Drying properties of Sugi round timber with microwave heating

Jinji Piao, Noboru Fujimoto, Kanehiro Oohashi, Mitsuru Tanikawa, Masashi Kitada, Hozumi Sonobe, Yo Ueda

研究成果: ジャーナルへの寄稿記事

2 引用 (Scopus)


Sugi round timbers injected with preservative are useful for outdoor playing and construction materials. To dry the Sugi round timbers for preservative injection, three drying methods including microwave drying, kiln drying and air drying were compared in this study. Using microwave drying, the timbers were dried within one day, but the other two drying methods required a much longer time. During most of the microwave drying process, the wood temperature appeared to be higher in the inner layer than in the outer layer. As a result, the inner layer moisture contents were significantly reduced by microwave drying, while kiln drying produced almost no decline in the inner layer moisture contents. In addition, although significant surface checks often occurred in timbers dried by kiln drying and air drying, microwave drying caused few surface checks. In contrast, internal checks were only observed in timbers treated by microwave drying. These results suggested that the microwave drying technique can improve the effectiveness of preservative injection in Sugi round timbers.

ジャーナルJournal of the Faculty of Agriculture, Kyushu University
出版物ステータス出版済み - 10 1 2006


All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science


Piao, J., Fujimoto, N., Oohashi, K., Tanikawa, M., Kitada, M., Sonobe, H., & Ueda, Y. (2006). Drying properties of Sugi round timber with microwave heating. Journal of the Faculty of Agriculture, Kyushu University, 51(2), 345-349.