采用机械混合方法,在8YSZ电解质材料中添加3Y-TZP,目的是在满足YSZ电解质电学性能要求的前提下,提高材料的力学性能.试样在常压下烧结,通过弯曲强度﹑断裂韧性﹑电导率测定和相组成分析,讨论了3Y-TZP添加量的影响.实验结果表明:加入3Y-TZP能显著提高陶瓷体的力学性能,弯曲强度和断裂韧性随着添加量的增多而提高;电学性能在0～30%(质量百分比,下同)的添加量时下降很小.添加30% 3Y-TZP的电解质材料在1000 ℃电导率为0.11 S/cm,强度接近300 MPa,综合效果最好.
3Y-TZP was added to 8YSZ by means of mechanical mixing in order to first fulfill the need of electrical property as electrolyte and improve its mechanical property. The samples were sintered in air. The effects of 3Y-TZP addition were investigated through the tests of fracture toughness, bending strength, electrical conductivity and phase composition analysis. The results show that 3Y-TZP improves the mechanical property of 8YSZ material. The fracture toughness and bending strength increase obviously with the increase of 3Y-TZP addition and the conductivity of 8YSZ electrolyte materials dope slightly within 0- 30%. The electrical material when the amount of 3Y-TZP reaches up to 30% embodies excellent properties, with an electrical conductivity of 0.11 S/cm at 1000 ℃ and bending strength of 300 MPa.
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