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Microwave dielectric ceramic powder and preparation method thereof

A technology of microwave dielectric ceramics and powders, applied in ceramics, inorganic insulators, etc., can solve the problems of restricting product production conditions and high sintering temperature, and achieve the effects of simple composition and preparation, improved quality coefficient, and good dielectric properties

Active Publication Date: 2014-01-01
BEIJING YUANLIU HONGYUAN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there is the disadvantage of high sintering temperature (above 1300 degrees Celsius), so in actual production and use, the production conditions of the product are restricted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The invention provides a microwave dielectric ceramic powder and a preparation method thereof, specifically ZnO-MgO-TiO doped with 85-96% by weight of strontium and cobalt 2 The ternary system microwave dielectric material is composed of 4-15% by weight zinc barium borosilicate flux.

[0018] Preferably, ZnO, MgO and TiO 2 The molar percentage ratio is 1:2:3.

[0019] Preferably, the strontium and cobalt are doped in a molar percentage of 1.5-6% SrO and 0-7% CoO.

[0020] Preferably, the zinc barium borosilicate flux is composed of 10-50% Li by mole percent 2 O, 10-40% ZnO, 10-30% BaO, 15-40% B 2 o 3 , 10-35% SiO 2 composition.

[0021] Preferably, the composition form of the flux element is an oxide, a carbonate compound and / or a compound.

[0022] At the same time, a method for preparing microwave dielectric ceramic powder is provided, including:

[0023] According to the stoichiometric ratio of the main ceramic powder ZnO: (MgCO 3 ) 4 ·Mg(OH) 2 5H2O:TiO 2...

Embodiment 1

[0028] (1) According to the stoichiometric ratio of the main ceramic powder ZnO: (MgCO 3 ) 4 ·Mg(OH) 2 5H2O:TiO 2 =15:7:50, then doped with 1.5%SrCO 3 , 7% CoCO 3 With the main porcelain powder in alcohol as the medium, after ball milling for 24 hours, it was calcined gently at 800°C for 8 hours;

[0029] (2) According to the stoichiometric ratio of lithium zinc barium borosilicate flux, 50 mol% Li 2 O, 10 mol% ZnO, 10 mol% BaO, 15 mol% B 2 o 3 , 15 mol% SiO 2 . Mix the proportioned oxides and put them into a high-temperature furnace for calcination at 800°C, then cool the molten glass and pulverize it. With de-alcohol as the medium, after ball milling for 6 hours, dry at 120;

[0030] (3) The main powder synthesized in the second ball milling step (2), add 96% by weight of the main powder and 4% by weight of flux according to the stoichiometric ratio, add alcohol according to the weight ratio of powder to alcohol 1:2, and mix Ball milling for 6 hours;

[0031] (4)...

Embodiment 2

[0034] (1) According to the stoichiometric ratio of the main ceramic powder ZnO: (MgCO 3 ) 4 ·Mg(OH) 2 5H2O:TiO 2 =15:7:50, then doped with 2%SrCO 3 , 5% CoCO 3 Mix with the main porcelain powder, use deionized water as the medium, ball mill for 24 hours, then gently calcined at 800°C for 6 hours;

[0035] (2) According to the stoichiometric ratio of lithium zinc barium borosilicate flux, 20 mol% Li 2 O, 40 mol% ZnO, 10 mol% BaO, 10 mol% B 2 o 3 , 20 mol% SiO 2 ,. Mix the proportioned oxides and put them into a high-temperature furnace for calcination at 800°C, then water-quench the molten glass and pulverize it. Using deionized water as the medium, after ball milling for 7 hours, dry at 140°C;

[0036] (3) Secondary ball milling step (2) For the synthesized main powder, add 92% by weight of main powder and 8% by weight of flux according to the stoichiometric ratio, and add deionized powder according to the weight ratio of powder to deionized water 1:2 water, mixed an...

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Abstract

The invention provides microwave dielectric ceramic powder and a preparation method thereof and relates to the field of electronic information materials and elements. The microwave dielectric ceramic powder specifically comprises the following components in percentage by weight: 85-96% of strontium and cobalt doped ZnO-MgO-TiO2 ternary system microwave dielectric material and 4-15% of zinc-barium-boron-silicon fluxing agent. The technical problem to be solved by the invention is to provide the microwave dielectric ceramic powder and the preparation method thereof; and by using the microwave dielectric ceramic powder and the preparation method thereof, the loss is effectively reduced and ceramic can keep excellent dielectric property and have a stable temperature coefficient.

Description

technical field [0001] The invention relates to the technical field of electronic information materials and components, in particular to a microwave dielectric ceramic powder and a preparation method thereof. Background technique [0002] Microwave ceramic capacitors are one of the most widely used and fastest growing electronic components in the world. Microwave ceramic capacitors are mainly used in oscillation, coupling, filtering, and bypass circuits of various military and civilian complete machines. The application fields have been expanded to automatic control instruments, computers, mobile phones, digital appliances, automobiles, electric power and other industries. At present, microwave ceramic capacitors have become an important component of the capacitor market, and the demand in the global market is growing at a rate of nearly 15%. The market demand is huge, and the industrialization market prospect is very broad. [0003] For radio frequency and microwave multi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B3/12
Inventor 杨喻钦陈仁政
Owner BEIJING YUANLIU HONGYUAN ELECTRONICS TECH
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