用软件定标技术扩展EM－360L核磁共振谱仪的温度适应范围

利用计算机控制和数据处理技术对进口核磁共振谱仪加以改造，使其测试所需要的环境温度由原来的恒温降至室温。其精度保持不变，硬件方案捷可靠，软件利用一个标准样品的已知参数来校正系统的刻度单位，算法采用动态的可调刻度单位标定其它样品的测试结果，取得了较为理想的效果。     

Effective Route to Graphitic carbon Nitride from Ball-Milled Amorphous carbon in NH3 Atmosphere Under Annealing

Graphitic carbon nitride (g-C3N4) powders were successfully synthesized from ball-milled amorphous carbon under NH3 atmosphere at high temperature, for the first time to the best of our knowledge. The combined charac-teristic data obtained by x-ray diffraction, high-resolution transmission-electron microscopy, electron energy losss pectroscopy, Raman spectroscopy, energy dispersive spectroscopic analysis, and Fourier transformation infrared spectroscopy provide substantial evidence for the graphite-like sp^2-bonded structure with C3N4 stoichiometry.     

用软件定标技术扩展EM－360L核磁共振谱仪的温度适应范围

利用计算机控制和数据处理技术对进口核磁共振谱仪加以改造，使其测试所要求的环境温度由原来的恒温（２０±１℃）降至室温。其精度保持不变，硬件方案简捷可靠、软件利用一个标准样品的已知参数来校正系统的刻度单位，算法采用动态的可调刻度单位标定其它样品的测试结果，取得了较为理想的效果。并对影响核磁共振谱仪数据精度的因素及规律作了讨论