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摘要: 以31P核为探针对具有不同摩尔比(x,y)的xLi2O·P2O5·yCdO玻璃样品进行了核磁共振研究。通过Bruker MSL-300谱仪得到了静态核磁共振谱,工作频率为121.487MHz。在玻璃中,三种基本类型的磷结构组元随机地连在一起形成网络,每种组无有自己的核磁共振特征,基本结构组元的相对含量依赖于Li2O和CdO的摩尔比,即依赖于x和y。为了描述组元的含量,我们提出了一个简洁的模型,它的合理性已被其预言结果与对实验观测核磁共振粉末谱的拟谱结论的一致性所证实。
Abstract: 31P nuclei are used as probes in the NMR studies of xLi2O·P2O5·yCdO glass samples with different molar ratio (x, y). The static NMR spectra are obtained through employing the Bruker MSL-300 spectrometer with a operating frequency of 121.487 MHz. Three basic types of phosphorous structure units join together randomly to form networks in the glasses, each of which has its own NMR characteristic. The relative portions of those basic structure units depend on the molar contents of Li2O and CdO, i,e x and y. For the description of the unit portions, we have postulated a simple model, the rationality of which has been justified by the coincidence between the theoretical prediction based on the model and the conclusions obtained from the simulation of the observed NMR powder patterns.