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A high q temperature stable microwave dielectric ceramic material and its preparation method and application

A microwave dielectric ceramic and temperature-stable technology, which is applied in high-Q temperature-stable microwave dielectric ceramic materials and its preparation, ceramic materials and their preparation fields, can solve the problems of unsatisfactory use requirements and low quality factor, and achieve high practicality Application value, high fault tolerance rate, and reliable production process

Active Publication Date: 2022-03-04
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the microwave dielectric ceramics of the prior art, there are many cases of temperature stability, but the quality factor is low, which cannot meet the higher use requirements

Method used

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  • A high q temperature stable microwave dielectric ceramic material and its preparation method and application
  • A high q temperature stable microwave dielectric ceramic material and its preparation method and application
  • A high q temperature stable microwave dielectric ceramic material and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0027] According to the chemical formula Ce 0.5 Y 0.5 o 1.75 The stoichiometric ratio of each element in, respectively weighing CeO 2 (analytical pure), Y 2 o 3 (Analytical pure) chemical reagent; put the weighed powder into a ball mill tank, use absolute ethanol as the ball mill medium, and ball mill and mix for 6 hours; the raw materials after ball milling are dried and sieved, and then put into an alumina crucible , using a muffle furnace to heat to 1400 ° C for 4 hours; ball mill the calcined powder for 24 hours again, dry, sieve, add paraffin and stir fry, and pass through an 80-mesh sieve; pour an appropriate amount of powder into the mold, use A powder tablet press is used to make a cylindrical sample of φ10mm×5mm under a pressure of 200MPa; finally, the sample is put into a high-temperature box furnace for sintering, the sintering temperature is 1450°C, the heating rate is 5°C / min, and the temperature is kept for 4 hours. Made Ce 0.5 Y 0.5 o 1.75 Microwave diel...

Embodiment 6

[0036] According to the chemical formula Ce 0.75 Y 0.25 o 1.875 The stoichiometric ratio of each element in, respectively weighing CeO 2 (analytical pure), Y 2 o 3 (Analytical pure) chemical reagent; put the weighed powder into a ball mill tank, use absolute ethanol as the ball mill medium, and ball mill and mix for 6 hours; the raw materials after ball milling are dried and sieved, and then put into an alumina crucible , using a muffle furnace to heat to 1400 ° C for 4 hours; ball mill the calcined powder for 24 hours again, dry, sieve, add paraffin and stir fry, and pass through an 80-mesh sieve; pour an appropriate amount of powder into the mold, use A powder tablet press is used to make a cylindrical sample of φ10mm×5mm under a pressure of 200MPa; finally, the sample is put into a high-temperature box furnace for sintering, the sintering temperature is 1400°C, the heating rate is 5°C / min, and the temperature is kept for 4 hours. Made Ce 0.75 Y 0.25 o 1.875 Microwav...

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Abstract

The invention discloses a high-Q temperature-stable microwave dielectric ceramic material and its preparation method and application. Its chemical formula is Ce x Y 1‑x o 1.5+x / 2 , (x=0.5, 0.75), where x is the molar doping amount of Y. The microwave dielectric ceramic prepared by the solid phase reaction method of the present invention has a sintering temperature of 1400-1550°C and a density of 5.652-6.054g / cm 3 , the dielectric constant is 19.25~20.46, the quality factor is 65600~149290GHz, and the resonant frequency temperature coefficient is ‑29.8~‑13.52ppm / ℃. Components made of the microwave dielectric ceramic not only have more stable performance and service life, but also have stronger thermal stability to reduce signal propagation errors. At the same time, the preparation process of the present invention is reliable, simple in operation, high in fault tolerance, suitable for industrial production, and has high practical application value.

Description

technical field [0001] The invention relates to a ceramic material and a preparation method thereof, in particular to a high-Q temperature-stable microwave dielectric ceramic material and a preparation method and application thereof, which are applied in the field of electronic information materials and components. Background technique [0002] Microwave dielectric material is a new type of information functional material developed based on microwave communication technology in the early 1980s, and it is one of the research hotspots in the field of electronic functional materials at home and abroad. The performance of microwave dielectric materials is usually evaluated by dielectric constant (εr), quality factor (Q×f) (where f is the resonant frequency, Q is the reciprocal of loss tangent), and resonant frequency temperature coefficient (τf). Among them, the quality factor directly affects the quality and energy loss of microwave components, thereby affecting the performance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/50C04B35/505C04B35/622
CPCC04B35/50C04B35/505C04B35/622C04B2235/77
Inventor 夏往所唐天良李福生邓静瑜王莹石礼伟
Owner CHINA UNIV OF MINING & TECH