Sanyo Electric Co., Ltd.

Shuichi Yoshikawa

Masaaki Nemoto

Yorinobu Yoshisato

Isao Yoshida

Ryokan Yuasa

A precursor is made from a plurality of materials having different vapor pressures. The precursor and a source material are placed in a closed heat treatment furnace. The source material is materials which are the same as some of the materials contained in the precursor and having particular vapor pressures. The precursor and source material is thermally treated in the furnace while the source material is being supplied, so the particular materials in the precursor have their evaporation suppressed, thereby forming compounds. The compounds may be oxide superconductors, oxide dielectric, and so on.

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Tsukuba, Japan

Shuichi Yoshikawa