Α β-tricalcium phosphate target was employed to decrease the annealing temperature for crystalline hydroxyapatite coating through a hydrolysis process by pulsed-laser deposition. The crystalline hydroxyapatite content of calcium phosphate coating layers was quantitatively evaluated using Raman spectroscopy and X-ray diffraction, and compared with that of pure polycrystalline powder. Calcium phosphate changes from an amorphous phase to crystalline hydroxyapatite through a crystalline α-tricalcium phosphate phase at around 400 C under an H₂O vapor pressure of 0.1Torr. The crystalline hydroxyapatite content increases steeply by hydrolysis at 500 C as the H₂O vapor pressure is increased from vacuum to 0.15Torr, but then decreases somewhat at higher pressure. These results indicate that excessive gas pressure blocks small ablated particles such as atoms, ions, molecules, and clusters that would typically be completely hydrolyzed instantaneously following deposition on the substrate.

Α β是采用磷酸三钙目标通过脉冲激光沉积水解过程以降低退火温度为结晶性羟基磷灰石涂层。使用拉曼光谱和 X 射线衍射定量评估磷酸钙涂层的结晶羟基磷灰石含量，并与纯多晶粉末进行比较。在约 400°C和 0.1Torr的 H ₂ O 蒸气压下，磷酸钙从无定形相通过结晶α-磷酸三钙相转变为结晶羟基磷灰石。结晶羟基磷灰石含量通过在 500 C 水解而急剧增加，因为 H ₂O 蒸气压从真空增加到 0.15Torr，但随后在较高压力下略有下降。这些结果表明，过高的气压会阻挡小颗粒，例如原子、离子、分子和团簇，这些颗粒通常会在沉积在基板上后立即完全水解。