Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, PR China.
Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, PR China; Key Laboratory of Salt Lake Resources Chemistry of Qinghai Province, Xining 810008, PR China.
Mater Sci Eng C Mater Biol Appl. 2017 Oct 1;79:894-900. doi: 10.1016/j.msec.2017.03.275. Epub 2017 Apr 27.
A novel magnesium potassium phosphate chemically bonded ceramic (MKPCBC) was prepared as a byproduct of boron-containing magnesium oxide (B-MgO) after extracting LiCO from salt lakes. In this work, the influence of glucose on the properties of MKPCBC, such as the setting time, compressive strength and hydration heat, was investigated. In addition, we studied the effect of the magnesium-phosphate ratio (M/P) and liquid-solid ratio (L/S) on the injectability of MKPCBC. The pH change in glucose modified MKPCBC paste was also investigated. The phase composition and microstructure were studied in detail by using X-ray diffraction (XRD) and scanning electron microscopy-energy dispersive spectrometry (SEM-EDS). The results show that the optimal content of glucose is 6wt%. The optimum proportions of M/P and L/S for MKPCBC are 1.5 and 0.25, respectively. The properties of the novel MPCBC can meet the requirements of biomaterials. In addition, the retardation mechanism of glucose on MKPCBC and the hydration mechanism of novel MKPCBC were studied in detail through the continuous monitoring of the phase composition and microstructure.
一种新型的镁钾磷酸盐化学结合陶瓷（MKPCBC）是从盐湖中提取 LiCO 后作为含硼氧化镁（B-MgO）的副产品制备的。在这项工作中，研究了葡萄糖对 MKPCBC 的性能（如凝结时间、抗压强度和水化热）的影响。此外，我们还研究了镁磷比（M/P）和液固比（L/S）对 MKPCBC 可注性的影响。还研究了葡萄糖改性 MKPCBC 浆体 pH 值的变化。通过 X 射线衍射（XRD）和扫描电子显微镜-能谱（SEM-EDS）详细研究了相组成和微观结构。结果表明，葡萄糖的最佳含量为 6wt%。MKPCBC 的最佳 M/P 和 L/S 比例分别为 1.5 和 0.25。新型 MPCBC 的性能可以满足生物材料的要求。此外，通过连续监测相组成和微观结构，详细研究了葡萄糖对 MKPCBC 的缓凝机制和新型 MKPCBC 的水化机制。
