Cold sintering of ZnO using crystalline zinc acetate dihydrate in the absence of added water is examined. Prior studies use an aqueous solvent, usually containing a weak acid, base, or organic salt, as the mass transport phase during cold sintering. This paper shows equivalent densification of ZnO using solid, powdered acetate as compared to previously mentioned aqueous-based transport phases. It also presents the potential to add zinc acetate in higher quantities without increasing the amount of total added transport phase, as solubility limits in aqueous solvents define the maximum amount of zinc acetate that can be added for a given volume of liquid. Experiments were conducted using the previously reported sinterometer, allowing for in situ experimental monitoring to show densification trends of this new transport phase as a function of concentration, time, and temperature. The potentially dramatic impacts of varying humidity during powder preparation on final sample density will also be discussed.

中文翻译：

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具有结晶醋酸锌二水合物传质相的冷烧结氧化锌

研究了在不添加水的情况下使用结晶醋酸锌二水合物冷烧结 ZnO。先前的研究使用含水溶剂，通常含有弱酸、碱或有机盐，作为冷烧结过程中的传质相。这篇论文表明，与前面提到的水基传输相相比，使用固体粉末状醋酸盐对 ZnO 的致密化效果相当。它还具有在不增加总添加的传输相量的情况下添加更多醋酸锌的潜力，因为在水性溶剂中的溶解度限制定义了对于给定体积的液体可以添加的最大醋酸锌量。使用先前报道的烧结计进行实验，允许进行原位实验监测，以显示作为浓度、时间和温度函数的这种新传输阶段的致密化趋势。还将讨论粉末制备过程中不同湿度对最终样品密度的潜在巨大影响。