High-temperature calibration of a multi-anvil high pressure apparatus

摘要: Fusion and solidification of Al Ag samples, as well Fe93–Al3–C4, Fe56–Co37–Al3–C4, Fe57.5–Co38–Al1–Pb0.5–C3 alloys (in wt%), have been investigated at 6.3 GPa. Heater power jumps due to heat consumption release on metal fusion solidification, respectively, were used calibrate the thermal electromotive force thermocouple against melting points (mp) for Al. Thus, obtained corrections are +100°C (for sample periphery) +65°C (center) within 1070–1320°C range. For small samples positioned randomly in low-gradient zone a high pressure cell, should be +80°C +84°C temperatures 1070°C 1320°C, respectively. The temperature contrast recorded cell gives an error about ±17°C. method has applied identify mp systems, which is especially important temperature-gradient growth large type IIa synthetic diamonds.