Decomposition Of Ruthenium Oxides In Lead Borosilicate Glass

Behaviours of apparent phase changes of Ru-containing oxides in lead borosilicate glass at high temperatures have been investigated using X-ray diffraction and transmission electron microscopy in application to thick-film resistors. During firing of thick films containing Ru oxide powder and lead borosilicate glass frits, apparent phase changes of Ru oxides have been found to occur both ways between ruthenium dioxide and lead ruthenate pyrochlore via decomposition of one phase in glass and subesequent formation of the other.