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Low-temperature sintering microwave medium ceramic material and preparation method thereof

A low-temperature sintering technology for microwave dielectric ceramics, applied in the field of functional ceramics, can solve the problems of small Qf value and large dielectric loss, and achieve the effect of no pollution in the process, simple process, and excellent microwave dielectric properties

Active Publication Date: 2018-11-20
ZIBO YUHAI ELECTRONICS CERAMIC
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A big limitation of these materials is the small Qf value and high dielectric loss

Method used

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  • Low-temperature sintering microwave medium ceramic material and preparation method thereof
  • Low-temperature sintering microwave medium ceramic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-8

[0035] Using chemical raw material Bi with a purity greater than 99.9% 2 o 3 、WO 3 , TeO 2 Preparation of BiW 0.5 Te 3 o 12 Microwave dielectric ceramics, the specific implementation is as follows:

[0036] (1) will Bi 2 o 3 、WO 3 , TeO 2 Weigh the ingredients according to the molar ratio of 1:0.5:3, specifically weigh 3.9908 grams of Bi 2 o 3 , 1.9856 g WO 3 , 9.0236 g TeO 2 After mixing, the raw materials are added to the nylon tank, and ball milled for 4 to 6 hours. The specific ball milling time of Examples 1-8 is shown in Table 1; the ball milled raw materials are placed in an infrared drying oven to dry and sieve;

[0037] (2) Calcining the sieved raw materials at 400° C. for 3 hours;

[0038] (3) adding a mass percentage of 5% PVA aqueous solution to the calcined powder for granulation, sieving after drying, and pressing into a cylindrical shape of Φ12mm×6mm with a powder tablet press;

[0039] (4) sintering the cylinder of step (3) at 480-530° C., and ke...

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Abstract

The invention belongs to the field of functional ceramics and in particular relates to a low-temperature sintering microwave medium ceramic material and a preparation method thereof. The material hasa chemical formula of BiW0.5Te3Ol2. The low-temperature sintering microwave medium ceramic material provided by the invention has an ultralow sintering temperature (480-530 DEG C), a low dielectric constant (26-30), a high-quality factor (6,754-13,120GHz), and a negative frequency temperature coefficient (minus 86-197*10<6> / DEG C), can be applied to an MLCC (Multiplayer Ceramic Chip Capacitor) compensation type substrate material, has good commercial values, and can be used as an MLCC compensation substrate material. The invention further provides a preparation method. The material is simple in process, free of pollution in the process, applicable to industrial production and wide in application prospect.

Description

technical field [0001] The invention belongs to the field of functional ceramics, in particular to a low-temperature sintered microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] With the further expansion of the operating frequency of communication equipment to the high-frequency range, especially after entering the millimeter wave band, the dielectric loss of the material increases significantly, and the signal transmission delay time is longer (the signal delay time is proportional to the dielectric constant), and the signal attenuation problem Prominent (large dielectric loss, low Qf, large signal attenuation). It is of great significance to develop microwave dielectric ceramics with low dielectric constant and high Qf value. In addition, with the development of microwave components to high frequency, miniaturization, multi-function, high reliability, and low cost, LTCC technology has gradually become the preferred method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/01C04B35/622
CPCC04B35/01C04B35/622C04B2235/3258C04B2235/3298
Inventor 孙兆海张静孙琳斐
Owner ZIBO YUHAI ELECTRONICS CERAMIC
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