Electrochemical Behavior and Morphology of Anodic Titanium Oxide Films

양극산화에 의한 티타늄 산화피막의 전기화학적 거동과 형상

  • Byeon K.J. (Dept. of Dentistry, Ulsan University Hospital) ;
  • Kim C.S. (Dept. of Oral and Maxillofacial Surgery, College of Dentistry, Kyungpook National University) ;
  • Zhu Xiaolong (Dept. of Dental Biomaterials, College of Dentistry and Institute of Biomaterials Research and Development, Kyungpook National University) ;
  • Kim K.H. (Dept. of Dental Biomaterials, College of Dentistry and Institute of Biomaterials Research and Development, Kyungpook National University)
  • 변기정 (울산대학교병원 치과학교실) ;
  • 김진수 (경북대학교 치과대학 구강악안면외과학교실) ;
  • ;
  • 김교한 (경북대학교 치과대학 치과생체재료학교실 및 생체재료연구소)
  • Published : 2000.06.01

Abstract

The galvanostatic anodization of commercially Pure titanium plate (c.p.Ti, grade 2) was investigated in various concentrations of aqueous $H_3PO_4$ from 0.05M to 0.7M. The surfaces of anodic oxide films, formed by the current density in the range between 0.3 and $l.0 A/dm^2$. were analyzed by SEM and XRD. The voltage-time (V-T) curves displayed an initial linear part and a subsequent parabolic part, and the initial slopes increased with an increase in the current density in 0.05M $H_3PO_4$. As the concentration of the electrolyte increased, the V-T corves exhibit no change but the final voltage decreased. The anodic oxide film of titanium developed from fine grains to snowflake-like grains in a layered structure with an increase in the concentration of the electrolyte and current density. Sparking at the interface of the oxide/electrolyte accompanied the local deposition and dissolution of the oxide film through discharging. The crystallinity of the anodic oxide film increased with the anodizing voltage and decreased with an increase in the concentration of the electrolyte.

순 티타늄(공업용 순 티타늄, 2급)의 0.5M에서 0.7M 농도의 $H_3PO_4$ 용액에서 $0.3\~l.0 A/dm^2$의 정전류 밀도변화에 따른 anodizing 거동을 관찰하였다. 이때 형성된 산화피막을 SEM과 XRD로 관찰, 분석하였다. 실험결과 0.05M $H_3PO_4$ 용액의 조건에서 전압-시간 (V-T)곡선의 초기에는 직선적인 관계를 보였고, 전류밀도가 증가함에 따라 포물선의 형태를 나타내었다. 그리고 V-T곡선의 형태는 전해질의 농도의 증가에 따라 큰 변화가 없었지만, 최종적인 전압은 감소하였다. 티타늄의 산화피막은 전해질 농도와 전류밀도가 증가할수록 미세한 입자 형태에서 눈꽃과 같고 층을 이룬 입자들로 구성된 구조를 나타내었다. 산화막과 전해질의 계면에서의 방전에 의해 산화피막의 국소적인 침착과 용해를 동반하였다. 산화피막의 결정성은 anodizing 전압이 증가할수록 증가하였고 전해질의 농도가 증가할수록 감소하는 경향을 보였다.

Keywords

References

  1. Quintessence Int. v.16 no.1 Tissue integrated dental prostheses P.-I. Branemark;G.A. Zarb;T. Albrektsson
  2. J. Mater.Res. v.22 Titanium : The implant material of today R. Van Nookt
  3. Clin. Mater. v.9 Physico-chemical considerations of titanium as a biomaterial P. Tengvall;I. Lundstrom
  4. Acta. Orthop.Scand v.52 Osseointegrated titanium implants T. Albrektsson;P.-I. Branemark;H.-A. Hansson;J. Lindstrom
  5. J. Periodontol v.62 Titanium endosseous-soft tissue interface T.G. Donley;W.B. Gillete
  6. J. Colloid Interface Sci. v.150 Oxidation kinetics of titanium thin film in model physiologic environments K.E. Healy;P. Ducheyne
  7. J. Colliod Interface Sci. v.110 Auger electron spectroscopic studies of the interface between human tissue and implants of titanium and stainless steel J.E. Sundgren;P. Bodo;I. Lundstrom
  8. Int. J. Oral Maxillofac. Implants v.3 Biomaterial and implant surface : A surface science approach B. Kasemo;J. Lausmaa
  9. J. Biomed. Mater. Res. v.30 Effect of titanium surface roughness on chondrocyte proliferation, matrix production, and differentiation depends on the state of cell maturation Z. Schwartz;J.Y. Martin;D.D. Dean;J. Simpson;D. L. Cochran;B.D. boyan
  10. Crit. Rev.Oral Biol. Med. v.2 The concept of osseointegration and bone matrix expression C.M. Stanford;J.C. Keller
  11. CRC Critical Reviews of Biocompatibility v.2 Surface science aspects on inorganic biomaterials B. Kasemo;J. Lausmaa
  12. J. Biomed Mater. Res. v.25 Influence of surface characteristics on bone integration of titanium implants A histomorphometric study in miniatrue D. Buser;R.K. Shenk;S. Steinemann;J.P. Fiorelini;C.H. Fox;H. Stich
  13. J. Mater. Sci. v.8 Anodic oxidation of titanium and its alloys A. Aladjem
  14. Anodizing titanium, Proceedings of the international conference on titanium products and applocation v.1 J.L. Delplancke;R. Winand
  15. Ber. Bunsenges. Phys. Chem. v.101 Influence of the crytallization process on the photoelectrochemical behaviour of anodic TiO2 films S. Piazza;L. Cala;C. Sunseri;F. Di Quarto
  16. Modern aspects of electrochemistry v.23 J. OM. Boris;R. E. White;B. E. Conwa