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.