Low-loss high-strength microwave medium ceramic and preparing method thereof

A microwave dielectric ceramic and high-intensity microwave technology is applied in the field of electronic ceramics and its preparation, which can solve the problems of high dielectric constant, low quality factor, unattainable processing strength, etc., and achieves improved sintering temperature, temperature stability, loss low effect

Active Publication Date: 2019-11-15
无锡鑫圣慧龙纳米陶瓷技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, for this type of perovskite structure, microwave dielectric ceramics have a dielectric constant of 50 and a quality factor of about 40,000 GHz when the resonant frequency temperature coefficient is zero, which is too high for current 5G applications. The factor is low and its processing strength cannot reach the standard of microwave dielectric ceramics for 5G

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  • Low-loss high-strength microwave medium ceramic and preparing method thereof

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[0024] The present invention also provides a method for preparing low-loss high-strength microwave dielectric ceramics, comprising the following steps:

[0025] (1) TiO 2 and CaCO 3 According to the chemical formula CaTiO 3 The molar ratio of the corresponding elements in the ingredients, the TiO 2 and CaCO 3 After mixing, it is fully ball milled, dried and sieved after ball milling, and then put into a corundum crucible for roasting to obtain CaTiO 3 combination;

[0026] (2) will Sm 2 o 3 and Al 2 o 3 According to the chemical formula SmAlO 3 The molar ratio of the corresponding elements in the ingredients, the Sm 2 o 3 and Al 2 o 3 After mixing, it is fully ball milled, dried and sieved after ball milling, and then put into a corundum crucible for roasting to obtain SmAlO 3 combination;

[0027] (3) TiO 2 , CaCO 3 、Sm 2 o 3 、Al 2 o 3 According to the chemical formula CaSmAlTiO 6 The molar ratio of the corresponding elements in the ingredients, the TiO ...

Embodiment 1

[0036] The preparation method of the low-loss high-strength microwave dielectric ceramic of the present embodiment 1 comprises the following steps:

[0037] (1) TiO 2 and CaCO 3 According to the chemical formula CaTiO 3 The molar ratio of the corresponding elements in the ingredients, the TiO 2 and CaCO 3 After mixing, fully ball mill, dry and sieve after ball milling, then put it into a corundum crucible, and roast at 1100°C for 4 hours to obtain CaTiO 3 combination;

[0038] (2) TiO 2 , CaCO 3 、Sm 2 o 3 、Al 2 o 3 According to the chemical formula CaSmAlTiO 6 The molar ratio of the corresponding elements in the ingredients, the TiO 2 , CaCO 3 、Sm 2 o 3 、Al 2 o 3 After mixing, it is fully ball milled, dried and sieved after ball milling, then put into a corundum crucible, and roasted at 1100 ° C for 4 hours to obtain the chemical formula CaSmAlTiO 6 Compositions;

[0039] (4) CaTiO will be obtained 3 Composition and CaSmAlTiO 6 Composition according to che...

Embodiment 2

[0042] The preparation method of the low-loss high-strength microwave dielectric ceramic of the present embodiment 2 comprises the following steps:

[0043] (1) TiO 2 and CaCO 3 According to the chemical formula CaTiO 3 The molar ratio of the corresponding elements in the ingredients, the TiO 2 and CaCO 3 After mixing, fully ball mill, dry and sieve after ball milling, then put it into a corundum crucible, and roast at 1100°C for 4 hours to obtain CaTiO 3 combination;

[0044] (2) will Sm 2 o 3 and Al 2 o 3 According to the chemical formula SmAlO 3 The molar ratio of the corresponding elements in the ingredients, the Sm 2 o 3 and Al 2 o 3 After mixing, fully ball mill, dry and sieve after ball milling, then put it into a corundum crucible, and roast at 1100°C for 4h to obtain SmAlO 3 combination;

[0045] (3) TiO 2 , CaCO 3 、Sm 2 o 3 、Al 2 o 3 According to the chemical formula CaSmAlTiO 6 The molar ratio of the corresponding elements in the ingredients, t...

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Abstract

The invention discloses low-loss high-strength microwave medium ceramic. The composition expression of the ceramic is xCaTiO3-ySmAlO3-(1-x-y)CaSmAlTiO6, wherein x, y and (1-x-y) each represent a molarratio, x is 0.6, y is larger than or equal to 0 and smaller than 0.4. The invention further discloses a preparing method of the low-loss high-strength microwave medium ceramic. In the microwave medium ceramic, SmAlO3 is partly or overall replaced with CaSmAlTiO6, and therefore the dielectric constant can be reduced, and the temperature stability can be improved; by increasing the sintering temperature, the processing intensity of the ceramic is increased; the CaSmAlTiO6 and the SmAlO3 have the similar dielectric constants, but the CaSmAlTiO6 has the resonant frequency temperature coefficientcloser to zero and the higher hardness, so the high-hardness ceramic material with the dielectric constant of about 35, the low loss and the resonant frequency temperature coefficient close to zero can be obtained by partly or overall replacing the SmAlO3 with the CaSmAlTiO6 and adjusting the ratio of the components.

Description

technical field [0001] The invention belongs to the technical field of electronic ceramics and its preparation, and in particular relates to a low-loss high-strength microwave dielectric ceramic and a preparation method thereof. Background technique [0002] Microwave dielectric ceramics refer to ceramics used in microwave frequency band circuits as dielectric materials to complete one or more functions. They are widely used in modern communications, ranging from satellite communications and satellite remote sensing devices to mobile communications, GPS navigation, Television cable systems, etc., have become an indispensable part of modern people's lives. With the rapid development of microwave communication, especially in the coming 5G era, the developed microwave dielectric material loss, temperature stability and processing strength cannot meet the future application requirements, so it is necessary to develop suitable dielectric constant, Microwave dielectric material w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/465C04B35/622C04B35/63
CPCC04B35/465C04B35/622C04B35/6303C04B2235/3208C04B2235/3232C04B2235/3217C04B2235/3224C04B2235/656C04B2235/6567C04B2235/602
Inventor 吉岸王丹王晓慧
Owner 无锡鑫圣慧龙纳米陶瓷技术有限公司
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