以三乙醇胺硼酸酯为前驱体制备大颗粒六方氮化硼

The Synthesis of Large Hexagonal Boron Nitride Particles using Triethanolamine Borate as Precursor

摘要:

以三乙醇胺和硼酸为原料，甲苯为带水剂，合成了三乙醇胺硼酸酯，在最佳工艺条件下以三乙醇胺硼酸酯为前驱体在氨气气氛中烧结制得六方氮化硼颗粒。采用IR、XRD、SEM、NMR等测试方法对中间物和产物进行了表征，确定了中间物及产物的组成、物相、粒度及形貌。研究结果表明：以三乙醇胺硼酸酯为前驱体在1200℃烧结4h，可制得高纯度、晶型良好，粒径在20μm左右的六方氮化硼颗粒。经过高温精制后的六方氮化硼颗粒具有较高的结晶度和致密度，其粒径可以达到30μm以上，纯度为98.5%。

Abstract:

The triethanolamine borate was synthesized by triethanolamine reacting with boric acid and using toluene as water carrying agent. The h-BN particles were prepared by sintering triethanolamine borate as precursor in ammonia gas atmosphere. The precursor and product were respectively characterized by IR, XRD, SEM and NMR analyses. The results indicated that the precursor is treated at 1200℃ for 4h to receive high purity and good crystals of h-BN particles with a average particle size of 20μm. After high-temperature refining of h-BN particles with high crystallinity and compactness, the particle size can reach more than 30μm and 98.5% purity can be obtained.