| 替代M-型钡铁氧体纳米粒子的微波吸收性能 |
| Microwave-Absorbing Behavior of Substituted M-Type Barium Ferrite Nano-Particles |
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| 摘要: |
| 关键词: 替代M-型钡铁氧体纳米粒子 微波吸收性能 共沉淀-熔盐法 |
| 基金项目: |
| Abstract: The microwave-absorbing behavior of substituted M-type barium ferrite nano-particles was investigated. The nano-particles were synthesized with coprecipitation-melted salt method. For the purpose of comparison, corre-sponding micro-particles were also prepared through direct coprecipitation and sintering. XRD and TEM of the nano-particles showed that the ferrite was hexagonal in structure and widely distributed in size with particle size being less than 100nm, the complex permittivity and permeability of a 1.50mm thick specimen and a 1.40mm thick specimen containing 60% by weight of substituted M-type barium ferrite nano-particles and micro-particles were measured respectively in X band (8.2～12.4GHz) range, from which the reflection loss (R.L.) of microwaves was calculated and two comparative absorption curves were given. The results showed that the synthetic nano-particles could well absorb microwaves in X band. The absorption was larger than 10dB in the range of 9.2～12.4GHz while the maximum absorption was 38.6dB at 10.6GHz. |
| Keywords: substituted M-type barium ferrite nano-particles microwave-absorbing behavior coprecipitation-melted salt method |
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| 孟凡君,茹淼焱,刘爱祥,刘宗林,王新强,秦连杰.替代M-型钡铁氧体纳米粒子的微波吸收性能[J].无机化学学报,2002,18(10):1067-1070. |
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