Method for preparing low-temperature cofired dielectric ceramic and material and sintering aid of low-temperature cofired dielectric ceramic

A dielectric ceramic and low-temperature co-firing technology, which is applied in the field of dielectric ceramic materials, can solve problems such as high requirements for production equipment and process control, good low-temperature sintered ceramic dielectric materials, and degradation of electrical properties of sintering aid materials, so as to promote crystal grains. Refinement, reduce dielectric loss value, improve insulation effect

Active Publication Date: 2013-01-16
GUANGDONG FENGHUA ADVANCED TECH HLDG
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AI Technical Summary

Problems solved by technology

[0005] At present, the methods commonly used to prepare low-temperature sintered ceramic dielectric materials at home and abroad are: 1. Add glass mixture to ceramic powder as a sintering aid. This method has a simple production process and is easy to control, but the sintering temperature must be lowered to 850°C It is necessary to add a large proportion of this kind of sintering aid, because too much sintering aid will easily cause the deterioration of the electrical properties of the material, and it is difficult to obtain a low-temperature sintered ceramic dielectric material with good performance; Glass powder with a solubilizing effect, adding this glass powder to the ceramic powder as a sintering aid can easily achieve the purpose of low-temperature sintering, and can also ensure good dielectric properties of the ceramic dielectric material, but this method consumes a lot of energy. And the production process is complicated, and the requirements for production equipment and process control are relatively high

Method used

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  • Method for preparing low-temperature cofired dielectric ceramic and material and sintering aid of low-temperature cofired dielectric ceramic
  • Method for preparing low-temperature cofired dielectric ceramic and material and sintering aid of low-temperature cofired dielectric ceramic
  • Method for preparing low-temperature cofired dielectric ceramic and material and sintering aid of low-temperature cofired dielectric ceramic

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preparation example Construction

[0029] Such as figure 1 Shown, the preparation method of the low-temperature co-fired dielectric ceramic of one embodiment, comprises the following steps:

[0030] Step S110: Prepare titanate. According to mass percentage, titanate includes 72%~90% Zn 1-x Mg x TiO 3 and 10%~28% Ba 2 Ti 9 o 11 , where 0.03≤X≤0.3.

[0031] Among them, the method for preparing titanate is solid phase synthesis. And the preparation of titanate comprises the following steps:

[0032] Submicron zinc oxide (ZnO), magnesium oxide (MgO), barium carbonate (BaCO 3 ) and titanium dioxide (TiO 2 ) as raw material, according to Zn in titanate 1-x Mg x TiO 3 and Ba 2 Ti 9 o 11 The mass percentages are respectively 72%~90% and 10%~28% for batching; then, mix according to the mass ratio of the total mass of raw materials and deionized water as 1:1.6~1.8, after mixing by ball milling, at a temperature of Calcining at 900°C to 1050°C for 1 hour to 4 hours to obtain titanate.

[0033] Step S120:...

Embodiment 1

[0045] The composition of the low temperature co-fired dielectric ceramic material in this embodiment is shown in Table 1, Table 2 and Table 3.

[0046] The preparation of low temperature co-fired dielectric ceramics in this embodiment is as follows:

[0047] (1) Preparation of titanate: submicron zinc oxide (ZnO), magnesium oxide (MgO), barium carbonate (BaCO 3 ) and titanium dioxide (TiO 2 ) as raw material, according to Zn in titanate 0.97 Mg 0.03 TiO 3 and Ba 2 Ti 9 o 11 Then, according to the mass ratio of the total mass of the raw materials and deionized water is 1:1.6, mixed by ball milling, dried, and calcined at a temperature of 1050 ° C for 4 hours to obtain titanate.

[0048] (2) Preparation of sintering aid: aluminum chloride (AlCl 3 ), cobalt chloride (CoCl 2 ), lanthanum chloride (LaCl 3 ), neodymium chloride (NdCl 3 ) raw materials, each raw material is formulated into an aqueous solution respectively, and mixed according to the mass percentage of eac...

Embodiment 2

[0053] The composition of the low temperature co-fired dielectric ceramic material in this embodiment is shown in Table 1, Table 2 and Table 3.

[0054] The preparation of low temperature co-fired dielectric ceramics in this embodiment is as follows:

[0055] (1) Preparation of titanate: submicron zinc oxide (ZnO), magnesium oxide (MgO), barium carbonate (BaCO 3 ) and titanium dioxide (TiO 2 ) as raw material, according to Zn in titanate 0.89 Mg 0.21 TiO 3 and Ba 2 Ti 9 o 11 Then, according to the mass ratio of the total mass of raw materials and deionized water of 1:1.8, mix them by ball milling, dry them, and calcinate them at a temperature of 900°C for 4 hours to obtain titanates.

[0056] (2) Preparation of sintering aid: aluminum chloride (AlCl 3 ), copper chloride (CuCl 2 ), lanthanum chloride (LaCl 3 ), dysprosium chloride (DyCl 3 ) as raw materials, each raw material is prepared into an aqueous solution respectively, and mixed according to the mass percentag...

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Abstract

The invention relates to a sintering aid for a low-temperature cofired dielectric ceramic material. The sintering aid comprises the following components in percentage by mass: 40 to 55 percent of silicon dioxide, 5 to 16 percent of boron oxide, 12 to 17 percent of zinc oxide, 5 to 15 percent of aluminum oxide, 3 to 10 percent of lithium oxide, 0 to 5 percent of copper oxide, 0 to 5 percent of cobaltosic oxide and 3 to 8 percent of oxides of which the general formula is R2O3, wherein R may be at least one of lanthanum, neodymium, samarium and dysprosium. By the sintering aid for the low-temperature cofired dielectric ceramic material, the low-temperature cofired dielectric ceramic material can be sintered at temperature of between 830 and 950 DEG C, and the dielectric performance of the low-temperature cofired dielectric ceramic is improved effectively. In addition, the invention also provides the low-temperature cofired dielectric ceramic material and a method for preparing the low-temperature cofired dielectric ceramic.

Description

technical field [0001] The invention relates to the field of dielectric ceramic materials, in particular to a low-temperature co-fired dielectric ceramic material and its sintering aid, and a preparation method for preparing low-temperature co-fired dielectric ceramics using the above-mentioned low-temperature co-fired dielectric ceramic material. Background technique [0002] In recent years, with the rapid development of the modern information industry, the miniaturization, light weight, integration and high frequency of electronic circuits have put forward requirements for small size, high frequency, high reliability and high integration of electronic components. In microelectronic integration and component integration technology, low-temperature co-fired ceramics have become the mainstream way of electronic component integration. [0003] Low-temperature cofired ceramic (LTCC for short) technology is to make low-temperature sintered ceramic powder into a green ceramic ta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/63C04B35/462C04B35/622
Inventor 张火光肖泽棉唐浩宋永生吴海斌莫方策张彩云叶向红
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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