关键词: 矿化模拟, 羟基磷灰石, 含硅钙磷酸盐

This work bases on mineralization mechanism of guano layer cellophane, profiting from the sol- gelatin law that usually selects the high chemical activity material during the procedure, engaged in a new method research preparing the hydroxyl apatite under the normal temperature and atmospheric pressure condition (HA). Considered that the guano layer apatite contains silicon, we introduce a small amount of TEOS when prepare the sol. The fields launch scanning electron microscope (SEM), the X-ray energy dispersion spectrometer (SEM-EDAX) and so on instrumental analyses indicate that the surface of white marble stone is firmly combined of dense and orderly structure of calcium phosphate film with silicon component. The craft takes ethylene of CaO glycol solution and ethanol of P2O5 solution as precursors and the entire preparation process carries on under the condition of normal temperature and pressure. Also, the process does not need to adjust the pH value and is of simple. Acid resistances, reinforcement and so on hydrophobic are carried to test the thin film. Conductivity analysis shows that this film can sustain pH＝3～4 of hydrochloric acid erosion. The reinforcement is enhanced 8.5 times comparing to the blank by the means of compressive strength and hydrophobic basically unchanged. Using this method of preparation of calcium phosphate with silicon component has a good protective effect against decency, suitable for large-scale operation. This work has provided ideas to develop the new protection material of stone cultural relic, building material as well as rock body.

Key words: mineralization simulation, hydroxyl apatite, calcium phosphate with silicon component