X-ray Diffraction

“…It is apparent that CO 2 is released in the thermal decomposition of Li 2 CO 3 , which is a diffusive process by nature. However, the diffusion and release of the CO 2 gas is hindered by the agglomeration of Li 2 CO 3 particles upon reaching the melting point as well as the low pressure of CO 2 saturated vapor (∼4 Torr at 1000 K) . As result, this explains the slow reaction rate in the temperature range of 700–900 K. Additionally, the unwillingness of lithium carbonate to melt corresponds to the increased dependence of the E α on α, which is demonstrated by activation energy increases to maximum of 344 kJ/mol at 20% conversion in Figure .…”

“…In the temperature range of 700−900 K, the increased dependence of the E α on α corresponds to the agglomeration of Li 2 CO 3 particles that hinders the diffusion and release of the CO 2 gas. 25 Once Li 2 CO 3 begins to melt, there is a decreased dependence of E α on α that corresponds to the liberation of CO 2 gas, which indicates an endothermic reaction followed by an irreversible reaction as shown in Figure 3. 16 Finally, the increased dependence E α on α near the end of the reaction can be attributed to the diffusion of lithium ions to the available octahedral sites followed by the structural rearrangement from cubic to rhombohedral.…”

“…In the temperature range of 700–900 K, the increased dependence of the E α on α corresponds to the agglomeration of Li 2 CO 3 particles that hinders the diffusion and release of the CO 2 gas . Once Li 2 CO 3 begins to melt, there is a decreased dependence of E α on α that corresponds to the liberation of CO 2 gas, which indicates an endothermic reaction followed by an irreversible reaction as shown in Figure .…”