Method for preparing BCNO fluorescent powder by sintering precursors at low temperature

The invention relates to a method for preparing the BCNO fluorescent powder by sintering precursors at low temperature. The method comprises the following steps: step 1, heating 37% formaldehyde solution to 60-67 DEG C, and then adding melamine to stir until the solution is clear; step 2, adding trimethyl borate into the solution which is obtained in step 1, adding triethanolamine to adjust the pH value of the solution to be between 8-10 after the solution is clear; and step 3, sintering the BCNO precursors at 550-750 DEG C for 20-30 hours, and then, carrying out air cooling to room temperature to grind, and thus obtaining the BCNO fluorescent powder. According to the method for preparing the BCNO fluorescent powder by sintering precursors at low temperature, use of urea is prevented, the emission spectrum of the fluorescent powder can be adjusted in a visible light range through the method of adjusting the sintering temperature, formaldehyde usage and trimethyl borate usage, the adopted equipment is simple and low in cost, and the method is simple and practicable and is easy for mass production.

本发明涉及一种低温烧结前驱体来制备BCNO荧光粉的方法。该方法包括以下步骤：步骤1，将37%的甲醛溶液加热至60 - 67℃，然后加入三聚氰胺并搅拌直至溶液澄清；步骤2，向步骤1所得溶液中加入硼酸三甲酯，待溶液澄清后加入三乙醇胺将溶液的pH值调节至8 - 10；步骤3，将BCNO前驱体在550 - 750℃下烧结20 - 30小时，然后空冷至室温并研磨，从而得到BCNO荧光粉。根据这种低温烧结前驱体来制备BCNO荧光粉的方法，避免了使用尿素，通过调节烧结温度、甲醛用量和硼酸三甲酯用量的方法可在可见光范围内调节荧光粉的发射光谱，所采用的设备简单且成本低，该方法简单可行且易于大规模生产。