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High-carbon-content silicon-boron-carbon-nitrogen ceramic fiber as well as preparation method and application thereof
The invention provides a high-carbon-content silicon-boron-carbon-nitrogen ceramic fiber and a preparation method and application thereof.The preparation method of the ceramic fiber comprises the following steps that chlorosilane, boron trichloride and MMN serve as raw materials, liquid polyborosilazane is prepared firstly, then a reaction is conducted at the temperature of 150-220 DEG C to obtain a solid polyborosilazane polymer, and the solid polyborosilazane polymer is subjected to heat treatment to obtain the high-carbon-content silicon-boron-carbon-nitrogen ceramic fiber. A solid polyborosilazane polymer is subjected to melt spinning and non-melting treatment to obtain the high-carbon-content silicon-boron-carbon-nitrogen ceramic fiber, the carbon content of the silicon-boron-carbon-nitrogen ceramic fiber is 30-45%, the temperature resistance of the silicon-boron-carbon-nitrogen ceramic fiber reaches 1500 DEG C, the absorption rate of the silicon-boron-carbon-nitrogen ceramic fiber to a radar wave band is larger than-10 dB in an X wave band (8-12 GHz), and the absorption rate of the silicon-boron-carbon-nitrogen ceramic fiber to the radar wave band is larger than-10 dB. The silicon-boron-carbon-nitrogen ceramic fiber can be used as an excellent reinforcement of a ceramic fiber reinforced wave-absorbing type ceramic matrix composite material, and when the composite material is used for a high-temperature part of military equipment, the silicon-boron-carbon-nitrogen ceramic fiber can absorb radar waves and is prevented from being detected by enemy radars, so that a relatively good stealth effect is achieved.
本发明提供一种高碳含量硅硼碳氮陶瓷纤维及其制备方法和应用，该陶瓷纤维的制备方法如下以氯硅烷、三氯化硼和MMN为原料，先制备液态聚硼硅氮烷，然后在150～220℃的温度下反应得到固态聚硼硅氮烷聚合物，将固态聚硼硅氮烷聚合物进行熔融纺丝、不熔化处理得到高碳含量硅硼碳氮陶瓷纤维，所述硅硼碳氮陶瓷纤维的碳含量为30～45％，硅硼碳氮陶瓷纤维的耐温达到1500℃，在X波段(8～12GHz)，对雷达波段的吸收率大于‑10dB，可以作为陶瓷纤维增强吸波型陶瓷基复合材料的优良增强体，该复合材料用于军事设备的高温部位时，硅硼碳氮陶瓷纤维能够吸收雷达波，避免被敌方雷达所探测，达到较好的隐身效果。
High-carbon-content silicon-boron-carbon-nitrogen ceramic fiber as well as preparation method and application thereof
The invention provides a high-carbon-content silicon-boron-carbon-nitrogen ceramic fiber and a preparation method and application thereof.The preparation method of the ceramic fiber comprises the following steps that chlorosilane, boron trichloride and MMN serve as raw materials, liquid polyborosilazane is prepared firstly, then a reaction is conducted at the temperature of 150-220 DEG C to obtain a solid polyborosilazane polymer, and the solid polyborosilazane polymer is subjected to heat treatment to obtain the high-carbon-content silicon-boron-carbon-nitrogen ceramic fiber. A solid polyborosilazane polymer is subjected to melt spinning and non-melting treatment to obtain the high-carbon-content silicon-boron-carbon-nitrogen ceramic fiber, the carbon content of the silicon-boron-carbon-nitrogen ceramic fiber is 30-45%, the temperature resistance of the silicon-boron-carbon-nitrogen ceramic fiber reaches 1500 DEG C, the absorption rate of the silicon-boron-carbon-nitrogen ceramic fiber to a radar wave band is larger than-10 dB in an X wave band (8-12 GHz), and the absorption rate of the silicon-boron-carbon-nitrogen ceramic fiber to the radar wave band is larger than-10 dB. The silicon-boron-carbon-nitrogen ceramic fiber can be used as an excellent reinforcement of a ceramic fiber reinforced wave-absorbing type ceramic matrix composite material, and when the composite material is used for a high-temperature part of military equipment, the silicon-boron-carbon-nitrogen ceramic fiber can absorb radar waves and is prevented from being detected by enemy radars, so that a relatively good stealth effect is achieved.
本发明提供一种高碳含量硅硼碳氮陶瓷纤维及其制备方法和应用，该陶瓷纤维的制备方法如下以氯硅烷、三氯化硼和MMN为原料，先制备液态聚硼硅氮烷，然后在150～220℃的温度下反应得到固态聚硼硅氮烷聚合物，将固态聚硼硅氮烷聚合物进行熔融纺丝、不熔化处理得到高碳含量硅硼碳氮陶瓷纤维，所述硅硼碳氮陶瓷纤维的碳含量为30～45％，硅硼碳氮陶瓷纤维的耐温达到1500℃，在X波段(8～12GHz)，对雷达波段的吸收率大于‑10dB，可以作为陶瓷纤维增强吸波型陶瓷基复合材料的优良增强体，该复合材料用于军事设备的高温部位时，硅硼碳氮陶瓷纤维能够吸收雷达波，避免被敌方雷达所探测，达到较好的隐身效果。
High-carbon-content silicon-boron-carbon-nitrogen ceramic fiber as well as preparation method and application thereof
一种高碳含量硅硼碳氮陶瓷纤维及其制备方法和应用
LUO YONGMING (author) / CHEN CHUTONG (author) / XU CAIHONG (author) / ZHANG ZONGBO (author) / LI YONGMING (author)
2022-11-15
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
C09K
Materialien für Anwendungen, soweit nicht anderweitig vorgesehen
,
MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR
/
D01F
Chemische Gesichtspunkte bei der Herstellung von produzierten Filamenten, Zwirnen, Fasern, Borsten oder Bändern
,
CHEMICAL FEATURES IN THE MANUFACTURE OF MAN-MADE FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
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