Low-temperature co-fired glass ceramic composite material with adjustable dielectric constant and preparation method thereof

Abstract

The invention discloses a low-temperature co-fired glass ceramic composite material with adjustable dielectric constant and a preparation method thereof. The composite material is prepared from the following raw materials in percentage by mass: 0.5 to 20 percent of BaxSrl-xTiO3(x=0.3-1) and 80 to 99.5 percent of fluorinated aluminosilicate glass; wherein, the fluorinated aluminosilicate glass is prepared from the following raw materials in percentage by mass: 30 to 70 percent of SiO2, 20 to 50 percent of AlF3, and 5 to 30 percent of CaF2. After being mixed by the ratio, the components are added with ethanol or water, ball milled for 24h and dried to obtain low-temperature co-fired glass ceramic powder. The low-temperature co-fired glass ceramic composite material has the advantages that: (1) the sintering temperature is low (750 to 850DEG C) and the sintering shrinkage rate is 8 to 15 percent; and (2) the dielectric constant is adjustable from 8 to 50 (1GHz), and the dielectric loss is below 0.002 and the mechanical strength is higher. Consequently, the invention is applicable to low-temperature co-fired ceramic materials and electronic packaging materials.

Description

technical field [0001] The invention belongs to the field of electronic ceramic materials, and in particular relates to a low-temperature co-fired glass-ceramic composite material with adjustable dielectric constant and a preparation method thereof. Background technique [0002] In recent years, driven by the rapid development of semiconductor technology, electronic components continue to develop in the direction of miniaturization, integration and high frequency, which put forward higher requirements for passive integration technology and main dielectric materials. Among many electronic materials, low temperature co-fired ceramic LTCC (Low Temperature Co-fired Ceramic) material is characterized by its low sintering temperature (not exceeding 900°C), high integration and good co-firing characteristics with metal electrodes such as Ag and Cu. It has become an important development direction of passive integrated dielectric materials. [0003] Low-temperature co-fired ceramic...

AI Technical Summary

Problems solved by technology

[0005] But unfortunately, common low-temperature co-fired ceramic systems, such as CaO-B 2 o 3 -SiO 2 system, BaO-TiO 2 -SiO 2 -B 2 o 3 system and (Mg, Ca)TiO 3 、BaO-Nd 2 o 3 -TiO 2 Such as glass-ceramic composite system, its dielectric constant is relatively single or even if the dielectric constant can be adjusted, its adjustable range is usually relatively narrow

Images