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Solid state sciences v.64, 2017년, pp.13 - 22   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Thermal characterization of tetrabasic lead sulfate used in the lead acid battery technology

Ferg, E.E. (Department of Chemistry, Nelson Mandela Metropolitan University, PO Box 77000, Port Elizabeth 6031, South Africa ) ; Billing, D.G. (DST-NRF Centre of Excellence in Strong Materials, Materials for Energy Research Group University of the Witwatersrand, Private Bag 3, PO Wits, 2050, South Africa ) ; Venter, A.M. (Research and Development Division, Necsa SOC. Ltd., PO Box 582, Pretoria 0001, South Africa ) ;
  • 초록  

    Abstract The thermal production of 4PbO·PbSO 4 was comprehensively studied and characterized for two syntheses routes, i.e. either heating 3PbO·PbSO 4 ·H 2 O, or a mixture of 4PbO:PbSO 4 , in air to about 700 °C. In the 3PbO·PbSO 4 ·H 2 O approach, the formation of an intermediate amorphous phase occurred at around 210 °C with the loss of H 2 O from the hydrated structure. Formation of 4PbO·PbSO 4 initiated at around 270 °C with predominantly 4PbO·PbSO 4 and 13% residual PbO·PbSO 4 existing at 700 °C. With the synthesis route of mixing a stoichiometric ratio of 4PbO with PbSO 4 , an intermediate phase of PbO·PbSO 4 formed at around 300 °C, before the 4PbO·PbSO 4 phase started to form at around 500 °C. Upon further heating, 4PbO·PbSO 4 was the predominant phase with 8% of PbO·PbSO 4 remaining. Both samples decomposed upon further heating to 850 °C. Powder neutron diffraction studies of the final 4PbO·PbSO 4 products from the two different synthesis routes showed similar crystallographic unit cell lattice parameters with slight differences in the PbO:PbSO 4 contents. This could possibly be linked to differences observed in the microscopic crystallite shapes from the two synthesis routes. Highlights Temperature in-situ powder X-ray diffraction of 4PbO·PbSO 4 by two separate synthesis methods were done. Synthesis route one was thermal degradation of 3PbO·PbSO 4 ·H 2 O. Synthesis route two was thermal reaction of 4PbO with PbSO 4 . The two different routes produced crystals with different shapes and sizes of the final reaction product. Neutron powder diffraction and powder x-ray diffraction showed that the two final products had similar crystallographic characteristics. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Tetrabasic lead sulfate .   Tribasic lead sulfate .   Lead sulfate .   Lead oxide .   In-situ temperature X-ray powder diffraction .   Powder neutron diffraction.  

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