在凝胶体系中系统研究了温度对CaOxa晶体生长的影响.首先,温度影响CaOxa晶体的晶相组成.随着温度从67℃降低至7℃,COM晶体的质量分数从100%减少至47%,二水草酸钙(COD)晶体质量分数从0增加至53%,COD的质量分数对温度的倒数(1/t)具有线性关系;第二,温度影响CaOxa晶体的形貌.随着温度降低,拉长六边形状的一水草酸钙(COM)晶体逐渐减少,蔷薇花状COM聚集体质量分数增加,而COD晶体则从四方锥形变为十字形晶体;第三,温度影响CaOxa晶体的生长速率.随着温度降低,CaOxa的生长速度减小.
The effects of temperature on the phase composition,morphology and growth rate of calcium oxalate(CaOxa) crystals were systematically investigated in silica gel system using scanning electron microscopy(SEM) and powder X-ray diffraction(XRD).Temperature affected the phase compositions of CaOxa crystals.As the temperature decreased,the percentage of COD increased.The logarithm of the percentage of calcium oxalate dihydrate(COD) formed at a certain temperature(t) was proportional to the reciprocal of temperat...