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通过对钙磷镁肥(FCMP)的TMS—GC法分析证明:FCMP中硅是以较小的聚阴离子存在;磷与硅形成聚合阴离子或少量 (PO)_4~(3-)存在。硅网络大小在碱度较高的FCMP体系中不是决定转化率的主要因素;硅磷聚合使其Ca_5F(PO_4)_3晶体出能垒增加一个或两个Si—O键能量值。
The results of TMS-GC analysis of calcium-magnesium-phosphate fertilizer (FCMP) showed that the silicon in FCMP was present as a small polyanion; the phosphorus and silicon formed a polymeric anion or a small amount of (PO) _4 ~ (3-). The size of silicon network is not the main factor that determines the conversion rate in the FCMP system with high alkalinity. The polymerization of silicon and phosphorus increases the energy barrier of Ca_5F (PO_4) _3 crystal by one or two Si-O bond energy.