MnZn ferrite magnetic isolation shim as well as preparation method and application thereof

Abstract

The invention provides a MnZn ferrite magnetic isolation shim as well as a preparation method and application thereof. The MnZn ferrite magnetic isolation shim is mainly prepared from main componentsand auxiliary components, wherein the main components are prepared from MnO, Fe2O3 and ZnO; the auxiliary components are prepared from calcium element, zirconium element, niobium element, silicon element, vanadium element, cobalt element and gadolinium element. The preparation method comprises the following steps: (1) dosing and breaking; (2) presintering; (3) secondary breaking and slurrying; (4)tape casting moulding; (5) sintering. According to the MnZn ferrite magnetic isolation shim provided by the invention, by reasonably matching the main components and the auxiliary components, the prepared magnetic isolation shim has high saturation induction density and high magnetic conductivity; the preparation method provided by the invention is simple and efficient and suitable for factory mass production and improves the tape-casting preparation efficiency of raw shims.

Description

technical field

[0001] The invention belongs to the technical field of electronic materials, and in particular relates to a MnZn ferrite magnetic isolation sheet and a preparation method and application thereof. Background technique

[0002] With the rapid development of modern electronic technology, the improvement of people's living standards and the influence of trendy ideas, the innovation and convenience of electronic products are more and more accepted by the public. Wireless charging mobile phones, electric vehicles, and various home appliances, etc. The relevant electronic appliances of charging technology are also more and more accepted by the majority of users. At present, the magnetic induction wireless charging technology dominates the wireless charging market, and its working distance is generally within 5mm. The principle and design of the near-field induction wireless charging system requires the use of protective materials to avoid the generation of eddy cur...

Examples

Embodiment 1

[0091] This embodiment prepares MnZn ferrite magnetic isolation sheet according to the following method:

[0092] 1) Ingredients: respectively select Fe with a purity of 99.5% 2 o 3 , 99% MnO, 99.7% ZnO, the molar ratio of the three is: 51.2:38.5:10.3.

[0093] 2) One-time ball milling and mixing: Put the ball into a ball mill tank with a ball-to-material ratio of 2.5:1, and add deionized water for wet milling. The ball milling time is 45 minutes, and the rotation speed is 160 r / min.

[0094] 3) Pre-burning: put the ground powder into a resistance furnace for pre-burning, the pre-burning temperature is 900° C., and the holding time is 3 hours to obtain the pre-fired powder.

[0095] 4) Secondary ball milling pulping: according to the mass ratio, it is ball: material: pulping solvent = 60:20:7; the amount of adding auxiliary components is CaCO 3 0.035wt%, ZrO 2 0.03wt%, Nb 2 o 5 0.01wt% and SiO 0.05wt%, V 2 o 5 0.02wt%, Co 2 o 3 0.35wt%, Gd (calculated as GdO) 0.05%w...

Embodiment 2

[0103] This embodiment prepares MnZn ferrite magnetic isolation sheet according to the following method:

[0104] 1) Ingredients: respectively select Fe with a purity of 99.5% 2 o 3 , 99% MnO, 99.7% ZnO, the molar ratio of the three is: 51.5:38:10.5;

[0105] 2) One-time ball milling and mixing: Put the ball into a ball mill tank with a ball-to-material ratio of 2.5:1, and add deionized water for wet milling. The ball milling time is 60 minutes, and the rotating speed is 160r / min;

[0106] 3) Pre-burning: put the ground powder into a resistance furnace for pre-burning, the pre-burning temperature is 900° C., and the holding time is 3 hours to obtain the pre-fired powder.

[0107] 4) According to the mass ratio, it is ball: material: pulping solvent=60:20:7; the amount of adding auxiliary components is CaCO 3 0.02wt%, ZrO 2 0.02wt%, Nb 2 o 5 0.03wt% and SiO 0.03wt%, V 2 o 5 0.04wt%, Co 2 o 3 0.25wt%, Gd (calculated as GdO) 0.05%wt; add dispersant castor oil at the sa...

Embodiment 3

[0115] This embodiment prepares MnZn ferrite magnetic isolation sheet according to the following method:

[0116] 1) Ingredients: respectively select Fe with a purity of 99.5% 2 o 3 , 99% MnO, 99.7% ZnO, the molar ratio of the three is: 51.8:37.5:10.7;

[0117] 2) One-time ball milling and mixing: Put the ball into a ball mill tank with a ball-to-material ratio of 2.5:1, and add deionized water for wet milling. The ball milling time is 45 minutes, and the rotating speed is 160r / min;

[0118] 3) Pre-burning: put the ground powder into a resistance furnace for pre-burning, the pre-burning temperature is 900° C., and the holding time is 3 hours to obtain the pre-fired powder.

[0119] 4) According to the mass ratio, it is ball: material: pulping solvent=60:20:7; the amount of adding auxiliary components is CaCO 3 0.025wt%, ZrO 2 0.015wt%, Nb 2 o 5 0.035wt% and SiO 0.025wt%, V 2 o 5 0.015wt%, Co 2 o 3 0.30wt%, Gd (calculated as GdO) 0.08%wt; add dispersant castor oil at...

technical field

[0001] The invention belongs to the technical field of electronic materials, and in particular relates to a MnZn ferrite magnetic isolation sheet and a preparation method and application thereof. Background technique

[0002] With the rapid development of modern electronic technology, the improvement of people's living standards and the influence of trendy ideas, the innovation and convenience of electronic products are more and more accepted by the public. Wireless charging mobile phones, electric vehicles, and various home appliances, etc. The relevant electronic appliances of charging technology are also more and more accepted by the majority of users. At present, the magnetic induction wireless charging technology dominates the wireless charging market, and its working distance is generally within 5mm. The principle and design of the near-field induction wireless charging system requires the use of protective materials to avoid the generation of eddy cur...

Examples

Embodiment 1

[0091] This embodiment prepares MnZn ferrite magnetic isolation sheet according to the following method:

[0092] 1) Ingredients: respectively select Fe with a purity of 99.5% 2 o 3 , 99% MnO, 99.7% ZnO, the molar ratio of the three is: 51.2:38.5:10.3.

[0093] 2) One-time ball milling and mixing: Put the ball into a ball mill tank with a ball-to-material ratio of 2.5:1, and add deionized water for wet milling. The ball milling time is 45 minutes, and the rotation speed is 160 r / min.

[0094] 3) Pre-burning: put the ground powder into a resistance furnace for pre-burning, the pre-burning temperature is 900° C., and the holding time is 3 hours to obtain the pre-fired powder.

[0095] 4) Secondary ball milling pulping: according to the mass ratio, it is ball: material: pulping solvent = 60:20:7; the amount of adding auxiliary components is CaCO 3 0.035wt%, ZrO 2 0.03wt%, Nb 2 o 5 0.01wt% and SiO 0.05wt%, V 2 o 5 0.02wt%, Co 2 o 3 0.35wt%, Gd (calculated as GdO) 0.05%w...

Embodiment 2

[0103] This embodiment prepares MnZn ferrite magnetic isolation sheet according to the following method:

[0104] 1) Ingredients: respectively select Fe with a purity of 99.5% 2 o 3 , 99% MnO, 99.7% ZnO, the molar ratio of the three is: 51.5:38:10.5;

[0105] 2) One-time ball milling and mixing: Put the ball into a ball mill tank with a ball-to-material ratio of 2.5:1, and add deionized water for wet milling. The ball milling time is 60 minutes, and the rotating speed is 160r / min;

[0106] 3) Pre-burning: put the ground powder into a resistance furnace for pre-burning, the pre-burning temperature is 900° C., and the holding time is 3 hours to obtain the pre-fired powder.

[0107] 4) According to the mass ratio, it is ball: material: pulping solvent=60:20:7; the amount of adding auxiliary components is CaCO 3 0.02wt%, ZrO 2 0.02wt%, Nb 2 o 5 0.03wt% and SiO 0.03wt%, V 2 o 5 0.04wt%, Co 2 o 3 0.25wt%, Gd (calculated as GdO) 0.05%wt; add dispersant castor oil at the sa...

Embodiment 3

[0115] This embodiment prepares MnZn ferrite magnetic isolation sheet according to the following method:

[0116] 1) Ingredients: respectively select Fe with a purity of 99.5% 2 o 3 , 99% MnO, 99.7% ZnO, the molar ratio of the three is: 51.8:37.5:10.7;

[0117] 2) One-time ball milling and mixing: Put the ball into a ball mill tank with a ball-to-material ratio of 2.5:1, and add deionized water for wet milling. The ball milling time is 45 minutes, and the rotating speed is 160r / min;

[0118] 3) Pre-burning: put the ground powder into a resistance furnace for pre-burning, the pre-burning temperature is 900° C., and the holding time is 3 hours to obtain the pre-fired powder.

[0119] 4) According to the mass ratio, it is ball: material: pulping solvent=60:20:7; the amount of adding auxiliary components is CaCO 3 0.025wt%, ZrO 2 0.015wt%, Nb 2 o 5 0.035wt% and SiO 0.025wt%, V 2 o 5 0.015wt%, Co 2 o 3 0.30wt%, Gd (calculated as GdO) 0.08%wt; add dispersant castor oil at...

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