Moulding of sintered hexagonal ferrite material

The invention relates to a moulding of a sintered hexagonal ferrite material. This moulding is characterized in that the majority of the grains of the material have a monodomain structure. By virtue thereof, the loss factor tan delta of this material is much smaller than that of corresponding known materials if said material is used in the frequency range of 100 MHz or higher. The monodomain structure of this material is obtained, in particular, if the average grain size of the material is smaller than 2.8 micrometers. The average grain size preferably ranges between 1.4 micrometers and 2.5 micrometers. Preference is given, in particular, to those ferrite materials whose composition corresponds to the formula Ba3Me2Fe24O41, wherein Me stands for one or more divalent ions selected from the group formed by Co, Fe, Mn, Ni, Zn, Mg and (Li.Fe)1/2. Even at very high frequencies, these materials exhibit a small loss factor. The mouldings in accordance with the invention are extremely suitable for use in antennas

Sintered moulding, transformer core and inductor of li(ni)zn ferrite material, as well as applications thereof

The invention relates to a sintered moulding of Li(Ni)Zn ferrite material, a transformer core and an inductor core of this material as well as several applications of these cores. In accordance with the invention, the majority of the grains of the sintered material have a monodomain structure. This leads to a substantial reduction of the loss factor and the overall losses when these mouldings are subjected to high-frequency applications and power applications. The ferrite material preferably comprises 59-65 mol% Fe2O3, 7-11 mol% Li2CO3, 4-8 mol% MnO and 20-28 mol% ZnO. This also provides the material with a high saturation magnetization

Device and method for providing information about a biopsy taking process and biopsy system

The present invention relates to a device for providing information about a biopsy taking process configured to operate in conjunction with a biopsy taking device (7), the device (1) for providing information about the biopsy taking process comprising: an image acquisition device (6) for acquiring image frames of live anatomy being biopsied, the image acquisition device comprising an electronic processing device (3), a trigger element (2); and a memory (8), preferably being part of the image acquisition device; wherein the trigger element (2) is configured to generate a trigger event to trigger the biopsy taking device (7) for taking a biopsy sample from a biopsy location (9) in said anatomy, and to trigger the image acquisition device (6); and wherein the electronic processing device (3) is configured to: detect the trigger event, upon detection of the trigger event, to select a trigger image frame acquired by the image acquisition device (6) at a predefined point in time after the trigger event, and to store the trigger image frame in the memory (8). The invention provides a facilitated way of determining the biopsy location