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Method, sintering aid and materials for preparation of low-temperature cofired medium ceramic and application

A dielectric ceramic and low-temperature co-firing technology, applied in the field of dielectric ceramic materials, can solve the problems of low dielectric properties and low mechanical strength of substrates.

Active Publication Date: 2013-01-09
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although LTCC has many unique advantages, because LTCC materials usually contain more glass phase components, the sintered substrate is prone to problems of low mechanical strength and low dielectric properties.

Method used

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  • Method, sintering aid and materials for preparation of low-temperature cofired medium ceramic and application
  • Method, sintering aid and materials for preparation of low-temperature cofired medium ceramic and application
  • Method, sintering aid and materials for preparation of low-temperature cofired medium ceramic and application

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preparation example Construction

[0026] Such as figure 1 Shown, the preparation method of the low-temperature co-fired dielectric ceramic of one embodiment, comprises the following steps:

[0027] Step S110: Weighing alumina (Al 2 o 3 ), sintering aids and modifiers, adding deionized water and mixing to obtain a mixed material, after ball milling and drying, a low temperature co-fired dielectric ceramic material is obtained. Among them, the modifier is titanium dioxide (TiO 2 ), manganese dioxide (MnO 2 ), cobalt tetroxide (Co 3 o 4 ), Yttrium trioxide (Y 2 o 3 ), zirconium dioxide (ZrO 2 ) and bismuth trioxide (Bi 2 o 3 ) at least one of the

[0028] Among them, by mass percentage, the sintering aid includes 31%~45% of silicon dioxide (SiO 2 ), 1%~10% boron oxide (B 2 o 3 ), 5.1%~10% zinc oxide (ZnO), 18%~30% aluminum oxide (Al 2 o 3 ), 11%~24% of alkaline earth metal oxides and 5%~15% of the general formula R 2 o 3 of oxides. Wherein, R is at least one of lanthanum (La), cerium (Ce), pras...

Embodiment 1

[0038] The composition of the low temperature co-fired dielectric ceramic material in this embodiment is shown in Table 1 and Table 2.

[0039] The preparation of low temperature co-fired dielectric ceramics in this embodiment is as follows:

[0040] (1) Preparation of sintering aid: aluminum chloride (AlCl 3 ), magnesium chloride (MgCl 2 ), calcium chloride (CaCl 2 ), strontium chloride (SrCl 2 ), barium chloride (BaCl 2 ), lanthanum chloride (LaCl 3 ), neodymium chloride (NdCl 3 ), dysprosium chloride (DyCl 3 ) as a raw material, each raw material is prepared into an aqueous solution, and mixed according to the mass percentage of each component in the sintering aid, and then ammonium bicarbonate (NH 4 HCO 3 ), using the chemical co-precipitation method to generate the precursor precipitates of each component, after filtration and washing, the silica (SiO 2 ), zinc oxide (ZnO), boric acid (H 3 BO 3 ) as the raw material, according to the silicon dioxide (SiO 2 ), ...

Embodiment 2

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

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

[0047] (1) Preparation of sintering aid: aluminum chloride (AlCl 3 ), magnesium chloride (MgCl 2 ), calcium chloride (CaCl 2 ), strontium chloride (SrCl 2 ), barium chloride (BaCl 2 ), lanthanum chloride (LaCl 3 ), neodymium chloride (NdCl 3 ) as a raw material, each raw material is prepared into an aqueous solution respectively, and is mixed according to the mass percentage of each component in the sintering aid, and then potassium carbonate (K 2 CO 3 ), using the chemical co-precipitation method to generate the precursor precipitates of each component, after filtration and washing, the silica (SiO 2 ), zinc oxide (ZnO), boric acid (H 3 BO 3 ) as the raw material, according to the silicon dioxide (SiO 2 ), zinc oxide (ZnO), b...

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Abstract

A sintering aid for a low-temperature cofired medium ceramic material is composed of, by weight, 31%-45% of silicon dioxide, 1%-10% of boron oxide, 5.1%-10% of zinc oxide, 18%-30% of aluminum oxide, 11%-24% of alkaline earth metallic oxide and 5%-15% of oxide with the general formula of R2O3, wherein R refers to at least one of lanthanum, cerium, praseodymium, neodymium, samarium, europium and dysprosium, and the alkaline earth metallic oxide refers to one of magnesium oxide, calcium oxide, barium oxide and strontium oxide. Adding the sintering aid into the low-temperature cofired medium ceramic material enables the prepared low-temperature cofired medium ceramic to have excellent thermal mechanical performance and dielectric performance. In addition, the invention provides the low-temperature cofired medium ceramic material and application thereof and a method for preparing the low-temperature cofired medium 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 application, and a method for preparing low-temperature co-fired dielectric ceramics using the above-mentioned low-temperature co-fired dielectric ceramic material. Background technique [0002] Low Temperature Co-fired Ceramics (LTCC) technology is an integrated component technology. Its specific process is to make low-temperature sintered ceramic powder into green ceramic tape, which is used as a circuit substrate material. On the surface, the pre-designed circuit pattern is produced by drilling, micro-hole grouting, conductive paste printing and other processes, and multiple passive components (such as capacitors, resistors, inductors, etc.) are embedded in it, and then laminated together , sintered at a lower temperature (usually less than 900°C) to make a passive integrated component ...

Claims

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Application Information

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IPC IPC(8): C04B35/63C04B35/622C04B35/10
Inventor 张火光肖泽棉唐浩宋永生吴海斌莫方策叶向红张彩云
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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