Application Case | In-Situ Temperature-Dependent Melting Point Calibration of CsCl and Au Using the Ultra-High Temperatu

• GoGo Instruments Ultra-High Temperature Heating Stage H1400-XY
  (equipped with XY sample translation mechanism, supporting rapid quenching/heating via sample movement)

• CCD Microscopy Imaging System

• All-new Temperature Control & Vision Integration Software: GoGoVIEW                   

To validate the temperature control accuracy and thermal stability of the H1400-XY ultra-high temperature heating stage by performing in-situ optical observation of the melting behavior of certified reference materials (CsCl and Au). The results provide a reliable temperature calibration basis for subsequent extreme-temperature experiments, such as fluid inclusion analysis and high-temperature phase transition studies.

Two reference materials with well‑defined melting points were chosen:

• CsCl (Cesium Chloride): theoretical melting point ≈ 645 °C

• Au (Gold): theoretical melting point ≈ 1064 °C

These two samples cover the mid‑ to ultra‑high temperature range, making them ideal for calibrating the stage’s performance between 600 °C and 1100 °C.

Temperature ramping was programmed using the GoGoVIEW software:

1.CsCl:Rapid heating to 550 °C,When approaching the melting point, the heating rate was reduced to 5 °C/min until complete melting.

2.Au:Rapid heating to 900 °C,When approaching the melting point, the heating rate was reduced to 5 °C/min until complete melting

The CCD imaging system recorded morphological changes in real time, allowing determination of the onset melting temperature and complete melting temperature from the image sequence.

Onset melting temperature of CsCl: ≈ 634 °C
Complete melting temperature of CsCl: ≈ 648 °C

The deviation from the theoretical melting point (645 °C) is within ±3 °C, demonstrating excellent temperature control precision of the heating stage above 600 °C.

Onset melting temperature of Au: ≈ 1061 °C
Complete melting temperature of Au: ≈ 1065 °C

The deviation from the theoretical melting point (1064 °C) is less than 3 °C, confirming the thermal stability and repeatability of the stage above 1000 °C.

The measured melting temperatures of CsCl and Au are in excellent agreement with theoretical values, with deviations well within acceptable limits. This confirms that the H1400-XY ultra-high temperature heating stage offers outstanding temperature accuracy and long-term thermal stability from room temperature up to 1400 °C.

• XY precision translation (±5 mm) : Allows the sample to be moved rapidly between the heating zone and a low‑temperature platform, enabling in‑situ quenching/heating experiments – ideal for studying phase transformation kinetics and fluid/melt inclusion behavior.

• Ultra‑high temperature capability (RT to 1400 °C) : Suitable for demanding applications involving metals, ceramics, and geological samples.

• Optical compatibility : Can be directly coupled with optical microscopes, Raman spectrometers, and SEM for in‑situ temperature‑dependent micro‑spectroscopic analysis.

• Materials Science: In‑situ observation of high‑temperature phase transitions, sintering, and grain growth

• Geology: Fluid/melt inclusion analysis, mineral melting point determination

• Thermal Analysis: Thermal stability assessment, phase diagram determination, quenching/rapid‑cooling experiments

The melting point data of reference materials can be compared with certified values (e.g., from NIST) to further enhance the scientific credibility of the results.

Keywords: Ultra-High Temperature Heating Stage; H1400-XY; In-Situ Temperature-Dependent Testing; Melting Point Calibration; CsCl; Au; GoGoVIEW