Aluminum nitride powder, sintered body and production thereof.

摘要

The present invention provides an aluminum nitride powder comprising (i) aluminum nitride as a main component and (ii) at least one metal element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co, Ni, Nd and Ho and/or one or more compounds thereof in the total amount of 0.1 to 3.0% by weight as metal based on the weight of AlN. Such an aluminum nitride powder is useful for the preparation of colored sintered bodies having a thermal conductivity of at least 130 W/m.K, and a flexural strength of at least 30 kg/mm<2> and a high density, substrates for circuit boards and packages for semiconductor devices. The sintered body further contains, as a sintering aid, at least one selected from Groups IIa and IIIa elements of the Periodic Table and compounds thereof in the total amounts of 0.01 to 5.0% by weight (as metal) based on the weight of AlN.