Patent ID: 7247260

Claim:
Method for preparing a semi-conductive ceramic material, characterised in that: in a receptacle containing a liquid, there are mixed from 30 to 90% by weight of a conductive phase based on Z 1-x M x CrO 3 for 0≦×≦0.3, with Z being able to be an element of the lanthanide group or a mixture of elements of this type, and M being able to be calcium, strontium, magnesium, aluminium, titanium, yttrium or a mixture of two or more of these elements; from 8 to 60% by weight of an insulating phase based on fine grains of alumina or tabular alumina or mullite or a mixture of two or more of these compounds; and from 0 to 10% by weight of sintering additives; operations are carried out for milling, drying and sieving this mixture; this mixture is pressed; and this mixture is sintered in order to obtain a ceramic material having a porosity less than or equal to 25%.