Abstract
Composite formation of a magnetic ferrite with nonmagnetic oxides provide a useful application for microwave integrated systems. Holst and Lemke [1] and Paladino and Snider [2] have prepared ferrite-dielectric oxide composites by conventional sintering and hot-pressing, respectively. We examined the joining of NiZn ferrite with ilmenite type titanates, FeTiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> , CoTiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> , and NiTiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> by a hot-pressing technique [3]. Under a hot-pressing condition of 1200°C, 200 kg/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> for air 2 h, a combination of the ferrite and NiTiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> was successful in joining without any cracks, but the other combinations of the ferrite with FeTiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> and CoTiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> were destructive at the interfacial boundaries. For photomicrographs and additional details, see Digests of the 1972 Intermag Conference (available from IEEE Headquarters).
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