PREPARATION OF SEMICONDUCTING CERAMICS (NTC THERMISTORS) BY CHEMICAL METHOD E. JABRY, G. BOISSIER, A. ROUSSET, R. CARNET et A. LAGRANGE J. Phys. Colloques, 47 C1 (1986) C1-843-C1-847 DOI: 10.1051/jphyscol:19861129