【摘要】 为了研究复合转晶剂对磷建筑石膏晶体转晶效果的影响,选用酒石酸钾钠、醋酸镁、硫酸铝、硫酸铝钾4种转晶剂,通过单掺、复掺的方式与磷建筑石膏相互作用,从吸附能、失电子能力、表面能的角度,利用吸附模型分析了转晶作用机理。结果表明:酒石酸钾钠的调晶效果优于醋酸镁;硫酸铝钾的调晶效果优于硫酸铝;当硫酸铝掺0. 15%、酒石酸钾钠掺0. 03%二者协同作用于磷建筑石膏中时,试块抗压、抗折强度最大,分别为22. 31 MPa和6. 44 MPa。转晶剂复合作用时,硫酸铝较硫酸铝钾可以提供更多的Al³⁺,有助于羧基间距更大的酒石酸钾钠同时与Ca²⁺和Al³⁺吸附配位,形成网状络合有机大分子,使晶面的稳定性提高,减缓了晶体在C轴的生长速度。更多还原

【Abstract】 To investigate the effect of composition medium crystal agent on the crystal transition of gypsum crystals,in the present study,use of potassium sodium tartrate,magnesium acetate,aluminum sulfate,aluminum potassium sulfate 4 crystal modifier as the research object,through the single-doped,complex doped way and the interaction of phosphorus building gypsum,from the perspective of adsorption energy,electron loss ability and surface energy,the mechanism of crystal growth was analyzed by adsorption model. The results show that potassium tartrate crystallization effect is better than magnesium acetate; the crystallization of aluminum potassium sulfate is better than aluminum sulfate; Phosphate building plaster added 0. 15% aluminum sulfate and 0. 03% potassium sodium tartrate,the maximum compressive strength and flexural strength of the test block are 22. 31 MPa and 6. 44 MPa,respectively. Aluminum sulphate provides more Al³⁺ ions than potassium aluminum sulphate,it contribute to adsorption between potassium sodium tartrate and Ca²⁺ or Al^{3 +},the reticular organic macromolecules improved the stability of the crystal surface and slowed down the crystal growth rate in the C axis.更多还原