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In situ Raman high-temperature reaction chamber is mainly used to observe the Raman spectrum changes of samples under high temperature conditions, so as to explore the influence of high temperature on the phase structure of samples. The device mainly includes a pool body (high temperature furnace body), heating system, water cooling system, temperature control system, sample table and other parts. The ambient heating method can adjust the temperature of the reaction tank in real time to ensure that the sample is at a constant temperature point, the maximum operating temperature is 1200℃, and the temperature control accuracy is ±0.1°C.