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High performance microwave dielectric ceramic material with low dielectric constant as well as preparation method and application of ceramic material

A technology of microwave dielectric ceramics and low dielectric constant is applied in the fields of low dielectric constant and high performance microwave dielectric ceramic materials, preparation, ceramic materials and their preparation. Cost and other issues, to achieve the effect of reducing the defective rate and overall manufacturing cost, the preparation process is simple, and the preparation process is reliable.

Active Publication Date: 2018-12-21
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research system of low dielectric constant microwave dielectric ceramics mainly includes Al 2 o 3 , Mg 2 SiO 4 , Y 2 BaCuO 5 And other systems, although some have a lower dielectric constant, but the quality factor is low, which cannot meet higher requirements for use
[0004] In addition, the current preparation process of microwave dielectric ceramic materials is relatively cumbersome, and the process requirements are extremely strict. Once deviations occur in the preparation process, the product will be scrapped, which directly increases the manufacturing cost.

Method used

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  • High performance microwave dielectric ceramic material with low dielectric constant as well as preparation method and application of ceramic material
  • High performance microwave dielectric ceramic material with low dielectric constant as well as preparation method and application of ceramic material
  • High performance microwave dielectric ceramic material with low dielectric constant as well as preparation method and application of ceramic material

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Experimental program
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Effect test

Embodiment 1

[0029] According to the chemical formula SmNbO 4 The stoichiometric ratio of each element in -0.5MgO, respectively weighed Sm 2 o 3 (Analytical pure) 13.3146g, Nb 2 o 5 (analytical pure) 10.1468g, MgO (analytical pure) 1.5386g; weigh the powder by Sm 2 o 3 , MgO, Nb 2 o 5 Sequentially put into ball milling tanks, use absolute ethanol as the ball milling medium, and ball mill and mix for 6 hours; after ball milling, the raw materials are dried and sieved, put into alumina crucibles, and heated to 1100°C in a muffle furnace for calcination for 2 hours; The calcined powder was ball milled again with absolute ethanol as the ball milling medium for 24 hours, dried, sieved, added paraffin and fried evenly, and passed through an 80-mesh sieve; poured an appropriate amount of powder into the mold, and used a powder tablet press at 200MPa A cylindrical sample of φ10mm×5mm was made under a certain pressure; finally, the sample was put into a high-temperature box furnace for sinte...

Embodiment 7

[0037] According to the chemical formula SmNbO 4 The stoichiometric ratio of each element in -1MgO, respectively weighed Sm 2 o 3 (Analytical pure) 12.5427g, Nb 2 o 5 (analytical pure) 9.5585g, MgO (analytical pure) 2.8987g; weigh the powder by Sm 2 o 3 , MgO, Nb 2 o 5 Sequentially put into ball milling tanks, use absolute ethanol as the ball milling medium, and ball mill and mix for 6 hours; after ball milling, the raw materials are dried and sieved, put into alumina crucibles, and heated to 1100°C in a muffle furnace for calcination for 2 hours; The calcined powder was ball milled again with absolute ethanol as the ball milling medium for 24 hours, dried, sieved, added paraffin and fried evenly, and passed through an 80-mesh sieve; poured an appropriate amount of powder into the mold, and used a powder tablet press at 200MPa A cylindrical sample of φ10mm×5mm was made under a certain pressure; finally, the sample was put into a high-temperature box furnace for sinterin...

Embodiment 13

[0043] According to the chemical formula SmNbO 4 The stoichiometric ratio of each element in -2MgO, respectively weighed Sm 2 o 3 (Analytical pure) 11.2395g, Nb 2 o 5 (analytical pure) 8.5654g, MgO (analytical pure) 5.1951g; 2 o 3 , MgO, Nb 2 o 5 Sequentially put into ball milling tanks, use absolute ethanol as the ball milling medium, and ball mill and mix for 6 hours; after ball milling, the raw materials are dried and sieved, put into alumina crucibles, and heated to 1100°C in a muffle furnace for calcination for 2 hours; The calcined powder was ball milled again with absolute ethanol as the ball milling medium for 24 hours, dried, sieved, added paraffin and fried evenly, and passed through an 80-mesh sieve; poured an appropriate amount of powder into the mold, and used a powder tablet press at 200MPa A cylindrical sample of φ10mm×5mm was made under a certain pressure; finally, the sample was put into a high-temperature box furnace for sintering, the sintering temper...

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Abstract

The invention discloses a high performance microwave dielectric ceramic material with a low dielectric constant as well as a preparation method and application of the ceramic material. The chemical formula is SmNbO4-xMgO, wherein x is the molar addition amount of MgO, and the x is more than or equal to 0.5 and less than or equal to 5. The multiphase microwave dielectric ceramic is obtained by adding the proper amount of MgO in to SmNbO4 ceramic and carrying out a solid phase reaction. Finally, a series of microwave dielectric ceramic materials with low dielectric constants and high quality factors are provided. The series of ceramic materials have a sintering temperature range of 1425-1550 DEG C, the dielectric constants of the ceramic materials are 13.27-17.87, and the quality factors ofthe ceramic materials are 87306-189978GHz. The preparation process provided by the invention is simple to operate, reliable in process, larger in optional parameter range during sintering, controllable, and higher in fault tolerance rate; the prepared microwave dielectric ceramic material has the dielectric constant epsilon r of 18 or less, and the quality factor is significantly improved; the microwave dielectric ceramic material can be applied to the manufacture of higher-end microwave components.

Description

technical field [0001] The invention relates to a ceramic material and a preparation method thereof, in particular to a low-permittivity high-performance microwave dielectric ceramic material, a preparation method and an application thereof, belonging to the field of electronic information materials and components. Background technique [0002] Microwave dielectric ceramics refer to ceramics that are used as dielectric materials in microwave (mainly UHF and SHF frequency bands, 300MHz to 300GHz) circuits and perform one or more functions. Microwave dielectric ceramics have the characteristics of low microwave loss and high dielectric constant, and have become one of the key materials for microwave technology applications. Various microwave devices made of microwave dielectric ceramics, such as dielectric resonators, filters and microwave dielectric antennas, are widely used. in various fields of microwave technology. [0003] Low dielectric constant microwave dielectric cer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/04C04B35/622
CPCC04B35/04C04B35/495C04B35/622C04B2235/3224
Inventor 夏往所张少波唐天良王莹石礼伟
Owner CHINA UNIV OF MINING & TECH
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