稀有金属材料与工程
稀有金屬材料與工程
희유금속재료여공정
RARE METAL MATERIALS AND ENGINEERNG
2009年
z2期
483-486
,共4页
王洪全%廖家轩%潘笑风%傅向军%张佳%魏雄邦
王洪全%廖傢軒%潘笑風%傅嚮軍%張佳%魏雄邦
왕홍전%료가헌%반소풍%부향군%장가%위웅방
溶胶-凝胶%复合%钡铁氧体%钛酸钡%吸波性能
溶膠-凝膠%複閤%鋇鐵氧體%鈦痠鋇%吸波性能
용효-응효%복합%패철양체%태산패%흡파성능
sol-gel%composite%barium ferrites%barium titanate%microwave absorption properties
采用溶胶凝胶法制备了钛酸钡(BaTiO_3, BTO)和钡铁氧体(BaFe_(12)O_(19), BFO)复合粉体.研究了该粉体的结晶情况、相结构、形貌及吸波性能.XRD结果表明,复合粉体的相结构与BFO粉体的相结构接近,但与BTO含量和烧结温度密切相关.SEM结果表明,复合粉体由微米晶粒和纳米晶粒组成,随着烧结温度的升高颗粒尺寸增大.吸波性能测试表明,粉体在500 MHz～18 GHz频率范围有多个吸收峰,BTO的加入明显改善了材料的吸波性能.
採用溶膠凝膠法製備瞭鈦痠鋇(BaTiO_3, BTO)和鋇鐵氧體(BaFe_(12)O_(19), BFO)複閤粉體.研究瞭該粉體的結晶情況、相結構、形貌及吸波性能.XRD結果錶明,複閤粉體的相結構與BFO粉體的相結構接近,但與BTO含量和燒結溫度密切相關.SEM結果錶明,複閤粉體由微米晶粒和納米晶粒組成,隨著燒結溫度的升高顆粒呎吋增大.吸波性能測試錶明,粉體在500 MHz～18 GHz頻率範圍有多箇吸收峰,BTO的加入明顯改善瞭材料的吸波性能.
채용용효응효법제비료태산패(BaTiO_3, BTO)화패철양체(BaFe_(12)O_(19), BFO)복합분체.연구료해분체적결정정황、상결구、형모급흡파성능.XRD결과표명,복합분체적상결구여BFO분체적상결구접근,단여BTO함량화소결온도밀절상관.SEM결과표명,복합분체유미미정립화납미정립조성,수착소결온도적승고과립척촌증대.흡파성능측시표명,분체재500 MHz～18 GHz빈솔범위유다개흡수봉,BTO적가입명현개선료재료적흡파성능.
BaFe_(12)O_(19)/BaTiO_3 (BFO/BTO) composite powder was prepared by Sol-gel method. Crystallization, phase structure, morphologies and microwave absorption properties of the composite powder were studied. X-ray diffraction shows that the composite powder is near to BFO powder in phase structure, which is closely associated with the content of BTO and the sintering temperature. SEM analysis exhibits that the composite powder is composed of micro-crystals and nano-crystals. The crystal size increases with increasing sintering temperature. There are several microwave absorption peaks in the range of 500MHz and 18GHz, which shows the microwave absorption properties were improved significantly.
