Low dielectric and low loss boride LTCC material and preparation method thereof

A boride, low-loss technology, applied in the field of microwave dielectric ceramics, can solve the problems of harmful environment, high cost, electrode reaction, etc., and achieve the effects of improving stability, stable preparation method, and high commercial value

Active Publication Date: 2022-03-15
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of high raw material cost of low-temperature sintered ceramics, harmful to the environment and easy electrode reaction, and provide a low-dielectric, low-loss boride LTCC material and its preparation method. The main crystal phase of the material is AB B 5 o 9 ( A = Li, Na; B =Sr, Ba, Ca), has the advantages of low cost, low sintering temperature, low dielectric constant, low dielectric loss, stable preparation process, etc.

Method used

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  • Low dielectric and low loss boride LTCC material and preparation method thereof
  • Low dielectric and low loss boride LTCC material and preparation method thereof

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Effect test

Embodiment 1

[0023] Step 1, preparation by hydrothermal method AB B 5 o 9 Powder: as SrCO 3 、BaCO 3 ,, CaCO 3 、NaNO 3 、LiNO 3 , and H 3 BO 3 High-purity powder is used as raw material, according to the chemical expression AB B 5 o 9 Carry out weighing batching to form mixed powder, mixed powder is dissolved in deionized water, prepares to obtain the mixed solution that mass concentration is 10%; Then add dehydrated alcohol and silane coupling agent in mixed solution, wherein dehydrated alcohol accounts for total mixed solution The volume of the solution is 30%, and the silane coupling agent accounts for 10% of the total volume of the mixed solution; the mixed solution is transferred to a high-pressure reactor, and the temperature is gradually raised to 120°C for 24 hours, cooled to room temperature, and circulated with deionized water and absolute ethanol Wash by centrifugation for three times, and dry at 90°C for 4 hours to obtain AB B 5 o 9 powder.

[0024] Step 2, ball...

Embodiment 2

[0031] Step 1, preparation by hydrothermal method AB B 5 o 9 Powder: as SrCO 3 、BaCO 3 ,, CaCO 3 、NaNO 3 、LiNO 3 , and H 3 BO 3 High-purity powder is used as raw material, according to the chemical expression AB B 5 o 9Carry out weighing batching to form mixed powder, mixed powder is dissolved in deionized water, prepares to obtain the mixed solution that mass concentration is 10%; Then add dehydrated alcohol and silane coupling agent in mixed solution, wherein dehydrated alcohol accounts for total mixed solution The volume of the solution is 30%, and the silane coupling agent accounts for 10% of the total volume of the mixed solution; the mixed solution is transferred to a high-pressure reactor, and the temperature is gradually raised to 150 ° C for 12 hours, cooled to room temperature, and circulated with deionized water and absolute ethanol Wash by centrifugation for three times, and dry at 90°C for 4 hours to obtain AB B 5 o 9 powder.

[0032] Step 2, bal...

Embodiment 3

[0039] Step 1, preparation by hydrothermal method AB B 5 o 9 Powder: as SrCO 3 、BaCO 3 ,, CaCO 3 、NaNO 3 、LiNO 3 , and H 3 BO 3 High-purity powder is used as raw material, according to the chemical expression AB B 5 o 9 Carry out weighing batching to form mixed powder, mixed powder is dissolved in deionized water, prepares to obtain the mixed solution that mass concentration is 10%; Then add dehydrated alcohol and silane coupling agent in mixed solution, wherein dehydrated alcohol accounts for total mixed solution The volume of the solution is 30%, and the silane coupling agent accounts for 10% of the total volume of the mixed solution; the mixed solution is transferred to a high-pressure reactor, and the temperature is gradually raised to 130°C for 18 hours, cooled to room temperature, and circulated with deionized water and absolute ethanol Wash by centrifugation for three times, and dry at 90°C for 4 hours to obtain AB B 5 o 9 powder.

[0040] Step 2, ball...

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Abstract

The invention discloses a low dielectric and low loss boride LTCC material and a preparation method thereof, the chemical expression of the boride LTCC material is ABB5O9, in the formula, A is Li or Na; b is Sr, Ba or Ca. The preparation process of the boride LTCC material sequentially comprises the following steps: preparing ABB5O9 powder by a hydrothermal method, carrying out ball milling, carrying out compression molding, and sintering to form ceramic. The main crystal phase of the prepared ABB5O9-based LTCC material is ABB5O9 (A = Li and Na, and B = Sr, Ba and Ca) single phase, and the ABB5O9-based LTCC material has the advantages of low raw material cost, low sintering temperature (700-825 DEG C), low dielectric constant (4.3-8.5), high Qf value (10500-58850 GHz), simple preparation process, good reproducibility and the like, can solve the time delay problem of microwave signals in high-frequency communication, improves the stability of microwave signal transmission, and is very suitable for being used as an LTCC microwave substrate.

Description

technical field [0001] The invention belongs to the field of microwave dielectric ceramics, in particular to a low-dielectric, low-loss boride LTCC material and a preparation method thereof. Background technique [0002] With the development of microwave components in the direction of miniaturization, integration, and millimeter wave and the requirements of electronic packaging technologies such as LTCC, the performance requirements for microwave dielectric ceramic materials are increasing. At present, most of the commercial microwave dielectric ceramic materials on the market have relatively high sintering temperature, and it is necessary to add sintering aids to reduce the sintering temperature, but this will damage the microwave dielectric properties of the material. Therefore, the development of low-dielectric microwave dielectric materials with inherently low heating temperature and excellent microwave dielectric properties is of great significance for expanding the LTC...

Claims

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Application Information

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IPC IPC(8): C04B35/01C04B35/622C04B35/626C04B35/64
CPCC04B35/01C04B35/62605C04B35/622C04B35/64C04B2235/3201C04B2235/3213C04B2235/3215C04B2235/3409C04B2235/656C04B2235/96
Inventor 吕学鹏
Owner NANJING INST OF TECH
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