欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
以低活性含硅聚硼氮烷为先驱体,经熔融纺丝,BCl3脱硅不熔化处理以及在氨气气氛中高温裂解制备的氮化硼纤维仍含有硅元素,这主要是含硅聚硼氮烷结构中的B-N（SiMe3）2和B-N（SiMe3）-B由于位阻与BCl3反应脱除SiMe3不完全所致.而采用HCl首先与含硅聚硼氮烷反应减少其位阻,再通过BCl3进一步脱硅不熔化处理制备的氮化硼陶瓷纤维经FT-IR、X射线衍射（XRD）分析表明纤维基本不含硅元素,并且扫描电子显微镜（SEM）表明得到的氮化硼陶瓷纤维直径约为11μm,断面致密无孔,室温下抗拉强度为0.45 GPa.
英文摘要：
ilicon still exists in boron nitride（BN） ceramic fibers which were prepared by melt-spinning,curing with BCl3 and pyrolysis under NH3 of a preceramic silicon-containing polyborazine.That is because B-N（SiMe3）2 and B-N（SiMe3）-B could not react with BCl3 completely for the steric hindrance.So HCl was used to react with silicon-containing polyborazine first to reduce its steric hindrance.Then,BCl3 reacted with silicon-containing polyborazine to remove the residual SiMe3.After pyrolysis under NH3,BN ceramic fibers without silicon were obtained which was proved by FT-IR and X-ray diffraction.The obtained BN ceramic fibers with diameter of about 11 μm were dense which was demonstrated by scanning electron mi-croscopy（SEM） and the fibers showed room temperature mechanical property with average tensile strength of 0.45 GPa.
同期刊论文项目
同项目期刊论文
Effect of molecular monomer structure on the composition and properties of BN via the preceramic pol
Performance and structural evolution of high-temperature organic adhesive for joining Al2O3 ceramics
Synthesis, characterization and ceramization of a novel vinyl-rich liquid precursor for Si(O)C ceram
Axial graded silicon carbide fibers with fluctuating carbon layer and sinusoidal electrical resistiv
Axial graded silicon carbidefibers withfluctuating carbon layer and sinusoidal electrical resistivit
Synthesis, Characterization and Ceramization of a Liquid Hyperbranched Polycarbosilane with Vinyl Gr
Whole ceramic-like microreactors from inorganic polymers for high temperature or/and high pressure c
A pressure-tolerant polymer microfluidic device by the simultaneous solidification-bonding method an
Synthesis and pyrolysis of a novel preceramic polymer PZMS from PMS to fabricate high-temperature-re
Preparation of hollow Si-B-N ceramic fibers by partial curing and pyrolysis of polyborosilazane fibe
Synthesis of a novel preceramic polymer (V-PMS) and its performance in heat-resistant organic adhesi
Oxidation Resistance and Dielectrical Properties of Boron Nitride by Pyrolysis of Poly (isopropylami
Preparation and performance of a heat-resistant organic adhesive obtained via a liquid SiC precursor
期刊信息
位置：