In the fields of lithium battery research and development, semiconductor packaging, or material synthesis, temperature fluctuations inside glove boxes may directly affect material performance and even the success or failure of experiments. What factors affect the temperature changes inside the glove box? How to accurately measure the temperature inside the glove box? How to precisely control the temperature inside the glove box?
1. Environmental temperature conduction
The thermal conductivity of the glove box body material can cause external temperature infiltration, thereby affecting the temperature inside the box (the thermal conductivity coefficient of 304 stainless steel is about 16.3W/(m · K)). In summer or winter, if the indoor temperature fluctuates too much, it will indirectly affect the temperature inside the glove box.
2. Equipment self heating
The circulating fan, vacuum pump, and integrated heating module (such as a vapor deposition machine) of the glove box will generate heat during operation, indirectly affecting the temperature changes inside the box.
3. Human operation interference
Every time the transition warehouse is opened for item transfer, it can also cause instantaneous temperature differences, and frequent operations may cause temperature changes inside the box. If it is an experiment that requires frequent transfer of items, an automatic sample transfer system can be used to reduce manual intervention.
4. Light radiation
High intensity lighting or direct sunlight in laboratories or production workshops can also cause the glove box to heat up and affect the temperature inside the box.
1. Infrared thermometer
Infrared thermometer is a non-contact temperature measuring tool that can estimate the temperature inside the glove box by measuring the infrared radiation on the surface of the glove box (such as a transparent observation window). However, it should be noted that the accuracy of infrared thermometers may be affected by various factors, such as the material, color, thickness, and ambient temperature of the glove box surface.
2. Built in temperature sensor
Professional temperature sensors such as thermistors or thermocouples can accurately measure the temperature inside the glove box. Sensors are typically used in conjunction with data loggers or data acquisition systems to monitor and record temperature data in real-time.
1. Causing a decrease in material properties
Inaccurate temperature inside the glove box may lead to uneven crystal quality of perovskite films, resulting in defects and a decrease in the photoelectric conversion efficiency of perovskite cells; In lithium metal battery experiments, if the temperature inside the box is too high, it may accelerate the growth of lithium dendrites, while if the temperature is too low, it will increase the interface impedance, ultimately leading to a shortened battery cycle life and even causing short circuits or thermal runaway.
2. Chemical reaction out of control
In some chemical reaction experiments, temperature changes can also have a significant impact. For example, in asymmetric catalytic reaction experiments, if the temperature is too high, it may accelerate side reactions and lead to a decrease in product selectivity; If the temperature transition occurs, it may lead to a slow reaction rate, prolonged reaction time, and catalyst deactivation. Temperature fluctuations can lead to unstable reaction selectivity, and the results of each experiment are not comparable.
1. Turn on the air conditioning
Turn on air conditioning in the laboratory or production workshop to maintain a balanced room temperature and reduce the impact of external temperature on internal temperature.
2. Integrated temperature control module
Integrate air conditioning or other temperature control systems into the glove box, work with temperature sensors, and combine with the temperature control system to automatically adjust the temperature inside the box. In low temperature environments, the temperature inside the glove box can be increased by a heater. In high temperature environments, the cooler can lower the temperature inside the glove box.
3. External circulating bath
Circulating heat transfer fluid (water/silicone oil) through the interlayer of the box or the built-in coil, controlled by an external bath.
4. Gas pre cooling/preheating system
The glove box used in the high-temperature process field can also add a heat exchanger in the glove box gas purification path to perform temperature pretreatment on the input gas.
5. Intelligent management platform
By integrating temperature sensors, air conditioning, and circulation systems through the Internet of Things, remote control can be achieved. When the temperature changes beyond the preset value and the temperature control system does not automatically adjust, the mobile phone will receive a reminder to check and adjust in a timely manner, avoiding experimental failures caused by temperature changes.
