石英ガラスによるスクイザー型高圧装置圧力室内の圧力分布の測定

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書誌事項

タイトル別名
  • Measurement of Pressure Distribution in Simple Squeezer Using Quartz Glass Powder
  • セキエイ ガラス ニ ヨル スクイザーカタ コウアツ ソウチ アツリョク シツナイ ノ アツリョク ブンプ ノ ソクテイ

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説明

The distribution of pressure in a specimen chamber of a simple squeezer was estimated by using the change in refractive index of quartz glass with pressure as a pressure calibrant. The relation between the refractive index of the glass and pressure can be represented by the following epuation<br>Np=1.461+ap+bp2, <br>where Np is the refractive index of quartz glass at 22°C after the compression under pressure p kb, a and b are numerical constants and are 4.0×10-4 and 4.8×10-6, respectively. The distribution of the refractive index in the specimen chamber was measured at room temperature not only in the radial direction but also in the axial direction.<br>The radial distribution of pressure estimated from the refractive index distribution agreed well with that obtained by using the BiI-II transition point. The pressure in the central part of specimen chamber was 1.5 times greater than the pressure in the peripheral part when a stainless steel ring of diameter to thickness ratio of 22.4:1 was used.<br>In order to estimate the pressure distribution at higher temperatures, quartz glass powder was treated with water at 500°C, under pressure of 21kb and 20kb measured at the central part of the specimen.<br>Under 21kb, all glass powder changed to coesite in the central part of the specimen chamber and quartz was found along with coesite in the peripheral part, while under 20kb glass powder in the central part changed mostly to quartz and partially to coesite, and only quartz was observed in the peripheral part.<br>The temperature distribution was measured by thermocouple placed in the central and the peripheral part of the specimen and adjacent to the outside of the ring. Only a small difference in temperature was observed in the specimen chamber.

収録刊行物

  • 窯業協會誌

    窯業協會誌 75 (859), 77-84, 1967

    公益社団法人 日本セラミックス協会

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