(1) Mn1.5Co1.5O4 powder was prepared by sol- gel method. The phase composition and particle morphology of the powders were characterized by observing the stability of the geland using XRD. The results show that the nanometer Mn1.5Co1.5O4 powder with single phase size, uniform size and high crystallinity can be obtained by calcination at 750 ℃ for 4h.

(2) Mn1.5Co1.5O4 coating was prepared by slurry coating. The surface and cross-sectional morphology of the coating were observed by SEM. The results show that the coating is compacted and compacted at 750 ℃. When the mixing ratio of Mn1.5Co1.5O4 powder and binder is 3.5: 2, the coating effect is good and the density is high.

(3) The samples of LNFO were prepared by sol- gel method and characterized by XRD and SEM. The results showed that the nano-sized LNFO powders with single phase size,  high crystallinity and high crystallinity could be obtained by calcination at 800℃ for 4h. The coating is also tightly bonded to the substrate and has a high density. The diffusion of Cr and the inhibitory effect of Mn1.5Co1.5O4 on the oxidation rate of Cr were determined by line scanning.

(4) Assemble two samples. stainless steel / LNFO / stainless steel and stainless steel / Mn1.5Co1.5O4 / LNFO / Mn1.5Co1.5O4 / stainless steel.Then the two groups of samples with no coating control experiments, followed by contact resistance test, both the conductivity increases with the temperature increases, to determine the Cr And Mn1.5Co1.5O4 coating on the oxidation rate of Cr element inhibition, containing Mn1.5Co1.5O4 coating conductivity of the sample conductivity is small, the conductivity is large. From the data, the coated conductivity is about 10 times the conductivity of the coating.

Keywords: Sol–Gel；LNFO；SOFC；Coating of Mn1.5Co1.5O4

目录

第一章绪论 1

1.1研究背景与进展 1

1.2锰钴尖晶石材料 2

1.2.1锰钴尖晶石材料应用背景 2

1.2.2锰钴尖晶石材料的简介 3

1.3固体氧化物燃料电池 4

1.4金属连接体保护层材料 4

1.4.1金属连接体保护层材料的制备方法 4

1.4.2溶胶–凝胶法介绍 4

1.5实验的目的和意义 5

第二章实验过程 6

2.1实验原料 6

2.2实验仪器 6

2.3样品制备（溶胶–凝胶法） 7

2.4 X射线衍射测试（XRD） 7

2.5浆料涂覆法制备涂层 8

2.6扫描电镜测试 8

2.7四电极法测试电阻 8

2.8注意事项 9

第三章样品表征及分析 10

3.1Mn1.5Co1.5O4的XRD及SEM表征和分析 10

3.1.1XRD表征和分析 10

3.1.2SEM表征和分析 10

3.2LNFO制备与表征 11

3.2.1LNFO的制备 11

3.2.2