Paper Title:
Preparation of β-TCP/TiO2 Composite by Hot-Pressing
  Abstract

In this work, tricalcium phosphate [TCP, β-Ca3(PO4)2]/titania composite were prepared with different ratio of 75/25, 50/50 and 25/75 (HA/TiO2, wt %). The TiO2 and hydroxyapatite (HA) powders, as starting materials, were synthesized by precipitation and hydrothermal methods, respectively. The sintered bodies of β-TCP/TiO2 composite were prepared by hot pressing at pressure of 30 MPa and temperature of 800-1000 oC for 30 min under the pressure of 30 MPa in N2 atmosphere. During the sintering process, hydroxyapatite was decomposed to β-TCP and CaTiO3 at elevated temperature because TiO2 could accelerate the decomposition of hydroxyapatite. The hot-pressed composite with 98% of sintered density, showed high value of 1080 Hv in hardness, compared with the pure hydroxyapatite (600 Hv) before immersion in distilled water. Increasing sintering temperature led densification of the composite with moderately uniform microstructures. As increasing the amount of TiO2, the surface of the composite was less damaged or dissolved.

  Info
Periodical
Solid State Phenomena (Volumes 121-123)
Edited by
Chunli BAI, Sishen XIE, Xing ZHU
Pages
983-986
DOI
10.4028/www.scientific.net/SSP.121-123.983
Citation
J. K. Lee, H. C. Jung, D. S. Seo, H. Kim, K. H. Hwang, "Preparation of β-TCP/TiO2 Composite by Hot-Pressing", Solid State Phenomena, Vols. 121-123, pp. 983-986, 2007
Online since
March 2007
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Zong Wei Niu, Jian Hua Zhang, Sheng Feng Ren, Li Li, Min Gang Xu
Abstract:Theory calculation result indicates that the maximal critical content of SiCw in hydroxyapatite-SiCw composite bioceramics is 23.7%....
206
Authors: K. Sato, Sawao Honda, T. Nishikawa, Hideo Awaji
Abstract:Porous NiZrO2 has been widely used as anode in SOFC. However, it has been reported that there was reduction in cell performance at high...
705
Authors: Qian Feng, Shao Ming Dong, Yu Sheng Ding, Qing Zhou, Akira Kohyama
Abstract:Chopped fiber and a hybrid reinforcement of chopped and continuous fibers were used for fabricating SiC/SiC composites. Under the selected...
1257
Authors: Hua Zhang Zhai, Hong Nian Cai, Xiao Zhan Yang, Jian Bao Li, Gang Feng Guo, Chuan Bao Cao
Abstract:A series of BN-SiO2 composite ceramics with high relative densities have been fabricated by hot pressing of a mixture of hexagonal boron...
1426
Authors: Xin Yan Yue, Jian Jun Wang, Qi Sun, Hong Qiang Ru
Chapter 2: Engineering Ceramics and Ceramic Composites
Abstract:SiC-TiB2 composite was prepared at 2298 K by using pressureless sintering. The microstructures and mechanical properties of the SiC-TiB2...
812