The solubilities of protons in 8YSZ single crystal and polycrystals at 600 °C were investigated using secondary ion mass spectrometry (SIMS). As a measure of proton solubility, deuteron solubility in YSZ was measured because of its lower background level in SIMS measurements. It became possible to quantitatively determine the solubility using a new analytical method proposed here, which includes a procedure to remove the small background signal included in the deuterium signal. The new method was employed for determining the solubilities in YSZ single crystal and polycrystals. Although the solubility in the single crystal was below the detection limit of SIMS (~10¹⁶ cm⁻³), the solubilities in the polycrystals were significantly larger than that in the single crystal. The solubility shows a proportional relationship with the grain boundary density, which strongly suggests that deuterons incorporate mainly into the grain boundaries in YSZ. The deuteron solubility per unit grain boundary area was determined to be 3.2 × 10¹³ cm⁻².

使用二次离子质谱（SIMS）研究了质子在600°C下在8YSZ单晶和多晶中的溶解度。作为质子溶解度的量度，测量了氘在YSZ中的溶解度，因为它在SIMS测量中的背景水平较低。可以使用此处提出的新分析方法定量确定溶解度，该方法包括去除氘信号中包含的小背景信号的过程。该新方法用于测定YSZ单晶和多晶中的溶解度。尽管在单晶中的溶解度低于SIMS的检测极限（〜10 ¹⁶  cm ^-3），多晶中的溶解度明显大于单晶。溶解度与晶界密度成比例关系，这强烈表明氘核主要掺入YSZ的晶界中。单位晶界面积的氘核溶解度为3.2×10 ¹³  cm ^-2。