Abstract: Ceramic moldings composed of aluminum oxide which have a proportion of intercrystalline fracture of more than 50%, an average pore radius of more than 4 .mu.m and a porosity of more than 2%, are obtained by:a) grinding aluminum oxide which is at least 99.5% pure and has an average primary crystal size of 1 to 4 .mu.m to an average fragment size of 2 to 7 .mu.m,b) adding a source of magnesium oxide, silicon oxide and calcium oxide in amounts such that the magnesium oxide content is 0.2 to 2.5%, the silicon dioxide content is 1 to 6% and the calcium oxide content is 0.1 to 2.5%, in each case with respect to the amount of Al.sub.2 O.sub.3,c) shaping a green compact andd) sintering.

Abstract: An SMD-resistor includes a ceramic substrate having two main faces, two side faces and two end faces which are intergranular fracture faces, two contact layers provided on two ends of a main face adjoining the end faces, a resistive layer situated on this main face and electrically contacting both contact layers are two end contacts, covering both end faces and electrically contacting the contact layers.