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지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한양대학교 청정에너지연구소 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제17권 제10호
- 발행연도
- 2016.10
- 수록면
- 1,033 - 1,041 (9page)
이용수
초록· 키워드
Hydroxyapatite is the most important bio ceramic, due to its structure and chemical composition which is similar to bone.
Since feeble fracture toughness, brittleness and low tensile strength have restricted their use, for overcoming this problem, theywere often used as a secondary component. HAp-Al2O3 nano-composite powder combined the benefits of biocompatibility ofHAp and high strength of Al2O3. When HAp-Al2O3nano-composite powders were sintered at a higher temperature than 1100-1200 oC, HAp was decomposed and converted to the second phase of TCP, due to the formation of calcium aluminateincreasing decomposition speed of HAp to TCP at higher degree than 1100-1200 oC temperatures; therefore, with the additionof additives to the powders, the decomposition reaction of HAp could be inhibited and the properties could be improved. Inthis study the effects of alumina as reinforcement, pH, surfactant and different additives were investigated. At first,hydroxyapatite powder was synthesized. Then, the effect of different percentage of alumina (15, 20, 25), different pHs (9, 10,11), different surfactants and different additives on HAp-Al2O3 nano-composite powder were studied. The results showed thatthe addition of different additives resulted in increase of the thermal stability and properties of HAp-Al2O3nano compositepowder. By replacement of Cl? and F?ions with OHinHAp structure, decomposition of HAp decreased and stability of HApat higher temperatures was increased. Owing to the decomposition of HAp, the reaction between CaO and Al2O3 reduced;therefore, the amount of calcium alumina phases decreased something which resulted in Al2O3 phase. Moreover, replacementof Cl?and F?ions in the apatite structure limited the growth of the grains and decreased the crystallinity that led to a bettersolubility and bioactivity behavior of nano composite powder.
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