助熔剂对陶瓷化硼酚醛复合材料热行为及微观结构的影响
发布时间：2018-12-14 11:49
【摘要】：以硼酚醛树脂(BPF)为基体,以纳米MgO、Al_2O_3和SiO_2(MAS)为成瓷填料,添加B_2O_3、Bi_2O_3或玻璃料等助熔剂,采用模压成型工艺制备MgO-Al_2O_3-SiO_2/硼酚醛(MAS/BPF)陶瓷化复合材料,研究助熔剂对MAS/BPF陶瓷化复合材料热稳定性、微观结构和物相转变的影响。结果表明:MAS/BPF陶瓷化复合材料在600~1000℃裂解2h后的尺寸收缩率为9%~14.5%,表现出良好的尺寸稳定性;TG热分析发现,助熔剂使MAS/BPF陶瓷化复合材料在1200℃时的残留率降低,但在900~1200℃的热稳定性提高。XRD和SEM分析结果显示,助熔剂能够显著降低陶瓷化反应温度。和B_2O_3、Bi_2O_3相比,玻璃料更有助于形成大量的液相,促进陶瓷化组分与裂解残余碳之间的反应,从而提高MAS/BPF陶瓷化复合材料在高温下的致密性和外形完整性。
[Abstract]:Boron phenolic resin (BPF) was used as substrate, nano-sized MgO,Al_2O_3 and SiO_2 (MAS) were used as ceramic fillers, and B _ 2O _ 3 / Bi2O3 or glass fluxes were added. MgO-Al_2O_3-SiO_2/ boron phenolic (MAS/BPF) ceramic composites were prepared by moulding process. The effects of fluxes on the thermal stability, microstructure and phase transition of MAS/BPF ceramic composites were studied. The results show that the size shrinkage of MAS/BPF ceramic composites is 9? 14.5 after cracking at 600 鈩，
本文编号：2378564
[Abstract]:Boron phenolic resin (BPF) was used as substrate, nano-sized MgO,Al_2O_3 and SiO_2 (MAS) were used as ceramic fillers, and B _ 2O _ 3 / Bi2O3 or glass fluxes were added. MgO-Al_2O_3-SiO_2/ boron phenolic (MAS/BPF) ceramic composites were prepared by moulding process. The effects of fluxes on the thermal stability, microstructure and phase transition of MAS/BPF ceramic composites were studied. The results show that the size shrinkage of MAS/BPF ceramic composites is 9? 14.5 after cracking at 600 鈩，
本文编号：2378564
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