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A kind of low dielectric constant ltcc material and preparation method thereof

A technology with low dielectric constant and main material, applied in the field of low dielectric constant LTCC materials and their preparation, can solve the problems of lower sintering temperature, low Q×f value, and no microwave dielectric properties of LMS-based ceramics. , to achieve the effect of promoting ceramic sintering, low dielectric constant and good process stability

Active Publication Date: 2022-05-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] For Li 2 O-MgO-SiO 2 System microwave dielectric ceramic system, although most of the previous research focused on reducing the sintering temperature, some of the low-melting point glasses are suitable for Li 2 O-MgO-SiO 2 Microwave-based dielectric ceramics have a unique liquid-phase sintering effect, which can effectively reduce the sintering temperature; however, these studies have not demonstrated the microwave dielectric properties of LMS-based ceramics at high frequencies, that is, the Q×f value is not high, or the addition of oxides is not sufficient. Can effectively reduce its sintering temperature

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  • A kind of low dielectric constant ltcc material and preparation method thereof
  • A kind of low dielectric constant ltcc material and preparation method thereof
  • A kind of low dielectric constant ltcc material and preparation method thereof

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preparation example Construction

[0031] The present invention also provides a kind of preparation method of low dielectric constant LTCC material, comprises the following steps:

[0032] Step 1: Preparation of ceramic main material, Li 2 O-MgO-SiO 2 Ceramic materials with Li 2 CO 3 , MgO, SiO 2 As raw material, mole ratio Li 2 CO 3 :MgO:SiO 2 = 1:1:1 synthesized main crystal phase is Li 2 MgSiO 4 The main ceramic material; mix the mixed ingredients with deionized water, wet ball mill for 2 to 5 hours, dry and then sieve, grind evenly, pre-fire at 850-930°C for 4 hours to synthesize the main crystal phase as Li 2 MgSiO 4 Phase Li 2 O-MgO-SiO 2 Ceramic base material;

[0033] Step 2: Preparation of glass additive, La 2 o 3 , B 2 o 3 , ZnO by mass percentage: 45%≤La 2 o 3 ≤47%, 28%≤B 2 o 3 ≤32%, 21%≤ZnO≤25% ingredients, mix the prepared materials with deionized water, wet ball mill for 2-5 hours, dry and then sieve, pre-burn at 600-800°C for 4 hours, and then Melt the glass slag at a tempera...

Embodiment 1

[0041] A kind of low dielectric constant LTCC material, be 100% Li by mass percentage 2 MgSiO 4 Composition, Li 2 MgSiO 4 The molar ratio of each component in Li is 2 O:MgO:SiO 2 =1:1:1, the sintering condition is 1250°C / 2h.

[0042] The above-mentioned low dielectric constant LTCC material is obtained by the following preparation method:

[0043] Preparation of Li 2 MgSiO 4 , Li 2 O-MgO-SiO 2 Ceramic materials with Li 2 CO 3 , MgO, SiO 2 As raw material, mole ratio Li 2 CO 3 :MgO:SiO 2 = 1:1:1 synthesized main crystal phase is Li 2 MgSiO 4 The ceramic main material (chemical equation is Li 2 CO 3 +MgO+SiO 2 = Li 2 MgSiO 4 ); Mix the mixed ingredients with deionized water, wet ball mill for 2 to 5 hours, dry and then sieve, grind evenly, pre-fire at 850-930°C for 4 hours to synthesize the main crystal phase as Li 2 MgSiO 4 Phase Li 2 O-MgO-SiO 2 Ceramic base.

Embodiment 2

[0045] A low dielectric constant LTCC material, according to mass percentage, its composition includes: 0.5% lanthanum boron zinc glass, 99.5% Li 2 MgSiO 4 ceramic powder;

[0046] The specific components of the lanthanum boron zinc glass are: 45.00% La 2 o 3 , 30.00% B 2 o 3 , 25.00% ZnO; the Li 2 MgSiO 4 The molar ratio of each component in the ceramic powder Li 2 O:MgO:SiO 2 =1:1:1.

[0047] The preparation method of embodiment 2 comprises the following steps:

[0048] Step 1: According to the composition ratio requirements of the lanthanum-boron-zinc glass (45.00% La 2 o 3 , 30.00% B 2 o 3 , 25.00% ZnO), the La 2 o 3 , B 2 o 3 , ZnO powder for uniform mixing ((chemical equation is Li 2 CO 3 +MgO+SiO2 = Li 2 MgSiO 4 )); mill the uniformly mixed powder for 4 hours, then dry and sieve, pre-fire at 700°C for 4 hours, melt at 1200°C for 1 hour, and cool with the furnace to obtain glass slag, which is crushed to obtain Lanthanum boron zinc glass powder;

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Abstract

The invention discloses a Li 2 O-MgO-SiO 2 It is an LTCC material and a preparation method thereof, relating to the technical field of electronic materials, and its original ingredient composition is 98.0-100.0wt% Li 2 O-MgO-SiO 2 Ceramic material and 0.0-2.0 wt% lanthanum boron zinc glass. The composition of the LMS ceramic material is: Li 2 CO 3 , MgO, SiO 2 , Moore than Li 2 CO 3 :MgO:SiO 2 = 1:1:1 synthesized main crystal phase is Li 2 MgSiO 4 The ceramic main material; the raw material composition of lanthanum boron zinc glass is: 45wt%≤La 2 o 3 ≤47wt%, 28wt%≤B 2 o 3 ≤32wt%, 21wt%≤ZnO≤25wt%. The above components are sintered at 850°C to 925°C in air to obtain the LTCC material of the present invention after weighing, primary ball milling, pre-calcination, sieving, secondary ball milling, granulation, molding and other processes. The low-temperature sintered LTCC material provided by the invention has low raw material prices, extremely low device production costs, and has a lower dielectric constant, a higher quality factor and good process stability after testing.

Description

technical field [0001] The invention belongs to the technical field of electronic materials and devices, and in particular relates to a low dielectric constant LTCC material and a preparation method thereof. Background technique [0002] In recent years, the wave of informatization has swept the world, mobile communication and wireless local area network (WLAN) and other modern communication technologies have developed rapidly, and microwave technology has also developed towards higher frequencies. The rapid development of the fifth-generation mobile communication has made mobile communication equipment and portable terminals tend to be small, light, high-frequency, low power consumption, multi-functional, and high-performance. This poses a new challenge for microwave circuit components based on microwave dielectric ceramics With higher requirements, various new microwave dielectric components have emerged, and related microwave dielectric ceramic materials are developing to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/20C04B35/64C04B35/622
CPCC04B35/20C04B35/64C04B35/622C04B2235/36C04B2235/442C04B2235/96
Inventor 孙成礼王铭剑黄学敏张树人
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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