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用X射线衍射、激光拉曼光谱以及等离子体原子发射光谱等技术研究了电化学沉积钙磷陶瓷过程中 ,电流密度对电沉积层组成和结构的影响 .实验表明阴极表面得到的沉积物是几种钙磷盐组成的混合物 ,且其成份随电流密度的改变而发生较大的变化 .在电解液温度为 75℃条件下 ,当控制电流密度较低时 ,沉积层主要由CaHPO4· 2H2 O (DCPD)和Ca8H2 (PO4) 6· 5H2 O (OCP)组成 ;随着电流密度的增加 ,阴极表面逐渐生成Ca3 (PO4) 2 ·nH2 O (TCP)和Ca10 (PO4) 6(OH) 2 (HAP) .当电流密度大于 5mA/cm2 时 ,电沉积层的主要成份为羟基磷灰石 (HAP) .
The effect of current density on the composition and structure of the electrodeposited layer during electrochemical deposition of calcium phosphate ceramics was investigated by X-ray diffraction, laser Raman spectroscopy and plasma atomic emission spectroscopy. The experiments show that the deposit on the cathode surface is a few And its composition changes greatly with the change of current density.When the electrolyte current is 75 ℃, when the control current density is low, the deposited layer is mainly composed of CaHPO4 · 2H2O ( DCPD) and Ca8H2 (PO4) 6 · 5H2O (OCP). With the increase of current density, Ca3 (PO4) 2 · nH2 O (TCP) and Ca10 (PO4) 6 (OH) 2 When the current density is more than 5mA / cm2, the main component of electrodeposited layer is hydroxyapatite (HAP).