書誌事項
- タイトル別名
-
- Effective Emissivities of Knudsen Cells Heated by Radiation
- ホウシャ カネツサレテ イル ヌッセンセル ノ ジッコウ ホウシャリツ
この論文をさがす
抄録
The emissivities of graphite-, thoria- and tungsten-cells being heated by a tungsten cylindrical heater were measured as a function of the orifice diameter in the temperature range of 1000° to 1900°C in order to provide data which are useful at the time when a precise temperature of a Knudsen cell having arbitrary orifice area is determined.<br>In the Knudsen cell constructed by a graphite having a nearly diffuse-reflecting surface and a high emissivity, its effective emissivities were close to unity when the reduced orifice diameter (=the orifice diameter/the cell cross-sectional one), rR, was less than 0.2. With increasing in rR, its emissivities deviated negatively from the calculated values up to rR=0.4, and then in the region of 0.4<rR<1 it increased gradually with increasing in rR due to the back ground radiation from the heater (back ground noise). The results for the thoria-cell were nearly same as that of the graphite-cell except that there was affected considerably by the back ground noise. On the other hand, in the tungsten cell having a more specular surface, its emissivities remained less than unity even if the orifice size was controlled as small as possible.<br>It was concluded that, for a usual Knudsen cell (length=diameter) heated by an outer radiational heat source, only a cell with a diffuse-reflecting surface and a small orifice (rR≤0.1) can be regarded as a black body.
収録刊行物
-
- 窯業協會誌
-
窯業協會誌 87 (1003), 163-167, 1979
公益社団法人 日本セラミックス協会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390282680194310400
-
- NII論文ID
- 110002316268
-
- NII書誌ID
- AN00245650
-
- ISSN
- 18842127
- 00090255
-
- NDL書誌ID
- 2047386
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可