Hexaferrite particles by coprecipitation and lyophilization
作者： A. Calleja , E. Tijero , B. Martínez , S. Piñol , F. Sandiumenge
DOI: 10.1016/S0304-8853(98)00714-8
关键词:
摘要: Fine strontium hexaferrite particles were prepared by lyophilization (known as freeze-drying) and coprecipitation of nitrates chloride salts, respectively. The resulting powders calcined at different temperatures between 700°C 1100°C. As concluded from the measured hysteresis loops 300 K, freeze-dried showed good magnetic characteristics, coercivity being high 5690 Oe. However, coprecipitated displayed poor values, around 1300 Oe best.
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