Manufacture and properties of 8 YSZ electrolyte thin film by tape casting
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摘要: 探索了以YSZ納米粉體為原料,采用流延成型的方法制備YSZ電解質薄片的工藝過程,研究了YSZ納米粉體及流延后坯體的性能,以及通過實驗獲得的瓷體性能.粉體粒度分布窄,在0.1~0.3μm之間,中位徑為0.157μm.坯體在968.9℃開始有明顯收縮,在1 279.9℃收縮最快,而在1400℃后,收縮值基本穩定于20%.坯體的致密度良好,相對密度為64.1%,通過燒結得到的瓷體的相對密度可達97.8%,晶粒細密均勻,大小為1-4 μm,晶界明顯.YSZ薄片隨溫度的升高表現出良好的電性能,在900℃時的電導率達0.106 S/cm.Abstract: YSZ electrolyte thin films were prepared by tape casting from nanocrystalline powder. The properties of YSZ nanocrystalline powder, adobe by tape casting and sintered thin films were analyzed. The YSZ nanocrystalline powder has a narrow size distribution of 0.1-0.2 μm and the median size is 0.157 μm. The beginning shrinkage temperature of the YSZ nano-powder is 968.9℃ from its sintering curve. The highest shrinkage rate appears at 1279.9℃, and by 1400℃ the shrinkage rate is stable, almost up to 20%. The adobe by tape casting has high density and its relative density is up to 64.1%. The relative density of the sintered YSZ thin films is 97.8%. The grain size of YSZ is in the range of 1-4 μm, which show uniform with the microstructure by SEM, as well as grain boundaries are obvious. The YSZ thin films show good electrical properties with increasing temperature and their conductivity is 0.106 S/cm at 900℃.
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Key words:
- nano-powder /
- tape casting process /
- electrolyte thin film /
- sintering property
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