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Microwave dielectric ceramic and preparation method thereof

A technology of microwave dielectric ceramics and a manufacturing method, applied in the field of ceramic materials, can solve the problems of limited commercial application and high price, and achieve the effects of good microwave dielectric properties, low price and low price

Inactive Publication Date: 2021-05-07
苏州研资工业技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the rare earth oxide Nd 2 o 3 The price is relatively expensive, which limits the commercial application of this material to a certain extent

Method used

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  • Microwave dielectric ceramic and preparation method thereof
  • Microwave dielectric ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1): according to a certain molar ratio, CaO, SrO, Y 2 o 3 , Nb 2 o 5 and TiO 2 The oxide is fully mixed with deionized water and dispersant;

[0027] Step 2): ball milling the above mixture for 8 hours, the particle size of the balls is 0.5 μm;

[0028] Step 3): After ball milling, dry at 90°C-120°C for 8 hours, then calcinate at 1000-1200°C for 4-5 hours, cool down to room temperature naturally, import into a pulverizer for crushing, and pass through a 40-mesh sieve to obtain powder A;

[0029] Step 4): According to a certain molar ratio, powder A, deionized water, dispersant, plasticizer, and release agent are assembled and sprayed to obtain powder B;

[0030] Step 5): After adding an appropriate amount of binder (5wt% polyvinyl alcohol solution) to the above-mentioned powder B to granulate, the powder is put into a mold, pressed under a pressure of 100 MPa, and then placed in a high-temperature furnace. Under the air atmosphere, debinding treatment for 2 ...

Embodiment 2

[0033] Step 1): According to a certain molar ratio, CaO, SrO, Nd 2 o 3 , Nb 2 o 5 and TiO 2 The oxide is fully mixed with deionized water and dispersant;

[0034] Step 2): ball milling the above mixture for 8 hours, the particle size of the balls is 0.5 μm;

[0035] Step 3): After ball milling, dry at 90°C-120°C for 8 hours, then calcinate at 1000-1200°C for 4-5 hours, cool down to room temperature naturally, import into a pulverizer for crushing, and pass through a 40-mesh sieve to obtain a powder A;

[0036] Step 4): According to a certain molar ratio, powder A, deionized water, dispersant, plasticizer, and release agent are assembled and sprayed to obtain powder B;

[0037] Step 5): After adding an appropriate amount of binder (5wt% polyvinyl alcohol solution) to the above-mentioned powder B to granulate, the powder is put into a mold, pressed under a pressure of 100 MPa, and then placed in a high-temperature furnace. Under the air atmosphere, debinding treatment for...

Embodiment 3

[0040] Step 1): According to a certain molar ratio, CaO, SrO, Sm 2 o 3 , Nb 2 o 5 and TiO 2 The oxide is fully mixed with deionized water and dispersant;

[0041] Step 2): ball milling the above mixture for 8 hours, the particle size of the balls is 0.5 μm;

[0042] Step 3): After ball milling, dry at 90°C-120°C for 8 hours, then calcinate at 1000-1200°C for 4-5 hours, cool down to room temperature naturally, import into a pulverizer for crushing, and pass through a 40-mesh sieve to obtain a powder A;

[0043] Step 4): According to a certain molar ratio, powder A, deionized water, dispersant, plasticizer, and release agent are assembled and sprayed to obtain powder B;

[0044] Step 5): After adding an appropriate amount of binder (5wt% polyvinyl alcohol solution) to the above-mentioned powder B to granulate, the powder is put into a mold, pressed under a pressure of 100 MPa, and then placed in a high-temperature furnace. Under the air atmosphere, debinding treatment for...

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Abstract

The invention discloses a microwave dielectric ceramic and a preparation method thereof, the chemical composition expression of the ceramic is aCaO.bSrO.cLn2O3.dNb2O5.eTiO2 (I), and Ln is equal to Y, Nd or Sm. The microwave dielectric ceramic contains rare earth element oxides of Y, Nd or Sm, and has good microwave dielectric properties, and the microwave dielectric ceramic obtained by sintering the two rare earth element oxides, Nb2O5 and TiO2 and performing combined action has good microwave dielectric properties.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a microwave dielectric ceramic and a preparation method thereof. Background technique [0002] Filters and resonators are needed in mobile communication base station systems, and the core raw material for producing filters and resonators is microwave dielectric ceramic powder with a dielectric constant of 45 and a Q×F value of more than 40,000. The ceramic powder is mainly used in microwave components such as resonators, filters, dielectric antennas, and dielectric waveguide circuits, and can be used in mobile communications, satellite communications, and military radars. With the rapid development of science and technology, the rapid increase in the amount of communication information, and people's requirements for wireless communication, the use of microwave communication systems such as satellite communication and satellite live TV has become an inevitable trend in the develop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/46C04B35/622
CPCC04B35/46C04B35/622C04B2235/3208C04B2235/3213C04B2235/3224C04B2235/3251C04B2235/3225C04B2235/5445C04B2235/602C04B2235/656
Inventor 张倩
Owner 苏州研资工业技术有限公司
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