摘要
利用湿化学合成法制备Fe^(3+)掺杂磷酸钙,并分析反应物中Fe^(3+)和Ca2+的比例对所得磷酸钙结晶度的影响。利用X射线衍射仪、扫描电子显微镜、磁强计等研究热处理对Fe^(3+)掺杂磷酸钙结构和性能的影响。结果表明,反应过程中Fe^(3+)的参与可提高磷酸钙的非晶稳定性,且随Fe^(3+)量的增加,所得磷酸钙结晶度降低。经900℃热处理2 h后,非晶磷酸钙可转变为磷酸钙、磷酸钙铁相和羟基磷灰石。随着Fe^(3+)掺入量的增加,热处理后形成的磷酸钙、磷酸钙铁相相对含量增加,而羟基磷灰石相对含量降低。热处理促进非晶磷灰石颗粒结晶长大形成球形颗粒或者短棒状结构。磁性检测结果表明Fe^(3+)取代磷酸钙具有顺磁性,经热处理后磁性显著增强。
Fe^(3+)doped calcium phosphate was fabricated by wet chemical methods and the effect of Fe^(3+)/ Ca^(2+)ratio on the crystallinity of calcium phosphate was researched. The structure and properties of Fe^(3+)doped calcium phosphate after being heat-treated at 900 ℃ for 2 h were studied by means of X-ray diffraction( XRD),scanning electron microcopy( SEM) and magnetometer( VSM). The results indicate that the participation of Fe^(3+)can increase stability of amorphous calcium phosphate and its crystallinity decreases with the increase of Fe^(3+). Amorphous calcium phosphate will be conversed into tricalcium phosphate,calcium iron phosphate and hydroxyapatite after heat treatment. And the content of tricalcium phosphate and calcium iron phosphate increases,while that of hydroxyapatite decreases with the increasing of Fe^(3+). Heat treatment can promote crystallization of amorphous calcium phosphate and form spherical particles or short rodlike structure. Magnetic testing shows that Fe^(3+)doped tricalcium phosphate is paramagnetic and its magnetism improves after heat treatment.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2015年第S2期1-5,共5页
Transactions of Materials and Heat Treatment
基金
山东省优秀中青年科学家奖励基金(BS2013CL030)
江苏省科学基金青年基金(BK20140412)
关键词
Fe3+掺杂磷酸钙
结晶度
热处理
微观结构
磁性
Fe3+ doped calcium phosphate
crystallinity
heat treatment
microstructure
magnetism
