A novel type of composite LTCC material for high flexural strength application

A novel high flexural strength Low-temperature co-fired ceramic (LTCC) material, xAl(2)O(3)+ (1-x) BaO-Al2O3SiO2-B2O3-ZnO-CaO-MgO (x = 35-50 wt. %) glass-ceramics, was synthesized by conventional solid-state reaction method. The activation energy, phase assemblage, thermal properties, mechanical properties, chemical compatibility with Cu and microwave dielectric properties of the prepared samples were discussed. The composites (x = 35-50 wt. %) could be densely sintered at 950 degrees C/2 h. With the content of Al2O3 increasing, the coefficient of thermal expansion (CTE) increases from 6.7 x 10(-6)/K to 7.2 x 10(-6)/K, and the flexural-strength first increases from 280 to 360 MPa, and then decreases from 360 to 240 MPa. The xAl(2)O(3)+ (1-x) BaO-Al2O3SiO2-B2O3-ZnO-CaO MgO(x = 35-50 wt. %) glass-ceramics sintered at 950 degrees C for 2 h has the excellent dielectric properties and mechanical properties at x = 45 wt. %: epsilon(r) = 7.6, tan delta = 3.01 x 10(-4) at1 MHz, tau(f) = -35.25 ppm/degrees C, CTE = 6.79 x 10(-6)/degrees C, flexural strength = 360 MPa.

Automated summary

The novel high flexural strength LTCC material, consisting of xAl(2)O(3)+ (1-x) BaO-Al2O3SiO2-B2O3-ZnO-CaO-MgO (x = 35-50 wt. %) glass-ceramics, was synthesized and discussed for its excellent thermal, mechanical, and microwave dielectric properties. The composites could be densely sintered at 950 degrees C/2 h, showing promising potential for various applications.