Abstract The structural changes of nickel-aluminum and nickel-zinc-aluminum hydrotalcites under heating were studied. The temperature and the activation energy required for hydrotalcites decomposition and NiO formation depend on the kind and on the amount of cations. Upon heating, the cell parameters and the crystal sizes changed, aluminum and zinc delaying crystal sintering and zinc leading to the smallest crystals of nickel oxide. The increase of aluminum and/or zinc content decreases the crystals size of hydrotalcites but zinc decreased the specific surface area. The zinc-containing solids produced oxides at lower temperatures while the zinc-free solids were the most thermally stable, possibly due to the increase of a parameter caused by the larger ionic radius of zinc. All solids were mesoporous with interparticles mesopores, whose shape depends on the composition of the solids and the conditions of collapse of the hydrotalcite type structure.

中文翻译：

---

Ni-Zn-Al水滑石在加热下的结构和织构变化监测

摘要 研究了镍铝和镍锌铝水滑石在加热条件下的结构变化。水滑石分解和 NiO 形成所需的温度和活化能取决于阳离子的种类和数量。加热时，电池参数和晶体尺寸发生变化，铝和锌延迟晶体烧结，锌导致最小的氧化镍晶体。铝和/或锌含量的增加降低了水滑石的晶体尺寸，但锌降低了比表面积。含锌固体在较低温度下产生氧化物，而无锌固体的热稳定性最高，这可能是由于锌离子半径较大导致参数增加。所有固体都是中孔的，颗粒间有中孔，