| abstract |
In the production method of the present invention, a mixture containing Al source powder, Mg source powder, Ti source powder and Si source powder, and a pore-forming agent is obtained to obtain a molded article, and the obtained molded article is prebaked and then fired by firing. As a method for producing magnesium, the pore former content is 5 parts by mass to 30 parts by mass with respect to a total of 100 parts by mass of the Al source powder, the Mg source powder, the Ti source powder, and the Si source powder, and the Si source powder has a melting point of 600 Is from 1 ° C to 1300 ° C, and the elemental composition ratios of Al, Mg, Ti and Si in the mixture are represented by the composition formula (1): Al 2 (1-x) Mg x Ti (1 + x) O 5 + aAl 2 O 3 + bSiO 2 ... (1) When x is 0.05≤x≤0.15, a satisfies 0≤a≤0.1, b satisfies 0.05≤b≤0.15, respectively, and the molded body after prefiring is fired at 1300 ° C to 1560 ° C. It is done. |