@article{oai:ohu-lib.repo.nii.ac.jp:00002230,
 author = {石田, 喜紀 and 岡田, 英俊 and 野口, 博志 and 星野, 匠 and 及川, 均 and 長山, 克也 and イシダ, ヨシノリ and オカダ, ヘデトシ and ノグチ, ヒロシ and ホシノ, タクミ and オイカワ, ヒトシ and ナガヤマ, カツヤ and ISHIDA, Yoshinori and OKADA, Hedetoshi and NOGUCHI, Hiroshi and HOSHINO, Takumi and OIKAWA, Hitoshi and NAGAYAMA, Katsuya},
 issue = {1},
 journal = {奥羽大学歯学誌},
 month = {Mar},
 note = {P(論文), The purpose of this study was to examine the thermal expansive force of the gypsumbonded investment for quick heating and the influence of the thermal expansive force on the mold compressive strength. Four types of quick heating type investments and one conventional investment were used in the experiments. The thermal expansive force was measured by TMA. The quick types were heated 30 minutes after mixing started from the room temperature up to 700℃ at a programming rate of 20℃/min., while the conventional type was heated 120 minutes after mixing started from the room temperature up to 700℃ at a programming rate of 6℃/min. The mold compressive strength was measured when the mold was heated 30 minutes after mixing started for 30 minutes in a muffle of the furnace heated at 700℃, and 120 minutes after mixing started from the room temperature up to 700℃ at a programming rate of 6℃/min. The following results were obtained. 1. The maximum thermal expansive force of the quick type was smaller than that of the conventional type. 2. The thermal expansive force of the quick type appeared at temperatures near 200-300℃ and 500-600℃, and the magnitude of expansivity differed according to the blending quantity of the refractory material. 3. The mold compressive strength was greatly affected by the blending quantity of the binding material and the blending quantity of cristobalite. 4. The magnitude and the effect speed of the thermal expansive force were relative to the mold compressive strength.},
 pages = {1--6},
 title = {歯科用埋没材の熱膨張力 : その2 迅速鋳造型石膏系埋没材},
 volume = {31},
 year = {2004}
}