Abstract
Wurtzitic aluminum nitride-based ceramic materials having the following high characteristics: structural ceramics with a Vickers hardness of HV = 16.8 GPa, fracture toughness K Ic = 4.7−4.9 MPa·m1/2, bending strength σ = 370–430 MPa; functional ceramics for heatsinks with a thermal conductivity of 140 W/(m·K) and for microwaves absorption with dielectric constant ɛ = 23, dielectric loss tangent tan δ = 0.025, coefficient of the electromagnetic energy attenuation L to 36.3 dB/cm (at a frequency of 3 GHz) have been obtained using pressureless sintering and hot pressing.
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