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Method for preparing BaCaV2O7 microwave dielectric ceramic material at low temperature

A technology of microwave dielectric ceramics and low temperature, which is applied in the field of preparation of inorganic non-metallic materials, can solve the problems of long time and high preparation temperature, and achieve the effects of high activity, good dispersion and reduced energy consumption

Pending Publication Date: 2021-04-09
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention mainly solves the problems of high preparation temperature and long time in the prior art, and provides a new microwave dielectric ceramic material and its preparation method, which can effectively solve the problem of long-time high-temperature calcination in the existing preparation method to prepare BaCaV 2 o 7 Problems with Microwave Dielectric Ceramic Materials

Method used

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  • Method for preparing BaCaV2O7 microwave dielectric ceramic material at low temperature
  • Method for preparing BaCaV2O7 microwave dielectric ceramic material at low temperature
  • Method for preparing BaCaV2O7 microwave dielectric ceramic material at low temperature

Examples

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Effect test

Embodiment 1

[0031] According to Ba(NO 3 ) 2 , Ca(NO 3 ) 2 4H 2 O, NH 4 VO 3 , citric acid (C 6 h 8 o 7 ·H 2 O) The ratio of the amount of substance is 1:1:2:6 and takes by weighing 2.672g Ba(NO 3 ) 2 , 2.414g Ca(NO 3 ) 2 4H 2 O, 2.392g NH 4 VO 3 and 12.891g citric acid (C 6 h 8 o 7 ·H 2 O). Ca(NO 3 ) 2 4H 2 O, Ba(NO 3 ) 2 Dissolve in 80ml deionized water in turn, and stir continuously at room temperature until a milky white mixed solution is formed, which is set as solution A. Citric acid (C 6 h 8 o 7 ·H 2 O) Dissolve in 40ml deionized water, stir continuously at room temperature until dissolved to form a colorless and transparent aqueous solution of citric acid, which is set as solution B. Will NH 4 VO 3Add 80ml of deionized water and keep stirring in a water bath at 85°C until it dissolves to form a light yellow transparent solution, which is called solution C. Then solutions A and B were slowly added to solution C in turn, stirred in a water bath at 85°...

Embodiment 2

[0033] The difference between this embodiment and Example 1 is: to prepare 1g BaCaV 2 o 7 As the standard, the water bath temperature is 80°C, and the calcination temperature is 650°C. The specific implementation process is as follows:

[0034] According to Ba(NO 3 ) 2 , Ca(NO 3 ) 2 4H 2 O, NH 4 VO 3 , citric acid (C 6 h 8 o 7 ·H 2 (O) The ratio of the amount of substance is 1:1:2:6 and takes by weighing 0.668g Ba (NO 3 ) 2 , 0.604g Ca(NO 3 ) 2 4H 2 O, 0.598g NH 4 VO 3 and 3.222g citric acid (C 6 h 8 o 7 ·H 2 O). Ca(NO 3 ) 2 4H 2 O, Ba(NO 3 ) 2 Dissolve in 20ml of deionized water in turn, and stir continuously at room temperature until a milky white mixed solution is formed, which is set as solution A. Citric acid (C 6 h 8 o 7 ·H 2 O) dissolved in 10ml of deionized water, stirred continuously at room temperature until dissolved to form a colorless and transparent citric acid aqueous solution, which was set as solution B. Will NH 4 VO 3 Add 20...

Embodiment 3

[0036] The difference between this embodiment and embodiment 1, 2 is: to prepare 2g BaCaV 2 o 7 As the standard, the calcination temperature is 700°C, and the specific implementation process is as follows:

[0037] According to Ba(NO 3 ) 2 , Ca(NO 3 ) 2 4H 2 O, NH 4 VO 3 , citric acid (C 6 h 8 o 7 ·H 2 O) The ratio of the amount of substance is 1:1:2:6 and takes by weighing 1.336g Ba (NO 3 ) 2 , 1.207g Ca(NO 3 ) 2 4H 2 O, 1.196g NH 4 VO 3 and 6.445g citric acid (C 6 h 8 o 7 ·H 2 O). Ca(NO 3 ) 2 4H 2 O, Ba(NO 3 ) 2 Dissolve in 40ml of deionized water in turn, and stir continuously at room temperature until a milky white mixed solution is formed, which is called solution A. Citric acid (C 6 h 8 o 7 ·H 2 O) dissolved in 20ml of deionized water, stirred continuously at room temperature until dissolved to form a colorless and transparent citric acid aqueous solution, which was set as solution B. Will NH 4 VO 3 Add 40ml of deionized water and keep ...

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Abstract

The invention provides a method for preparing a BaCaV2O7 microwave dielectric ceramic material at a low temperature, and belongs to the technical field of preparation of inorganic non-metallic materials. The preparation method comprises the following steps: by taking Ba(NO3)2, Ca(NO3)2.4H2O, NH4VO3 and citric acid as raw materials, respectively dissolving the raw materials in water at room temperature or under a water bath condition to form a solution A, a solution B and a solution C, mixing the solutions, and continuously heating and stirring to prepare blue sol; and drying and grinding the blue sol and calcining the blue sol for a short time at a certain temperature to obtain the BaCaV2O7 material. According to the method, high-purity powder is prepared at low temperature through specific raw material composition and a preparation way, the calcining time is short, the obtained powder is small in particle size, the process is stable and simple, the reproducibility is good, and the method has a very good application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic materials, in particular to a method for preparing microwave dielectric ceramic materials at low temperature. Background technique [0002] In recent years, one of the branches of microwave dielectric ceramics: low-temperature co-fired ceramics (LTCC) is easy to realize miniaturization, high integration, excellent high-frequency communication characteristics, etc., and it is easy to realize high-density circuit interconnection, IC packaging and wireless Basic technologies such as embedding in source components have received extensive attention. Because the melting point of the electrode metal inside the microwave dielectric ceramic is low (such as Ag, its melting point is 961°C), the required material needs to have a low sintering temperature (<961°C) and chemical compatibility with the silver electrode. However, at present, most microwave dielectric ceramic mater...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622C04B35/624
CPCC04B35/495C04B35/622C04B35/624C04B2235/3208C04B2235/3215C04B2235/6567
Inventor 王立秋卢美锦
Owner DALIAN UNIV OF TECH
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