摘要
分别使用有机溶胶-凝胶以及无机溶胶作为羟基磷灰石（HA）前驱体，利用浸渍涂层（Dip-coating）技术在钛表面制备纳米超薄薄膜。利用扫描电镜（SEM）和X射线衍射（XRD）表征薄膜形态、微晶尺寸分布（D）和微观应变（ε）。结果表明：在大于400℃热处理后，薄膜开始呈现磷灰石结构；在400℃～600℃范围内，热处理温度对两种磷灰石薄膜D和ε的影响显著；SEM结果证明HA前驱体种类严重影响两种纳米HA薄膜的颗粒团聚尺寸；有机溶胶-凝胶和无机凝胶在钛表面制备的HA薄膜颗粒团聚尺寸分别为25nm和100nm，薄膜厚度分别为2．5μm和5．0μm。浸渍涂层技术制备的HA薄膜表面／界面形态完整，薄膜表面无明显微裂纹。
Present study used dip-coating techniques to fabricate uhrathin nano-HA coating on titanium in organic sol-gel of Ca（NO3）2·4H2O and PO（CH3）3 and inorganic sol-gel of Ca（NO3）2·4H2O and （NH4）2HPO4. Scanning electron microscope （SEM） and grazing-incidence X-ray diffraction （XRD） were used to observe the morphology and distribution of crystallite size （D）and lattice strain （ε）of ultrathin nano-HA coating. After heated at 400℃, the apatite structure of coatings on titanium began to appear. At beating temperature of 400℃-600℃, the effect of beating temperature on D and ε of both coatings was obvious. Precursor types significantly affected the particle diameters of nano-HA coatings, which were 25-40 nm for organic sol-gel and about 100 nm for inorganic sol. The thickness of uhrathin nano-HA coatings was 2.5μm for organic sol-gel and 5μm for inorganic sol and morphology of interfaces between coating and titanium was intact and homogenous.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2006年第5期1075-1079,共5页
Journal of Biomedical Engineering
关键词
浸渍-薄膜
溶胶-凝胶
羟基磷灰石
X衍射
微晶尺寸分配
微观应变
Dip-coating Sol-gel Hydroxyapatite （HA） X-ray diffraction （XRD） Distribution of crystallite size Micro-strain
