Granules of microwave dielectric material for injection molding, and manufacturing method of microwave dielectric device

A microwave dielectric material and injection molding technology, applied in the field of microwave dielectric materials, can solve the problems of increased process, poor uniformity of organizational structure, complex structure, etc., and achieve the effect of improving production efficiency, density and uniformity, and improving performance

Pending Publication Date: 2021-01-26
SHENZHEN SUNLORD ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The production technology of traditional microwave dielectric samples is mainly the dry pressing molding method. The disadvantages of this method are that the shape of the molded product is relatively limited, the strength of the green body is low, the internal compactness of the green body is inconsistent, and the uniformity of the structure is relatively poor, etc. , and because the structure of this type of product is very complicated, dry pressing cannot be completed at one time. It needs to be pressed into a simple green body first, and then processed into the required shape with a lathe, which not only increases the process, but also increases the production cost and time. , there is no guarantee of product consistency

Method used

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  • Granules of microwave dielectric material for injection molding, and manufacturing method of microwave dielectric device
  • Granules of microwave dielectric material for injection molding, and manufacturing method of microwave dielectric device
  • Granules of microwave dielectric material for injection molding, and manufacturing method of microwave dielectric device

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preparation example Construction

[0032] The embodiment of the present invention also provides a method for preparing a microwave dielectric material green body, including the following steps:

[0033] S1. Prepare a microwave dielectric material with a weight percentage of 70% to 90% and a binder of 10% to 30%, wherein the microwave dielectric material includes 60% to 70% of titanium dioxide, 25% to 35% of magnesium oxide, 2 %~8% calcium carbonate, 2%~8% barium carbonate, 0.1%~1% niobium pentoxide, 0.1%~1% bismuth trioxide; the binder includes polyoxymethylene 70%-90% , polymethyl methacrylate 2%-15%, polypropylene 2%-15%, ethylene-vinyl acetate copolymer 2%-15%, wax 2%-10%, dioctyl phthalate 1%- 3%, dibutyl phthalate 1% to 3%, stearic acid 1% to 5%;

[0034] S2, using the materials prepared in step S1 to banbury and granulate;

[0035] S3. Using the material obtained in step S2 to perform injection molding to obtain the microwave dielectric material green body.

[0036] A method for manufacturing a microwa...

Embodiment 1

[0060] Granules for injection molding are composed of the following components by weight percentage:

[0061] Microwave dielectric material 70%

[0062] Binder 30%

[0063] The microwave dielectric material is composed of the following components by weight percentage:

[0064]

[0065]

[0066] Described binding agent is made up of the component of following percentage by weight:

[0067]

[0068] Mix according to the above weight percentages and put them into the internal mixer for internal mixing, set the temperature at 180° C., set the speed of the agitator at 60 rpm, and set the time for 2 hours. After the mud is refined, it will be automatically cut into Ф5mm~Ф10mm materials in the internal mixer for later use.

[0069] Heat and melt the material in the barrel of the injection machine at 180°C, inject the molten material into the mold cavity under a pressure of 110Bar, and fill the cavity; after the cavity is filled, the heat in the material is conducted out t...

Embodiment 2

[0079] Granules for injection molding are composed of the following components by weight percentage:

[0080] Microwave dielectric material 75%

[0081] Binder 25%

[0082] The microwave dielectric material is composed of the following components by weight percentage:

[0083]

[0084] Described binding agent is made up of the component of following percentage by weight:

[0085]

[0086] Mix according to the above weight percentages and put them into an internal mixer for internal mixing, set the temperature at 185° C., set the rotational speed of the agitator at 60 rpm, and set the time for 2 hours. After the mud is refined, it will be automatically cut into Ф5mm~Ф10mm materials in the internal mixer for later use.

[0087] Heat and melt the material in the barrel of the injection machine at 185°C, inject the molten material into the mold cavity under a pressure of 115 Bar, and fill the cavity; after the cavity is filled, the heat in the material is conducted throug...

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Abstract

The invention relates to granules of a microwave dielectric material for injection molding, and a manufacturing method of a microwave dielectric device. The granules comprise, by weight, 70-90% of a microwave dielectric material and 10-30% of a binder, wherein the microwave dielectric material comprises 60-70% of titanium dioxide, 25-35% of magnesium oxide, 2-8% of calcium carbonate, 2-8% of barium carbonate, 0.1-1% of niobium pentoxide, and 0.1-1% of bismuth trioxide, and the binder comprises 70-90% of polyformaldehyde, 2-15% of polymethyl methacrylate, 2-15% of polypropylene, 2-15% of an ethylene-vinyl acetate copolymer, 2-10% of wax, 1-3% of dioctyl phthalate, 1-3% of dibutyl phthalate and 1-5% of stearic acid. According to the invention, the relative dielectric constant epsilon r, theQ*f value and the resonant frequency temperature coefficient tau f of the microwave dielectric device manufactured by the method are better than those of a traditional method, and crystal grains of asample are compact, fine and uniform.

Description

technical field [0001] The invention relates to a microwave dielectric material, in particular to a pellet of a microwave dielectric material for injection molding and a method for manufacturing a microwave dielectric device. Background technique [0002] The production technology of traditional microwave dielectric samples is mainly dry pressing molding method. The disadvantages of this method are that the shape of the molded product is relatively limited, the strength of the green body is low, the internal compactness of the green body is inconsistent, and the uniformity of the structure is relatively poor. , and because the structure of this type of product is very complicated, the dry pressing cannot be completed at one time. It needs to be pressed into a simple body first, and then processed into the required shape by a lathe, which not only increases the process, but also increases the production cost and time. , and there is no guarantee of product consistency. [00...

Claims

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Application Information

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IPC IPC(8): C04B35/626C04B35/46C04B35/622
CPCC04B35/62695C04B35/46C04B35/622C04B2235/3206C04B2235/3208C04B2235/3215C04B2235/3251C04B2235/3298C04B2235/6022C04B2235/656C04B2235/6562C04B2235/6567C04B2235/6565C04B2235/658C04B2235/6583C04B2235/77
Inventor 朱晏军聂敏
Owner SHENZHEN SUNLORD ELECTRONICS
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