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本文采用火焰喷雾裂解法(FSP)合成了氧化钇稳定氧化锆(YSZ)微纳颗粒,研究了溶剂成分对合成的颗粒形态及粒径的影响,并利用XRD和SEM对生成的颗粒进行了表征.结果表明不同溶剂获得的颗粒晶型均为四方相(t相).采用蒸馏水作为溶剂时,除生成亚微米的球形致密颗粒外,还有许多微米大小的破壳形态颗粒生成.采用乙醇作溶剂时,仅有亚微米大小的球形致密颗粒生成。采用乙醇和2-乙基己酸(2-EHA)混合物作溶剂时,生成的颗粒粒径呈现双峰分布;既生成了球形致密的亚微米大颗粒,又观察到有絮状形态的纳米颗粒生成.实验发现合成颗粒的粒径受乙醇和2-EHA的配比控制.随着混合溶剂中2-EHA含量增加,亚微米大颗粒逐渐减少,纳米颗粒逐渐增多,本文对其生成机理进行了分析.
In this paper, yttria-stabilized zirconia (YSZ) micro-nano particles were synthesized by flame spray pyrolysis (FSP). The effects of solvent composition on the morphology and particle size of the synthesized particles were investigated. The particles were characterized by XRD and SEM The results show that the crystalline phases obtained from different solvents are all tetragonal phase (t phase) .When distilled water is used as the solvent, besides the submicron spherical dense particles, When solvent, only sub-micron sized spherical dense particles are generated. When the mixture of ethanol and 2-ethylhexanoic acid (2-EHA) was used as a solvent, the particle size of the resulting particles presented a bimodal distribution; both the spherical dense submicron particles and the flocculent nanoparticles were observed The results showed that the particle size of the synthesized particles was controlled by the ratio of ethanol and 2-EHA.As the content of 2-EHA in the mixed solvent increased, the submicron particles decreased gradually and the nanoparticles increased gradually. analysis.