中国材料进展
中國材料進展
중국재료진전
MATERIALS CHINA
2012年
7期
1-9
,共9页
磁电复合材料%CCTO%NiCuZn%低温烧结
磁電複閤材料%CCTO%NiCuZn%低溫燒結
자전복합재료%CCTO%NiCuZn%저온소결
magnetoelectric composite materials%CCTO%NiCuZn%low-temperature-fired
将CCTO（CaCu3Ti4O12）与NiCuZn铁氧体进行复合，系统地研究了组分变化对这种新型磁电复合材料的烧结性能、晶相结构、显微结构和磁电性能的影响。随后，为了实现复合材料的低温烧结以及综合考虑复相陶瓷的磁电性能，选取80％（质量分数，下同）NiCuZn铁氧体／20％CCTO组分，以BBSZ（Bi2O3-H38O3-SiO2-ZnO）玻璃作为助熔剂，研究了CCTO／NiCuZn铁氧体基复合材料的烧结行为和磁电性能。结果表明，掺杂BBSZ后，900℃下烧结的所有样品的密度均达到了复相陶瓷理论密度的95％，且复相陶瓷的介电常数和磁导率在1～30MHz范围内均不依赖于频率的变化。在10MHz的频率下，当BBSZ的含量从0增加到3％时，复相陶瓷磁导率μ从13．2增加到47．9，磁损耗tanδμ从0．022下降到0．017，同时，样品的谐振频率从10^9Hz左右移动到3．2×10^8Hz。相应地，复相陶瓷的介电常数F从9．2增加到16，介电损耗tanδε从0．069下降到0．012。这一优异的整体性能使其有望实际应用。
將CCTO（CaCu3Ti4O12）與NiCuZn鐵氧體進行複閤，繫統地研究瞭組分變化對這種新型磁電複閤材料的燒結性能、晶相結構、顯微結構和磁電性能的影響。隨後，為瞭實現複閤材料的低溫燒結以及綜閤攷慮複相陶瓷的磁電性能，選取80％（質量分數，下同）NiCuZn鐵氧體／20％CCTO組分，以BBSZ（Bi2O3-H38O3-SiO2-ZnO）玻璃作為助鎔劑，研究瞭CCTO／NiCuZn鐵氧體基複閤材料的燒結行為和磁電性能。結果錶明，摻雜BBSZ後，900℃下燒結的所有樣品的密度均達到瞭複相陶瓷理論密度的95％，且複相陶瓷的介電常數和磁導率在1～30MHz範圍內均不依賴于頻率的變化。在10MHz的頻率下，噹BBSZ的含量從0增加到3％時，複相陶瓷磁導率μ從13．2增加到47．9，磁損耗tanδμ從0．022下降到0．017，同時，樣品的諧振頻率從10^9Hz左右移動到3．2×10^8Hz。相應地，複相陶瓷的介電常數F從9．2增加到16，介電損耗tanδε從0．069下降到0．012。這一優異的整體性能使其有望實際應用。
장CCTO（CaCu3Ti4O12）여NiCuZn철양체진행복합，계통지연구료조분변화대저충신형자전복합재료적소결성능、정상결구、현미결구화자전성능적영향。수후，위료실현복합재료적저온소결이급종합고필복상도자적자전성능，선취80％（질량분수，하동）NiCuZn철양체／20％CCTO조분，이BBSZ（Bi2O3-H38O3-SiO2-ZnO）파리작위조용제，연구료CCTO／NiCuZn철양체기복합재료적소결행위화자전성능。결과표명，참잡BBSZ후，900℃하소결적소유양품적밀도균체도료복상도자이론밀도적95％，차복상도자적개전상수화자도솔재1～30MHz범위내균불의뢰우빈솔적변화。재10MHz적빈솔하，당BBSZ적함량종0증가도3％시，복상도자자도솔μ종13．2증가도47．9，자손모tanδμ종0．022하강도0．017，동시，양품적해진빈솔종10^9Hz좌우이동도3．2×10^8Hz。상응지，복상도자적개전상수F종9．2증가도16，개전손모tanδε종0．069하강도0．012。저일우이적정체성능사기유망실제응용。
in this paper, CCTO/NiCuZn ferrite composite materials were synthesized by the the conventional ceramic processing. The effect of composition on the sintering properties, crystalline-phase structure, microstructure, magnetic and dielectric properties of the new ferrite-dielectric composite materials had been investigated systematically. To realize low temperature sintering of the composite materials and by a comprehensive evaluation of both magnetic and dielectric properties, we chose the composition of 80% NiCuZn（mass fraction） ferrite/20 wt% CCTO in here. Then, BBSZ glass was considered as an additive and its effect on sintering behavior, magnetic and dielectric properties of CCTO/NiCuZn ferrite composite materials were studied. The results showed that the density of all BBSZ-doped samples sintered at 900 ℃ had reached 95 % of theoretical density. The dielectric constant and permeability of composites showed weak frequency dependence in a frequency range from 1 MHz to 30 MHz. At 10 MHz, as the BBSZ content increased from 0 to 3% （mass fraction）, the permeability μ of composites increased from 13.2 to 47.9, and the magnetic loss tanδμ decreased from 0. 022 to 0. 017. Meanwhile, the resonant frequency of composites decreased from 10^9 Hz to 3.2×10^8Hz. Correspondingly, the dielectric constant ε of composites increased from 9.2 to 16, and the dielectric loss tanδε, decreased from 0. 069 to 0. 012. The excellent whole performances of composites are expected to be able to promote practical applications.
