Initial magnetic-inductive capacity 20 (+4) (-4) nickel-zinc ferrite material and preparation method

Abstract

The invention discloses an oxygen body material of nickel, zinc and ferrum with initial permeability being 20<-4><+4> and a preparation method thereof. The main phase of the material is spinel structure, and the material essentially consists of Fe2O3, MnO, NiO and CoO, and the contents of composition calculated by oxide are: 46mol percent to 49mol percent of Fe2O3, 0.1mol percent to 1.0mol percent of MnO, 42.7mol percent to 49mol percent of NiO and 1.3mol percent to 2.5mol percent of CoO; the oxygen body material of nickel, zinc and ferrum with initial permeability being 20<-4><+4> has broadband, low electromagnetic consumption and good stability in larger working current and can be used for producing various power couplers of high-frequency electrodeless lamps with the working frequency in 80MHz; the material has extremely low electromagnetic consumption in high frequency ranging from 3MHz to 80MHz; when the frequency is 3MHz, the quality factor Q is more than 210; when the frequencyis 80MHz, the quality factor Q is more than 100; due to good electromagnetic consumption characteristic in such wide frequency range, the oxygen body material has wide market prospect in a lighting system of novel electroless lamps.

Description

technical field The invention relates to a nickel-zinc ferrite material that can be used to make power couplers for various high-frequency electrodeless lamps with an operating frequency within 80 MHz, especially a nickel-zinc ferrite material with an initial magnetic permeability of 20 -4 +4 Nickel zinc ferrite material and preparation method thereof. Background technique High Frequency Electronic Discharge Lamp (High Frequency Electronic Discharge Lamp) is a high-tech new light source that integrates the latest electronic power-saving technology and electric light source technology. It does not use a filament, but uses a magnetic field to stimulate gas discharge and light emission. It is highly efficient, energy-saving, and environmentally friendly. , long life and many other advantages. The high-frequency electrodeless lamp is composed of three parts: the excitation power supply, the power coupler and the bulb. The excitation source generates an electric frequency curre...

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Problems solved by technology

At present, 3F4 power manganese zinc ferrite is generally used abroad to prepare power couplers in high frequency electrodeless lamps, but due to the existence of Fe 2 + ⇔ Fe 3 + Such a conductive pair, so its resistivity is usually low, and because the operating frequency of the high-frequency electrodeless lamp is usually above 2MHz, this leads to a sharp increase in the eddy current loss of the ferrite, which greatly reduces the efficiency of the lamp

In addition, because the eddy current loss of manganese zinc ferrite is very large, and the eddy current loss is mainly converted into heat, which causes the temperature of the ferrite to reach above 100°C during the working process, so that the 3F4 power manganese zinc ferrite can be assembled In the power coupler, special insulation treatment and skeleton support must be carried out, which leads to a more complicated process and increases the production cost

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