ALUMINUM NITRIDE SINTERED BODY AND MANUFACTURING METHOD THEREOF

摘要

An aluminum nitride sintered body with high heat conductivity and high strength as well as a method of inexpensively manufacturing such an aluminum nitride sintered body at a low temperature are provided. The aluminum nitride sintered body is manufactured by adding a compound of at least one type of rare earth element (R) selected from La, Ce, Pr, Sm, an d Eu, Y compound, Ca compound, and A~ compound to an A~N powder and sintering the resulting mixture at a temperature of 1550.degree.C to 1750.degree.C. The content of oxygen forming A~2O3 existing in an aluminate with rare earth element (R), Y and Ca and oxygen forming independently existing A~2O3 is calculated as 0.01 to 5.0% by weight, heat conductivity is 166 to 200W/mK, and bending strength is at least 300MPa.