Process for mfg. heat-sensitive Mn-Zn ferrite series material

Abstract

A thermosensitive Mn-Zn ferrite series is prepared from Fe2O3, ZnO, CuO and Mn3O4 through ball grinding for mixing, pre-calcining at 700-1100 deg.C, maintaining the temp for 1-4 hr, crushing, ball grinding, sieving, deposition, baking, adding polyvinyl alcohol solution and zinc stearate, stirring, die pressing and sintering at 90-1300 deg.C. Its advantage is excellent magnetic performance.

Description

Technical field: [0001] The invention relates to a preparation method of heat-sensitive manganese-zinc ferrite series materials, which is a method for synthesizing multiple reactants with different formulas in parallel and quickly, and using high-throughput detection and screening technology to obtain a series of complete, high-performance The invention relates to a method for excellent heat-sensitive manganese-zinc ferrite series materials, belonging to the technical field of new material preparation. Background technique: [0002] The magnetic permeability or saturation magnetic induction of magnetic materials drops sharply near the Curie temperature. Thermally sensitive magnetic devices made of this feature, such as thermal magnetic switches (TRS), thermal solid state relays (FTC) and overheat monitors ( OHD), etc., are widely used in temperature control, temperature limit, early warning and medical treatment. [0003] The large-scale application of thermosensitive ferri...

AI Technical Summary

Problems solved by technology

[0006] At present, there are still several problems in the research and development work at home and abroad: (1) Japan has carried out systematic research on the main physical properties of materials in the temperature range of -40 ~ 150 ° C by using the traditional serial method and developed, has improved the Curie temperature T C Material series every 5°C, but some key properties of the material have not been reported

This level has not been reached in China, especially the series of high-performance materials in the low-temperature region is still blank, and no reports of commercial production have been seen so far.

(2) As a practical and mass production, the consistency of product performance, especially the Curie point T C Consistency of , is critical, but has not been well resolved

However, how to effectively control and produce thermally sensitive ferrite materials with different μ-T characteristics according to different requirements of devices is rarely reported.

(4) With the continuous expansion of application fields and the continuous update of user requirements, the requirements for new materials are becoming increasingly urgent, but the speed of research and development of new materials obviously cannot keep up with the needs of production

Images