Intermediary electric constant low temperature cofiring ceramic material and preparation method

Abstract

The invention discloses an intermediary electric constant low temperature cofiring ceramic material and a preparation method, wherein the ceramic material comprises 50-70 parts by weight of a Ba-Ti compound, 0-5 parts by weight of powder A, 30-45 parts by weight of powder B, 2-15 parts by weight of powder C and 0-2 parts by weight of powder D; wherein the Ba-Ti compound comprises BaCO3 and TiO2, the powder A is BaZn2Ti4O11, the power B comprises Ba(OH)2, H3BO3, ZnO and La2O3, the ingredient(s) of the powder C is / are one or a plurality of SrTiO3, TiO2 and CaTiO3, and the powder D is one or a plurality of MnO2, Co2O3 and Cr2O3. By the technical scheme of the invention, the intermediary electric constant low temperature cofiring ceramic material obtains a relatively excellent ceramic microwave characteristic, is simple in preparation process and suitable for large-scale production, has good compatibility with a microwave matrix material, and lowers the sintering temperature of materials effectively.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a low-temperature co-fired ceramic material with a medium dielectric constant and a preparation method thereof. Background technique [0002] Low temperature co-fired ceramic (Low Temperature Co-fired ceramic, LTCC) technology, as an electronic component integration technology, adopts a multi-layer wiring structure, which can realize passive components (resistors, capacitors, inductors, filters, resonances) on a three-dimensional structure. Couplers) and transmission lines can also be surface-mounted IC components, so that the device can achieve high integration and functional compounding on the basis of maintaining excellent high-frequency characteristics, and can meet the requirements of future electronic equipment development. LTCC microwave passive components have low dielectric loss, high operating frequency (up to 40GHz), small size, and high stability in harsh en...

AI Technical Summary

Problems solved by technology

However, chemical synthesis methods and the use of ultra-fine powders can lead to complex processes, and a sharp increase in manufacturing cycle and cost

In comparison, adding low-melting glass, compounds or oxides that match the material matrix will lead to a decrease in the microwave performance of the matrix material, but the process is simple and easy to achieve industrial production

However, the composition and process of low-melting point glass are relatively complicated, and the production cost is high. Professional equipment is required for high-temperature melting of glass, which takes a long time for heat treatment and consumes a lot of energy.

Moreover, the cold quenching process of glass has a large loss of equipment, the glass slag after quenching has high hardness, it is difficult to grind, the shape of the glass is poor, and the process adaptability is not good

Low melting point oxides, such as V2O5 and B2O3, although they can effectively reduce the Sintering temperature, but it is very easy to react with organic additives such as PVA and PVB in the process of gelation, which affects the production of ceramic cast film belts

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