| abstract |
PROBLEM TO BE SOLVED: To be obtained by firing at a low temperature of 1000 ° C. or less, capable of co-sintering with Ag or Cu, having a high Q value, excellent mechanical strength, and suitable for high frequency applications. Obtain insulator porcelain. SOLUTION: This is an insulator porcelain obtained by mixing and firing a MgO-MgAl 2 O 4 ceramic and a borosilicate glass, and as main crystal phases, an MgAl 2 O 4 crystal phase and a Mg 3 B 2 O An insulator porcelain in which 6 crystal phases and at least one of Mg 2 B 2 O 5 crystal phases are precipitated. |