This study reports a simple and low‐cost synthetic route for preparing SiBCN ceramic powder via pyrolysis of boron‐modified cyclotrisilazane (BCTS). BCTS resins were synthesized by reacting boric acid with 1, 3, 5‐trimethyl‐1′, 3′, 5′‐trivinylcyclotrisilazane (CTS) in the molar ratio of 1:1, 1:3, and 1:5. The boron modification in CTS resin resulted in optimum properties for preceramic polymers such as solubility in common solvents, processable viscosity (<20 cps) and high ceramic yield (>80 wt. %). The polymer to ceramic conversion was carried out at 1450 and 1650°C under a nitrogen atmosphere. The study demonstrated that the changes in CTS concentration and pyrolysis temperature significantly affected the evolution of ceramic phases, morphology, and elemental composition which were thoroughly investigated through XRD, SEM, and HRTEM techniques. The results revealed the formation of β‐SiC, β‐Si₃N₄, and oxide ceramic phases with BCTS in the molar ratio of 1:1 and 1:3; whereas, β‐SiC, β‐Si₃N₄, and turbostratic BN(C) ceramic phases were obtained with BCTS in the molar ratio of 1:5.

中文翻译：

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用硼改性的环三硅氮烷生产SiBCN陶瓷粉末的简单且低成本的合成路线

这项研究报告了一种通过硼改性的环三硅氮烷（BCTS）的热解制备SiBCN陶瓷粉末的简单且低成本的合成途径。通过使硼酸与摩尔比为1：1、1：3和1：5的1、3、5-三甲基-1'，3'，5'-三乙烯基环三硅氮烷（CTS）反应来合成BCTS树脂。CTS树脂中的硼改性导致陶瓷陶瓷聚合物具有最佳性能，例如在普通溶剂中的溶解度，可加工粘度（<20 cps）和高陶瓷产率（> 80 wt。％）。在氮气气氛下，在1450和1650℃下进行聚合物到陶瓷的转化。研究表明，CTS浓度和热解温度的变化显着影响了陶瓷相，形态和元素组成的演变，并通过XRD，SEM和XRD进行了深入研究。和HRTEM技术。结果揭示了β-SiC，β-Si的形成₃ N ₄和具有BCTS的摩尔比为1：1和1：3的氧化物陶瓷相；而，的β-SiC，β型Si ₃ Ñ ₄，和乱层BN（C）以1摩尔比旅战斗队得到的陶瓷相：5。