全固体Ag/AgCl电极的制备工艺研究
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摘要
探讨了制备全固体Ag/AgCl电极所用的AgCl前驱粉体的工艺技术,对其进行了形貌和物相分析,并对工艺改进后制备电极的短期稳定性、电化学噪声水平进行了测试。结果表明,以AgNO3和NaCl为原料,利用乙醇作为助磨剂,球磨8h后,利用冷冻干燥法所制备的AgCl粉体分散性极好,大小均匀,在490℃下烧结后所制备的Ag/AgCl复合电极一致性好,同种电极之间的极差电位约为0.006mV。该电极具有良好的短期稳定性能,电极电位波动量不超过0.080mV/24h,电极电压噪声密度在1Hz处可降低至8.34nV/Hz1/2。
The preparation technology of the precursor powder of AgCl used in Ag/AgCl electrode was discussed, which were characterized by scanning electron microscope(SEM) and X-ray diffraction(XRD). And the short term stability and electrochemical noise of the prepared electrodes were carried out. Results show that the precursor powder of AgCl prepared by freeze-drying method, with AgNO3 and NaCl as raw materials, ethanol as grinding aids, milling time 8 h, is good in dispersion and uniform in size. The prepared Ag/AgCl electrode sintered at 490℃ has a good consistency and the potential difference of the two like electrodes is less than 0. 006mV. The electrode possesses good short term stability, with a potential difference drift of less than 0. 080mV/24h. The voltage noise density of electrode decreases to 8. 34nV/Hz1/2 at 1 Hz.
The preparation technology of the precursor powder of AgCl used in Ag/AgCl electrode was discussed, which were characterized by scanning electron microscope(SEM) and X-ray diffraction(XRD). And the short term stability and electrochemical noise of the prepared electrodes were carried out. Results show that the precursor powder of AgCl prepared by freeze-drying method, with AgNO3 and NaCl as raw materials, ethanol as grinding aids, milling time 8 h, is good in dispersion and uniform in size. The prepared Ag/AgCl electrode sintered at 490℃ has a good consistency and the potential difference of the two like electrodes is less than 0. 006mV. The electrode possesses good short term stability, with a potential difference drift of less than 0. 080mV/24h. The voltage noise density of electrode decreases to 8. 34nV/Hz1/2 at 1 Hz.
引文
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[2]张燕,宋玉书,王源升,等.[J].武汉理工大学学报,2007,29(4):64-67.
[3]Ansuini F J,Dimond J R,et al.[J].Materials Perfor-manec,1994,33(11):14-17.
[4]张翼.全固态海洋传感器稳定性研究[D].西安:西安电子科技大学,2009.
[5]卫云鸽,曹全喜,黄云霞,等.[J].人工晶体学报,2009,38(8):394-398.
[6]Bertocci U,Huet F,et al.[J].Corrosion,1995,51(2):131-144.
[7]Budevski E,Obretenov W,Bostanov W,et al.[J].Elec-trochimical Acta,1989,34(8):1023-1029.
[8]张鉴清,张昭,王建明,等.[J].中国腐蚀与防护学报,2001,21(5):310-320.
[9]卢阳泉,梁子斌,刘建毅,等.[J].物探与化探,1999,23(1):70-71.
[10]席继楼,赵家骝,王燕琼,等.[J].地震,2002,22(2):47-53.
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