An improvement in sintering property of beta-tricalcium phosphate by addition of calcium pyrophosphate.

نویسندگان

  • Hyun-Seung Ryu
  • Hyuk-Joon Youn
  • Kug Sun Hong
  • Bong-Sun Chang
  • Choon-Ki Lee
  • Sung-Soo Chung
چکیده

The sintering behavior of calcium pyrophosphate (CPP, Ca2P2O7)-doped beta-tricalcium phosphate [TCP, Ca3(PO4)2], prepared by solid state reaction, was investigated in-situ, using dilatometry. Pure beta-TCP undergoes phase transition to alpha-TCP at about 1200 degrees C; hence pure beta-TCP ceramics should be sintered bclow 1200 degrees C. Pure beta-TCP sintered body can achieve a relative density of only 86% when sintered at 1150 degrees C. However, the addition of CPP in the range of 0.5-3 wt% delays phasc transition of beta-TCP and enables sintering of beta-TCP at 1200 degrees C without a phase transformation to alpha-TCP. Due to this effect of CPP added to TCP, CPP-doped beta-TCP ceramics with relative density over 95% could be obtained when sintered at 1200 degrees C for 2 h.

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عنوان ژورنال:
  • Biomaterials

دوره 23 3  شماره 

صفحات  -

تاریخ انتشار 2002