A hot-pressing process is applied to improve sinterbility of NASICON (Na ion conductor)-type of Li_1.5Al_0.5Ge_1.5(PO₄)₃ (LAGP) solid electrolyte prepared by sol-gel method. During the hot-pressing process, amorphilization caused by Li loss and reduction of LAGP is observed due to a contact with a carbon mold. To compensate the Li loss, addition of 15% LiNO₃ into LAGP powder before the hot-pressing is needed. By the hot-pressing, the porosity of the LAGP pellet is decreased from 12% to 4%. The grain boundary conductivity of hot-pressed LAGP pellet is 5 times higher than that of conventional atmospheric sintered LAGP pellet. Contrary, bulk conductivities are almost same, indicating that the hot-pressing affects only grain boundaries, not crystal structure. The highest conductivity is obtained in the hot-pressed LAGP pellet with 15% LiNO₃ addition and bulk, grain boundary and total conductivities are 3.22 × 10^-4, 1.69 × 10^-3, 2.7 × 10^-3 S cm^-1, respectively. The activation energy is 0.31 eV, which is comparable to that prepared by conventional melt-quenching method.

进行热压处理以提高通过溶胶-凝胶法制备的NASICON（Na离子导体）型Li _1.5 Al _0.5 Ge _1.5（PO ₄）₃（LAGP）固体电解质的烧结性。在热压过程中，由于与碳铸型的接触，观察到由Li损失和LAGP减少引起的非晶化。为了补偿锂的损失，添加15％的LiNO ₃在需要热压之前先制成LAGP粉末。通过热压，LAGP粒料的孔隙率从12％降低到4％。热压LAGP颗粒的晶界电导率是常规常压烧结LAGP颗粒的5倍。相反，体电导率几乎相同，表明热压仅影响晶界，而不影响晶体结构。导电率最高是在热压LAGP沉淀，用15％的LiNO获得₃加法和松厚度，晶界和总传导率3.22×10 ^-4，1.69×10 ^-3，2.7×10 ^-3小号厘米^-1， 分别。活化能为0.31eV，与通过常规熔融淬火方法制备的活化能相当。