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BCSLTM-SA composite microwave dielectric ceramic and preparation method thereof

A technology of microwave dielectric ceramics and ceramics, applied in the field of microwave dielectric ceramics, can solve problems such as high sintering temperature, unstable structure, and performance deterioration, and achieve the effects of low sintering temperature, low cost, and simple preparation method

Active Publication Date: 2019-05-17
GUANGDONG GOVA ADVANCED MATERIAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, more studies have been conducted on Ba with a dielectric constant of around 80. 6-3x ln 8+2x Ti 18 o 54 The (Ln=La,Sm) system has a large loss and an unstable structure, and the high sintering temperature is prone to titanium reduction, resulting in a significant deterioration in performance, which still needs further research.

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  • BCSLTM-SA composite microwave dielectric ceramic and preparation method thereof

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preparation example Construction

[0045] The present invention also provides a preparation method of the BCSLTM-SA composite microwave dielectric ceramic described in the above technical solution, comprising the following steps:

[0046] a) BaCO 3 , CaCO 3 、Sm 2 o 3 , La 2 o 3 、TiO 2 and MnO 2 After mixing, the first grinding treatment is carried out, and then the first pre-sintering is carried out to obtain BCSLTM pre-sintered material; at the same time, the Sm 2 o 3 and Al 2 o 3 After mixing, the second grinding treatment is carried out, and then the second pre-sintering is carried out to obtain the SA pre-sintered material;

[0047] b) After mixing the BCSLTM pre-sintered material obtained in step a) and the SA pre-sintered material, perform the third grinding treatment to obtain a powder; then add a binder to the powder for granulation and molding to obtain a ceramic raw material Blank; finally, the obtained ceramic green body is sintered to obtain BCSLTM-SA composite microwave dielectric cerami...

Embodiment 1

[0087] (1) According to Ba 1.2 Ca 0.4 SM 3 L a1.26 Ti 8.99 mn 0.01 o 26 The molar ratio weighs 34.3517g BaCO 3 , 5.808gCaCO 3 、75.8999g Sm 2 o 3 , 29.7767g La 2 o 3 , 104.1638g TiO 2 and 0.6411g MnO 2 , mixed to obtain the first mixture; the first mixture, zirconium balls and deionized water were wet-milled with a planetary mill for 6 hours at a mass ratio of 1:2:2, dried at 150°C, and dried at 850 Pre-fired at ℃ (in the air atmosphere) for 3 hours, the heating rate was 3 ℃ / min, and cooled with the furnace to obtain BCSLTM pre-fired material.

[0088] (2) According to SmAlO 3 The molar ratio weighs 193.4339g Sm 2 o 3 and 56.5661g Al 2 o 3 , mixed to obtain the second mixture; the second mixture, zirconium balls and deionized water were wet-milled with a planetary mill for 6 hours at a mass ratio of 1:2:2, dried at 150°C, and dried at 1100 Pre-fired at ℃ (in the air atmosphere) for 2 hours, the heating rate was 3 ℃ / min, and cooled with the furnace to obtain S...

Embodiment 2

[0096] (1) According to Ba 1.2 Ca 0.4 SM 3 L a1.26 Ti 8.99 mn 0.01 o 26 The molar ratio weighs 34.3517g BaCO 3 , 5.808gCaCO 3 、75.8999g Sm 2 o 3 , 29.7767g La 2 o 3 , 104.1638g TiO 2 and 0.6411g MnO 2 , mixed to obtain the first mixture; the first mixture, zirconium balls and deionized water were wet-milled with a planetary mill for 6 hours at a mass ratio of 1:2:2, dried at 150°C, and dried at 850 Pre-fired at ℃ (in the air atmosphere) for 3 hours, the heating rate was 3 ℃ / min, and cooled with the furnace to obtain BCSLTM pre-fired material.

[0097] (2) According to SmAlO 3 The molar ratio weighs 193.4339g Sm 2 o 3 and 56.5661g Al 2 o 3 , mixed to obtain the second mixture; the second mixture, zirconium balls and deionized water were wet-milled with a planetary mill for 6 hours at a mass ratio of 1:2:2, dried at 150°C, and dried at 1100 Pre-fired at ℃ (in the air atmosphere) for 2 hours, the heating rate was 3 ℃ / min, and cooled with the furnace to obtain S...

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Abstract

The invention provides a BCSLTM-SA composite microwave dielectric ceramic and a preparation method thereof. The BCSLTM-SA composite microwave dielectric ceramic is prepared from Ba1.2Ca0.4Sm3La1.26Ti8.99Mn0.01O26 and SmAlO3, wherein the mass percent of the SmAlO3 is 5 to 15 percent. Compared with the prior art, the BCSLTM-SA composite microwave dielectric ceramic provided by the invention is formed by compounding BCSLTM and SA in specific proportion. The BCSLTM-SA composite microwave dielectric ceramic comprises two crystal phase structures of Ba1.2Ca0.4Sm3La1.26Ti8.99Mn0.01O26 and SmAlO3; thestructure is stable; specific dielectric constant and high Q*f values are realized; meanwhile, the resonant frequency temperature coefficient is continuous and adjustable.

Description

technical field [0001] The invention relates to the technical field of microwave dielectric ceramics, and more specifically relates to a BCSLTM-SA composite microwave dielectric ceramic and a preparation method thereof. Background technique [0002] With the continuous development of modern communication technology, people have higher and higher requirements for the miniaturization, high performance and low cost of mobile communication equipment. This trend largely depends on the dielectric constant of the microwave dielectric ceramic material used. At the same resonant frequency, the larger the dielectric constant, the smaller the wavelength, and the smaller the size of the corresponding dielectric resonator. At the same time, the greater the dielectric constant, the more concentrated the electromagnetic energy is in the medium, and the less affected by the surrounding environment. Therefore, high dielectric constant microwave dielectric ceramic materials (dielectric const...

Claims

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Application Information

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IPC IPC(8): C04B35/468C04B35/50
Inventor 殷旺吴悦广马才兵吕开明
Owner GUANGDONG GOVA ADVANCED MATERIAL TECH
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