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J. Korean Ceram. Soc. > Volume 40(6); 2003 > Article
Journal of the Korean Ceramic Society 2003;40(6): 566.
doi: https://doi.org/10.4191/kcers.2003.40.6.566
Hydroxyapatite/Polyacrylic Acid 균질복합체의 소결 특성 및 기계적 강도
이병교, 이석기1, 구광모1, 이미혜2, 이형동
경북대학교 무기재료공학과
1경일대학교 공업화학과
2신라대학교 나노소재ㆍ응용화학공학부
Sintering Behavior and Mechanical Strength of Hydroxyapatite/Polyacrylic Acid Homogeneous Composite
ABSTRACT
Hydroxyapatite (HAp)/Polyacrylic Acid(PAA) homogeneous composites of four different composition ratio were preparation by co-precipitation process with synthetic HAp and PAA as a binder. HAP/PAA composites were molding by cold isostatic pressing and were sintering by various condition in air. Crystallinity and structure of sintered HAp/PAA composites were investigated by XRD and FT-IR. Also, the compressive strength and the fracture surface of sintered specimens were measured by UTM and SEM. HAp/PAA composites were showed phase transformation of partially ${alpha}$, ${beta}$-tricalcium phosphate at sintering condition of 1200$^{circ}C$ and 3 h. The pore size and porosity of sintered body were showed the range of 0.2∼3.0 $mutextrm{m}$ and 0.49∼13.43%, respectively. The compressive strength of sintered specimens were appeared the range of 36.6∼58.2 MPa. From these results, the sintered HAp/PAA comosites can be accounted for the microporous HAp having a good compressive strength due to homogeneous pore morphology.
Key words: Hydroxyapatite, Polyacrylic acid, Homogeneous composite, Sintering, Compressive strength, Pore morphology
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