Small-line-width low-loss microwave ferrite material and manufacturing method thereof

Abstract

The invention discloses a small-line-width low-loss microwave ferrite material, which has a main phase of a garnet structure and a chemical formula of Y3-2xCa2xVxInyMnzFe5-x-y-zO12 or Y3-xCaxGexInyMnzFe5-x-y-zO12, wherein x is more than or equal to 0.01 and is less than or equal to 1.0, y is more than or equal to 0.08 and is less than or equal to 0.5, and z is more than or equal to 0.01 and is less than or equal to 0.06. The invention also provides a method for preparing the small-linewidth low-loss microwave ferrite material. The manufacturing process flow of the method comprises the following steps: 1) calculating and weighing raw materials according to the chemical formula; 2) performing primary wet method ball milling on the raw materials; 3) performing primary sintering; 4) performing secondary wet method ball milling; 5) performing drying and granulating; 6) performing press forming; and 7) performing secondary sintering. The small-linewidth low-loss microwave ferrite material has the advantages of smaller resonance line width (deltaH) and lower dielectric loss (tgdeltae), greatly improves stability and reliability, and enlarges application range; a microwave device made from the small-line-width low-loss microwave ferrite material has better quality; besides, the method has a reasonable process, so that the production cost is further reduced.

Description

technical field [0001] The invention relates to a microwave ferrite material with small line width and low loss and a manufacturing method thereof, belonging to the fields of microwave communication and magnetic materials. Background technique [0002] Both satellite communication and mobile communication use microwave as the means of transmission. Microwave ferrite circulator / isolator is an indispensable basic device. The key is to use a microwave ferrite material with small line width and low loss. With the rapid development of electronic technology, new requirements are put forward for microwave ferrite devices, and higher requirements are also put forward for microwave ferrite materials. One of the development trends of microwave ferrite materials is that the resonance line width (ΔH) should be as small as possible, and the dielectric loss (tgδe) should be as low as possible. Only in this way can better communication quality and lower production cost be obtained. A sma...

AI Technical Summary

Problems solved by technology

The garnet ferrite prepared in the above patents is actually a magnetic material used in the field of microwave communication, but due to the different formulations and preparation methods, the resonance linewidth (ΔH) and dielectric loss (tgδe) of the obtained materials are Different, the application effect on the device is also different

For the current market demand, the resonant linewidth (ΔH) and dielectric loss (tgδe) of the microwave ferrite prepared by the above patents are still insufficient, so further improvement is needed for this ferrite material