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Boron nitride nanotube dielectric network enhanced ZrB2-based ultra-high-temperature ceramic wave-absorbing material and preparation method thereof
The invention discloses a boron nitride nanotube dielectric network enhanced ZrB2-based ultra-high-temperature ceramic wave-absorbing material and a preparation method thereof, and belongs to the technical field of wave-absorbing materials. The ultrahigh-temperature ceramic wave-absorbing material is prepared from a ZrB2 precursor and a boron nitride nanotube, the cracking product of the ZrB2 precursor is spherical ZrB2 particles, and the spherical ZrB2 particles form a matrix; and the boron nitride nanotubes are distributed in the matrix in a net shape. Wherein part of the boron nitride nanotubes are inserted into the ZrB2 particles, and a heterogeneous interface exists between the boron nitride nanotubes and the matrix. The introduced boron nitride nanotubes are distributed in the matrix in a net shape, so that the movement and transition of electrons are effectively prevented, the conductivity of the composite material is reduced, the dielectric constant and impedance matching of PDC-ZrB2 are optimized, the wave-absorbing performance of the composite material is improved, and the selection range of wave-absorbing materials in the high-temperature field is widened; the technical problem of impedance mismatch when polymer converted ZrB2 ceramic is used as a wave-absorbing material at present is solved.
本发明公开了一种氮化硼纳米管介电网络增强的ZrB2基超高温陶瓷吸波材料及其制备方法，属于吸波材料技术领域。超高温陶瓷吸波材料由ZrB2前驱体和氮化硼纳米管制备而成；ZrB2前驱体的裂解产物为球状的ZrB2颗粒，球状的ZrB2颗粒组成基体；氮化硼纳米管在基体中呈网状分布。其中，部分所述氮化硼纳米管穿插于ZrB2颗粒中，氮化硼纳米管与基体之间存在异质界面。本发明引入的氮化硼纳米管在基体中成网状分布，有效阻止了电子的移动和跃迁，降低了复合材料电导率，优化了PDC‑ZrB2的介电常数与阻抗匹配，提高了其吸波性能，拓宽了在高温领域中对于吸波材料的选择，解决了目前聚合物转化ZrB2陶瓷作为吸波材料应用时阻抗失配的技术问题。
Boron nitride nanotube dielectric network enhanced ZrB2-based ultra-high-temperature ceramic wave-absorbing material and preparation method thereof
The invention discloses a boron nitride nanotube dielectric network enhanced ZrB2-based ultra-high-temperature ceramic wave-absorbing material and a preparation method thereof, and belongs to the technical field of wave-absorbing materials. The ultrahigh-temperature ceramic wave-absorbing material is prepared from a ZrB2 precursor and a boron nitride nanotube, the cracking product of the ZrB2 precursor is spherical ZrB2 particles, and the spherical ZrB2 particles form a matrix; and the boron nitride nanotubes are distributed in the matrix in a net shape. Wherein part of the boron nitride nanotubes are inserted into the ZrB2 particles, and a heterogeneous interface exists between the boron nitride nanotubes and the matrix. The introduced boron nitride nanotubes are distributed in the matrix in a net shape, so that the movement and transition of electrons are effectively prevented, the conductivity of the composite material is reduced, the dielectric constant and impedance matching of PDC-ZrB2 are optimized, the wave-absorbing performance of the composite material is improved, and the selection range of wave-absorbing materials in the high-temperature field is widened; the technical problem of impedance mismatch when polymer converted ZrB2 ceramic is used as a wave-absorbing material at present is solved.
本发明公开了一种氮化硼纳米管介电网络增强的ZrB2基超高温陶瓷吸波材料及其制备方法，属于吸波材料技术领域。超高温陶瓷吸波材料由ZrB2前驱体和氮化硼纳米管制备而成；ZrB2前驱体的裂解产物为球状的ZrB2颗粒，球状的ZrB2颗粒组成基体；氮化硼纳米管在基体中呈网状分布。其中，部分所述氮化硼纳米管穿插于ZrB2颗粒中，氮化硼纳米管与基体之间存在异质界面。本发明引入的氮化硼纳米管在基体中成网状分布，有效阻止了电子的移动和跃迁，降低了复合材料电导率，优化了PDC‑ZrB2的介电常数与阻抗匹配，提高了其吸波性能，拓宽了在高温领域中对于吸波材料的选择，解决了目前聚合物转化ZrB2陶瓷作为吸波材料应用时阻抗失配的技术问题。
Boron nitride nanotube dielectric network enhanced ZrB2-based ultra-high-temperature ceramic wave-absorbing material and preparation method thereof
一种氮化硼纳米管介电网络增强的ZrB2基超高温陶瓷吸波材料及其制备方法
LI HEJUN (Autor:in) / DAI MENGYU (Autor:in) / JIA YUJUN (Autor:in) / LIU SIJIAN (Autor:in) / REN BIN (Autor:in) / DENG YUMENG (Autor:in) / WANG XI (Autor:in) / HU JISHENG (Autor:in)
26.07.2024
Patent
Elektronische Ressource
Chinesisch
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