Manufacturing method of sintered body for electrolyte and electrolyte for fuel cell using the same

A method for manufacturing a sintered body for an electrolyte, which comprises:

• (i) mixing a solution containing preliminarily formed crude particles dispersed therein with a nanoparticle precursor solution for preparing nanoparticles;
• (ii) a combustion step wherein nanoparticles are prepared on the surface of the crude particles from the resultant mixture;
• and
• (iii) a calcination step wherein impurities are removed from the combustion product,
• wherein the crude particle is at least one selected from cerium oxides including at least one selected from the group consisting of gadolinium (Gd), samarium (Sm) and lanthanum (La), and zirconium oxides including at least one selected from the group consisting of yttrium (Y), scandium (Sc) and calcium (Ca);
• and
• the nanoparticles are prepared in the form of nanoparticles attached to the surface of the crude particles through a combustion process using at least one selected from cerium nitrate, gadolinium nitrate, samarium nitrate, lanthanum nitrate, zirconium nitrate, yttrium nitrate, scandium nitrate and calcium nitrate as a precursor.