Microwave dielectric ceramic material as well as preparation method and application thereof

A microwave dielectric ceramic and modified technology, applied in the field of new materials and microwave communication, can solve the problems of high cost, tight spectrum resources, high energy consumption, etc., and achieve cheap and easy-to-obtain raw materials, good microwave dielectric properties, and excellent performance. Effect

Inactive Publication Date: 2015-10-28
GUANGDONG GOVA ADVANCED MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, many challenges such as tight spectrum resources, high energy cons

Method used

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  • Microwave dielectric ceramic material as well as preparation method and application thereof
  • Microwave dielectric ceramic material as well as preparation method and application thereof
  • Microwave dielectric ceramic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) According to the main crystal phase structure formula: xCaTiO 3 -(1-x)ReAO 3 Stoichiometric ratio Calcium carbonate 2.91kg, titanium dioxide 2.32kg, lanthanum oxide 3.32kg, samarium oxide 0kg, neodymium oxide 7.99kg, aluminum oxide 3.46kg, gallium oxide 0kg are mixed to obtain the first mixture; the first mixture, Deionized water and zirconia balls are mixed with a sand mill for 1 hour at a mass ratio of 1:2:0.5 to make them evenly mixed;

[0040] (2) The material is discharged, spray-dried at 220°C in a spray drying tower, then pre-fired at a temperature of 1250°C for 5 hours, the heating rate is 3°C / min, and cooled with the furnace to obtain the first pre-fired material;

[0041] (3) Get the pulverized first calcined material 16kg, modified additive zirconia 0g and manganese oxide 0g, mix to obtain the first calcined mixed material; mix the first calcined mixed material, deionized water and zirconia The balls are sanded with a sand mill for 1 hour at a mass rati...

Embodiment 2

[0045] (1) According to the main crystal phase structure formula: xCaTiO 3 -(1-x)ReAO 3 Stoichiometric ratio Weigh 2.52kg of calcium carbonate, 2.01kg of titanium dioxide, 2.87kg of lanthanum oxide, 5.12kg of samarium oxide, 1.98kg of neodymium oxide, 0kg of aluminum oxide, and 5.5kg of gallium oxide, and mix them to obtain the second mixture; 1. Deionized water and zirconia balls are sanded with a sand mill for 1 hour to make the mixture uniform with a mass ratio of 1:2:0.5;

[0046] (2) The material is discharged, spray-dried at 220°C in a spray drying tower, then pre-fired at a temperature of 1250°C for 5 hours, and the heating rate is 3°C / min, and cooled with the furnace to obtain the second pre-fired material;

[0047] (3) Get the pulverized second calcined material 16kg, modified additive zirconia 40g and manganese oxide 80g, mix to obtain the second pre-calcined mixture; mix the second calcined mixed material, deionized water and zirconia The balls are sanded with a s...

Embodiment 3

[0051] (1) According to the main crystal phase structure formula: xCaTiO 3 -(1-x)ReAO 3 The stoichiometric ratio takes by weighing calcium carbonate 5.61kg, titanium dioxide 4.47kg, lanthanum oxide 3.73kg, samarium oxide 0kg, neodymium oxide 3.85kg, aluminum oxide 2.34kg, gallium oxide 0kg, mixes and obtains the 3rd mixture; The 3rd mixture, Deionized water and zirconia balls are mixed with a sand mill for 1 hour at a mass ratio of 1:2:0.5 to make them evenly mixed;

[0052] (2) The material is discharged, spray-dried at 220°C in a spray drying tower, then pre-fired at a temperature of 1250°C for 5 hours, the heating rate is 3°C / min, and cooled with the furnace to obtain the third pre-fired material;

[0053] (3) Get the third calcined material 16kg after pulverization, modified additive zirconia 40g and manganese oxide 80g, mix to obtain the third calcined mixed material; mix the third calcined mixed material, deionized water and zirconia The balls are sanded with a sand mi...

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Abstract

The invention belongs to the field of new materials and microwave communication, and particularly relates to a microwave dielectric ceramic material as well as a preparation method and application thereof. The principal crystalline phase of the microwave medium ceramic material adopts the structure of xCaTiO3-(1-x)ReAO3; Re refers to at least one of La, Ns and Sm, and A refers to at least one of Al and Ga; x is less than or equal to 1 and is greater than or equal to 0; the microwave dielectric ceramic material further comprises a modified additive. According to the invention, the microwave dielectric ceramic material is prepared through steps of compounding, sanding, presintering and adding the modified additive, sanding, pelletizating, pressing for formation and sintering. The material has the characteristics of low cost and excellent microwave dielectric property, is high in electric inductivity, high in Q, has a frequency temperature coefficient close to zero temperature excursion and is continuously adjustable in accessories within a certain range, and can be used for manufacturing microwave components such as dielectric resonators, all-dielectric filters, cavity filters, antennas and the like in a communication system.

Description

technical field [0001] The invention belongs to the field of new materials and microwave communication, and in particular relates to a microwave dielectric ceramic material and its preparation method and application. Background technique [0002] As a next-generation mobile communication technology, LTE has become an inevitable path for communication operators to develop future communication networks. However, many challenges such as tight spectrum resources, high energy consumption, and high costs also make operators face more severe cost pressures. In 2015, my country can plan about 1000MHz bandwidth spectrum resources for public mobile communications, but there is still a gap of about 300MHz from the total bandwidth demand of 1360MHz estimated by the Ministry of Industry and Information Technology Research Institute of Telecommunications. Spectrum resources are tight, and improving spectrum utilization has become a top priority. [0003] Microwave dielectric ceramics is ...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/44C04B35/465C04B35/622
Inventor 吕开明殷旺马才兵岑远清
Owner GUANGDONG GOVA ADVANCED MATERIAL TECH
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