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Microwave medium ceramic material with ultrahigh Q-value middle dielectric constant

A technology of microwave dielectric ceramics and electrical constants, applied in ceramics, inorganic insulators, etc., can solve the problems of high dielectric constant and low quality factor, and achieve the effects of convenient operation, simple manufacturing process, and large industrial application value

Inactive Publication Date: 2009-10-14
江苏灿勤科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a microwave dielectric ceramic material with a medium dielectric constant and an ultra-high Q value, aiming to solve the problem of high dielectric constant and low quality factor of existing microwave dielectric ceramic materials

Method used

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  • Microwave medium ceramic material with ultrahigh Q-value middle dielectric constant
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Embodiment 1

[0037] Embodiment 1: A microwave dielectric ceramic material with a medium dielectric constant and an ultra-high Q value

[0038] The raw material formula is composed of the following materials in mass percentage:

[0039] Calcium Carbonate 30%;

[0040] Aluminum oxide 10%;

[0041] Neodymium oxide 25%;

[0042] Titanium Dioxide 35%.

[0043] The calcium carbonate, aluminum oxide, neodymium oxide and titanium dioxide are all analytically pure.

[0044] The preparation method is as follows: the synthesis process consists of the following steps in order:

[0045] The first step: after weighing calcium carbonate, alumina, neodymium oxide and titanium dioxide according to the raw material formula, place them in a zirconia ball mill, use deionized water as a solvent, and grind for 40 hours to obtain a uniformly mixed mixture;

[0046] The second step: in an infrared oven at a temperature of 105°C, dry the homogeneously mixed mixture obtained in the first step to remove deioniz...

Embodiment 2

[0051] Example 2: A microwave dielectric ceramic material with a medium dielectric constant and an ultra-high Q value

[0052] The raw material formula is composed of the following materials in mass percentage:

[0053] Calcium Carbonate 30%;

[0054] Aluminum oxide 12%;

[0055] Neodymium oxide 25%;

[0056] Titanium dioxide 33%.

[0057] The calcium carbonate, aluminum oxide, neodymium oxide and titanium dioxide are all analytically pure.

[0058] The preparation method is as follows: the synthesis process consists of the following steps in order:

[0059] The first step: after weighing calcium carbonate, aluminum oxide, neodymium oxide and titanium dioxide according to the raw material formula, place them in a zirconia ball mill, use deionized water as a solvent, and grind for 55 hours to obtain a uniformly mixed mixture;

[0060] The second step: in an infrared oven at a temperature of 105°C, dry the uniformly mixed mixture obtained in the first step to remove deioniz...

Embodiment 3

[0065] Embodiment 3: A microwave dielectric ceramic material with a medium dielectric constant and an ultra-high Q value

[0066] The raw material formula is composed of the following materials in mass percentage:

[0067] Calcium Carbonate 33%;

[0068] Aluminum oxide 12%;

[0069] Neodymium oxide 25%;

[0070] Titanium dioxide 30%.

[0071] The calcium carbonate, aluminum oxide, neodymium oxide and titanium dioxide are all analytically pure.

[0072] The preparation method is as follows: the synthesis process consists of the following steps in order:

[0073] The first step: after weighing calcium carbonate, alumina, neodymium oxide and titanium dioxide according to the raw material formula, place them in a zirconia ball mill, use deionized water as the medium, and grind for 48 hours to obtain a uniformly mixed mixture;

[0074] The second step: in an infrared oven at a temperature of 105°C, dry the uniformly mixed mixture obtained in the first step to remove deionized ...

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Abstract

The invention provides a microwave medium ceramic material with ultrahigh Q-value middle dielectric constant to satisfy the miniaturization of microwave element for communication which is possible to enter the industrialized production stage. The microwave medium ceramic material provided by the invention uses analytically pure CaCO3, Al2O3, Nd2O3 and TiO2 as a raw material and CaCO3-Al2O3-Nd2O3-TiO2 ceramic is prepared by traditional solid state sintered technology with simple technology and cheap finished product. Compared with the present microwave medium material, the microwave medium ceramic material provided by the invention has ultrahigh Q-value; Q is more than or equal to 30000; Epsilon is equal to 43 to 45; frequency temperature coefficient is -0.8ppm / DEG C to +0.5ppm / DEG C. the invention is characterized by good production repeatability, stable performance and makes the miniaturization of microwave element possible.

Description

technical field [0001] The invention relates to a medium dielectric constant ultra-high Q-value microwave dielectric ceramic material, belonging to the technical field of microwave dielectric ceramic material preparation. The material is mainly used for microwave mobile communication resonators, filters and other electronic components. Background technique [0002] Microwave dielectric ceramics refer to ceramics that are used as dielectric materials in microwave frequency band (mainly UHF, SHF) circuits and perform one or more functions. It has the characteristics of low loss, small frequency temperature coefficient, and high quality factor. This microwave dielectric ceramic material can be used to make resonators, filters, duplexers, antennas, voltage-controlled oscillators, microwave substrates, dielectric guided wave transmission lines, etc. These components are widely used in mobile communications, satellite TV broadcast communications, Radar, global satellite positioni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/46C04B35/01C04B35/622H01B3/12
Inventor 朱田中
Owner 江苏灿勤科技股份有限公司
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