| 摘要 |
PURPOSE:To achieve a wide-range X-ray diffraction measurement by eliminating an obstacle on an X-ray passage and preventing sagging of heater wires under a high-temperature heating of 2,000 deg.C or higher and at the same time preventing deterioration of heater wires even under oxidation and reduction atmosphere. CONSTITUTION:A heater wire 2 is wound around a furnace body 1 with an X-ray transmission window 11. Then, by coating the surface of the heater wire 2 which is positioned at the peripheral wall part of the furnace body 1 with a heat-resistant coating layer 3, the heater wire 2 is protected from external oxidation and reduction atmosphere. Also, the heater wire 2 which is positioned at the part of the X-ray transmission window 11 is protected against external oxidation and reduction atmosphere by covering a heat-resistant hard coating member 4 and at the same time it is supported by the hard coating member 4, thus preventing sagging of the heater wire 2 under high-temperature heating. |
