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A kind of near-zero temperature coefficient low dielectric LTCC material and preparation method thereof

A temperature coefficient, low dielectric technology, applied in the field of microwave electronic ceramic materials and its manufacturing, can solve problems such as difficult to meet the high stability requirements of LTCC microwave/millimeter wave devices, poor temperature coefficient, etc., to achieve high application prospects and value, Effect of low dielectric constant

Active Publication Date: 2022-06-07
YANCHUANG PHOTOELECTRIC TECH GANZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although its Qf value is high, the temperature coefficient is too poor to meet the high stability requirements of LTCC microwave / millimeter wave devices

Method used

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  • A kind of near-zero temperature coefficient low dielectric LTCC material and preparation method thereof
  • A kind of near-zero temperature coefficient low dielectric LTCC material and preparation method thereof

Examples

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Embodiment 1-6

[0020] Examples 1-6 of the present embodiment provide a near-zero temperature coefficient low-medium LTCC material comprising γ-LiAlO 2 and Ba 5 Si 8 O 21 Two-phase mixed ceramic material, and then incorporated with 2 ~ 4wt% of the ceramic material of the two-phase mixed LMBBA glass as a co-solvent sintered, the chemical formula is (1-x) LiAlO2 –xBa 5 Si 8 O 21 –yLMBBA，x＝57～61wt％，y＝2～4wt％； Sintering temperature is 900 °C; The composition of the LMBBA glass is Li 2 CO 3 -MgO-Bi 2 O 3 -B 2 O 3 -Al 2 O 3 。

[0021] thereinto

[0022] The LiAlO 2 The raw material composition includes the following molar ratio of raw materials:

[0023] Li2CO3：Al2O3＝1:1。

[0024] The Ba 5 Si 8 O 21 The raw material composition includes the following molar ratio of raw materials:

[0025] BaCO 3 ：SiO 2 ＝5:8。

[0026] The molar ratio of each component in the LMBBA glass is:

[0027] Li 2 CO 3 :MgO:Bi 2 O 3 :B 2 O 3 :Al 2 O 3 ＝45:5:20:26:4。

[0028] For the convenience of description, put LiAlO 2 Named A ...

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Abstract

The invention provides a near-zero temperature coefficient low dielectric LTCC material and a preparation method thereof, wherein the low dielectric LTCC material contains γ-LiAlO 2 and Ba 5 Si 8 o 21 A two-phase mixed ceramic material is sintered by adding 2 to 4 wt% of the two-phase mixed ceramic material with LMBBA glass as a flux, and the general chemical formula is (1‑x)LiAlO 2 –xBa 5 Si 8 o 21 -yLMBBA, x=57~61wt%, y=2~4wt%; Sintering temperature is 900 ℃; The composition of described LMBBA glass is Li 2 CO 3 ‑MgO‑Bi 2 o 3 -B 2 o 3 ‑Al 2 o 3 . Has a near-zero resonant frequency temperature coefficient (τ f =-6.6~4ppm / °C) and high Qf value characteristics, can be sintered at 900°C to achieve densification, and has a low dielectric constant, which has good application prospects in LTCC integrated substrates and devices.

Description

【Technical field】 [0001] The present invention relates to microwave electronic ceramic materials and the field of manufacture thereof, particularly to a near-zero temperature coefficient low medium LTCC material and a preparation method thereof. 【Background】 [0002] LTCC (LowTemperature Co-fired Ceramic, low-temperature co-firing ceramics) technology is currently the most important and mainstream passive integration technology, which is widely used in defense and military industry, automotive and information products. The core key in LTCC technology is the development of high-performance LTCC materials. With the development of microwave communication technology and radar systems, the available communication frequencies have expanded from microwave to millimeter wave. The high frequency of microwave communication frequencies and large information transmission require that ltcccil materials developed have low dielectric constants (dielectric constants below 8 or less), high Qf val...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/16C04B35/622
CPCC04B35/16C04B35/622C04B2235/3203C04B2235/3217C04B2235/3215C04B2235/3418C04B2235/3206C04B2235/3298C04B2235/3409C04B2235/36C04B2235/5427C04B2235/602C04B2235/656C04B2235/6562C04B2235/6565C04B2235/6567Y02E60/50
Inventor 肖明
Owner YANCHUANG PHOTOELECTRIC TECH GANZHOU
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