Glass bonding of manganese-zinc ferrite

A process for increasing the wear resistance of a magnetic recording/reproducing head, said head comprising a core of magnetic hot-pressed manganese-zinc ferrite material having opposing pole faces defining at least one gap, while also minimizing or eliminating reaction between the manganese-zinc ferrite pole faces and a glass bonding composition applied thereto, said process comprising first forming a layer of chromium on the pole faces by R.F. sputtering the chromium thereon, each chromium layer being of a thickness of at least 25% of the width of said gap, and thereafter glass bonding the resulting chromium layers together by applying a high lead glass bonding composition at least 3 microinches thick to the area of the gap and firing the glass bonding agent at a temperature of no greater than about 700.degree. C. to adhere the chromium layers together with the glass bonding agent.