高温下锂离子在低掺镁铌酸锂晶体中的扩散（英文）
发布时间：2018-10-12 21:30
【摘要】：研究了高温富锂气氛下锂离子在低掺镁铌酸锂晶体中的扩散。采用气相输运平衡法制备了掺杂1mol%MgO的不同锂含量的铌酸锂(Mg1LN)晶体,采用热分析仪测试了晶体的居里温度。制备了一系列不同锂含量的Mg1LN多晶料,拟合了晶体锂含量与居里温度的关系。采用Boltzmann-Matano法求解了扩散方程。结果表明,扩散温度为1100℃时,Mg1LN晶体中锂离子扩散系数为3.2×10~(-9)~13.0×10~(-9)cm~2/s,当扩散温度为1145℃时锂离子扩散系数约是1100℃时扩散系数的三倍。因此,适当提高扩散温度是提高气相输运平衡法制备近化学计量比低掺镁铌酸锂晶体效率的有效办法.
[Abstract]:The diffusion of lithium ions in lithium-doped lithium niobate crystals at high temperature was studied. Lithium niobate (Mg1LN) crystals doped with 1mol%MgO were prepared by gas phase transport equilibrium method. Curie temperature of the crystals was measured by thermal analyzer. A series of Mg1LN polycrystalline materials with different lithium contents were prepared and the relationship between lithium content and Curie temperature was fitted. The diffusion equation is solved by Boltzmann-Matano method. The results show that when the diffusion temperature is 1100 鈩，
本文编号：2267663
[Abstract]:The diffusion of lithium ions in lithium-doped lithium niobate crystals at high temperature was studied. Lithium niobate (Mg1LN) crystals doped with 1mol%MgO were prepared by gas phase transport equilibrium method. Curie temperature of the crystals was measured by thermal analyzer. A series of Mg1LN polycrystalline materials with different lithium contents were prepared and the relationship between lithium content and Curie temperature was fitted. The diffusion equation is solved by Boltzmann-Matano method. The results show that when the diffusion temperature is 1100 鈩，
本文编号：2267663
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