2024-03-29T00:30:56Zhttps://eprints.lib.hokudai.ac.jp/dspace-oai/requestoai:eprints.lib.hokudai.ac.jp:2115/573252022-11-17T02:08:08Zhdl_2115_20045hdl_2115_139Low-temperature fabrication of NiCuZn Ferrite^|^ndash;(Ba0.7Sr0.3)TiO3 composites using granulated powdersKitahara, NaotoKageyama, HiroakiKawasaki, TomoyaAbe, KazutomoItoh, Hidenobu1000040110259Takahashi, Junichiopen accessNiCuZn ferrite(Ba0.7Sr0.3)TiO3Composite ceramicsGranulated powderBi2O3-based additiveLow-temperature sintering430NiCuZn ferrite( Ba0.7Sr0.3)TiO3 (BST) composite ceramics with the BST content of up to 50 vol% were fabricated by sintering compacted powder mixtures at 900°C. The granulation of the BST powder and addition of a Bi2O3-based oxide additive effectively assisted the densification of the composite samples. The samples thus fabricated showed required ¾r values whereas their ®r values were considerably reduced, especially for those with lower BSTcontents. From the detailed examinations on the effect of the Bi2O3- based oxide additives and on the process modification to improve the reduced ®r values, the addition of a Bi2O3ZnO additive with the eutectic composition of as low as 1wt%was enough to produce a densified 10 vol%BSTcomposite sample with a highest ®r value. It was also found that the incorporation of ferrite granules calcined at 600°C caused further improvement of ®r. Thus, a densified 10BST composite sample with ®r = 125 was fabricated by low-temperature sintering at 900°C.The Ceramic Society of Japan2013engjournal articleVoRhttp://hdl.handle.net/2115/57325https://doi.org/10.2109/jcersj2.121.541882-07431348-6535Journal of the Ceramic Society of Japan12114095461https://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/57325/1/Ferrite%20BST%20by%20JTakahashi%202013-1.pdfapplication/pdf1.92 MB2013