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Low-temperature co-fired microwave dielectric ceramic material and preparation method thereof

A technology of microwave dielectric ceramics and low-temperature co-firing, which is applied in the field of electronic ceramic materials, can solve the problems of high energy consumption, high equipment requirements, and high sintering temperature, and achieve the effect of adjustable temperature coefficient of resonance frequency

Inactive Publication Date: 2016-05-11
东莞成电创新电子科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] BaO-Ln 2 o 3 -TiO 2 Ceramic-like ceramics have high dielectric constant and Qf value, and microwave dielectric properties with different characteristics can be obtained by adjusting the formula in a wide range. However, due to its high sintering temperature (>1200 ° C), its Application in LTCC field
In order to achieve matching co-firing with the conductive paste, low-melting-point glass is mostly used to lower the sintering temperature of ceramics, but this "ceramic + glass" system still has great shortcomings: ①The production cost is high, due to the need for high-temperature melting Glass production requires long heat treatment time, high energy consumption, and high-temperature volatilization may easily cause formula changes; ②The requirements for equipment are high, and after the glass is melted, quenching will cause a large loss of equipment; ③The glass slag after quenching has high hardness and is difficult to grind
④The existence of the glass phase greatly increases the loss of materials

Method used

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  • Low-temperature co-fired microwave dielectric ceramic material and preparation method thereof
  • Low-temperature co-fired microwave dielectric ceramic material and preparation method thereof

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Embodiment 1～4

[0017] According to the general chemical formula Ba 4 (Nd 1.0-X Bi x ) 9.33 (Ti 0.9 Zr 0.1 ) 18 o 54 Weigh BaCO 3 、Nd 2 o 3 、 Bi 2 o 3 , ZrO 2 、TiO 2 Raw materials, where x is taken according to the value in Table 1, using absolute ethanol as the medium, planetary ball milling for 3 hours, drying after taking out, and pre-burning in the atmosphere at 1100°C for 2 hours to make the BNBTZ base material; the raw materials BaO, CuO and B 2 o 3 The molar ratio is 1:1:1, with absolute ethanol as the medium, the planetary ball is milled for 3 hours, taken out, dried, and pre-fired in the atmosphere at 700°C for 3 hours to make a powder b pre-fired block for later use; in BNBTZ Add powder b accounting for 5wt% of the total mass percentage to the base material, use absolute ethanol as the medium, planetary ball mill for 12 hours, take it out and dry it, add PVA solution to granulate, press and shape, and then sinter at a temperature of 930°C for 4 Hours, using a network...

Embodiment 5～9

[0021] According to the general chemical formula Ba 4 (Nd 0.8 Bi 0.2 ) 9.33 (Ti 0.9 Zr 0.1 ) 18 o 54 Weigh BaCO 3 、Nd 2 o 3 、 Bi 2 o 3 , ZrO 2 、TiO 2 Raw materials, using absolute ethanol as the medium, planetary ball milling for 3 hours, drying after taking out, and pre-burning in the atmosphere at 1100°C for 2 hours to make BNBTZ base material; the raw material Nd 2 o 3 with Al 2 o 3 According to the molar ratio of 1:1 ingredients, with anhydrous ethanol as the medium, the planetary ball mill for 3 hours, take it out and dry it, and pre-fire it in the atmosphere at 1200 ° C for 3 hours to make a powder a pre-fired block for later use; the raw materials BaO, CuO with B 2 o 3 The molar ratio is 1:1:1, with absolute ethanol as the medium, the planetary ball is milled for 3 hours, taken out, dried, and pre-fired in the atmosphere at 700°C for 3 hours to make a powder b pre-fired block for later use; in BNBTZ Add powder a and powder b in different percentages o...

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Abstract

The present invention discloses a low-temperature co-fired microwave dielectric ceramic material very suitable for LTCC process production and a preparation method thereof. The low-temperature co-fired microwave dielectric ceramic material comprises 87-97wt% of Ba4 (Nd1.0-XBix) 9.33 (Ti0.9Zr0.1) 18O54, 0-6wt% of powder a and 3-7wt% of powder b, the powder a is a pre-calcined body, comprises Nd2O3 and Al2O3 in the molar ratio of 1:1, and has a chemical general formula of NdAlO3; and the powder b is a pre-calcined body, comprises BaO, CuO and B2O3 in the molar ratio of 1:1: 1, and has a chemical general formula of BaCu (B2O5). The low-temperature co-fired microwave dielectric ceramic material is free of glass melting and low in manufacturing cost, the sintering temperature is lower than 950 DEG C, the low-temperature co-fired microwave dielectric ceramic material can be matched with silver for co-firing, relative dielectric constant is 55-70, Qf value is 3000-5000GHz, and the resonance frequency temperature coefficient is adjustable.

Description

technical field [0001] The invention relates to the field of electronic ceramic materials, in particular to a low-temperature co-fired microwave dielectric ceramic material and a preparation method thereof. Background technique [0002] With the rapid development of mobile communication, mobile communication terminals are developing in the direction of miniaturization, light weight, and integration. The requirements for reducing the size of microwave circuit components based on microwave dielectric ceramics are put forward. To achieve this requirement, there are the following There are two ways: one is to find microwave dielectric materials with high dielectric constant; the other is to use LTCC low-temperature co-firing technology. [0003] Low Temperature Co-fired Ceramic technology (LowTemperatureCo-firedCeramic, LTCC) is a new multidisciplinary integrated component technology that has emerged in recent years. One of the key technologies of modularization of electronic d...

Claims

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Application Information

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IPC IPC(8): C04B35/49C04B35/626C04B35/634
CPCC04B35/49C04B35/62645C04B35/63416C04B2235/3215C04B2235/3217C04B2235/3251C04B2235/3281C04B2235/3298C04B2235/3409C04B2235/48
Inventor 陈鲁国康建宏李广新
Owner 东莞成电创新电子科技有限公司
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