RU1841348C - Low coercive ferrite material for phase shifters - Google Patents

Abstract

FIELD: magnetic materials.

SUBSTANCE: invention relates to the field of creating magnetic materials. The claimed ferrite material for phase shifters based on nickel-copper-manganese-magnesium ferrite with an additive contains iron oxide, magnesium oxide, copper oxide, manganese oxide, nickel oxide and the initial components of the additive, as which indium is used with the following containing the initial components in mol.%: iron oxide 39.28-41.28, magnesium oxide 38.24-40.24, copper oxide 9.05-11.05, manganese oxide 2.91-3.91, nickel oxide 2.52-3.52 and indium oxide 3.50-4.00.

EFFECT: technical result is a reduction in coercive force.

1 cl, 1 tbl

Description

Previously known ferrites with a rectangular hysteresis loop, used as elements of phase shifters in microwave devices, were characterized by a high value of coercive force (more than 2 oersteds), which significantly increased the energy consumption for controlling the corresponding devices. The purpose of the present invention is to develop a ferrite material that, having a low coercive force, provides a corresponding significant reduction in the energy expended in driving a ferrite device.

According to the invention, this goal is achieved by the fact that up to 4 mol.% of indium oxide is additionally introduced into the composition based on nickel-copper-manganese-magnesium ferrite.

The introduction of indium contributes to a favorable change in the quadrupole splitting and significantly increases the symmetry of the environment of the ions, bringing it as close as possible to the ideal cubic structure, which contributes to the optimal distribution of cations between the tetrahedral and octahedral positions in terms of the magnitude of the coercive force. As a result, the coercive force drops by a factor of 2 compared to a similar composition without indium, and the energy spent on controlling the phase shifter decreases by a factor of 2 and ranges from 60 to 120 μJ/cm ³ , while when using nickel-copper-manganese -magnesium ferrite without indium in the phase shifter, the corresponding energy consumption is 200-220 μJ/cm ³ .

Below is the composition of the proposed composition.

The initial products for obtaining the above composition in the form of powders have the following characteristics:

Fe ₂ O ₃ "pure for analysis" for ferrites with PPG MRTU 6-09-6261-69;

MgO "pharmacopoeial";

CuCO ₃ ×Cu(OH) ₂ "pure", GOST 8927-58;

MnCO ₃ "pure", GOST 7205-67;

NiO "pure", MRTU 6-09-6600-70;

In ₂ O ₃ "special purity", MRTU 6-09-1243-64.

Ferrite is produced using conventional ceramic technology and does not require additional costs.

Claims (2)

Ferrite material for phase shifters based on nickel-copper-manganese-magnesium ferrite with an additive, containing as initial components iron oxide, magnesium oxide, copper oxide, manganese oxide, nickel oxide and initial components of the additive, characterized in that, in order to reduce the coercive strength, indium was used as an additive with the following content of the initial components (in mol.%): iron oxide 39.28-41.28 magnesium oxide 38.24-40.24 copper oxide 9.05-11.05 manganese oxide 2.91-3.91 nickel oxide 2.52-3.52 indium oxide 3.50-4.00