Joule Heating Devices
Joule heating devices use the phenomenon of joule effect of conductive material itself to apply an electrical environment to it, so that the material can reach a very high temperature (1000~3000℃) in a very short time (0~10s). In this way, the change of physical properties of materials in extreme and severe thermal shock can also be investigated.
This product can provide electrical environment for conductive and non-conductive materials and measure their temperature. Temperature measurement range is 400~3200℃. At present, this product is widely used in battery, catalysis, ceramics, metal materials and other fields.Through rapid temperature rise and fall, it can be used to prepare nanoscale particles, monatomic catalysts, high entropy alloys, etc. The device can customize the electrical environment and vacuum system. Accessories include: control cabinet, vacuum chamber, electrode, vacuum pump, high temperature sample table, temperature measuring probe, and adapter cable.
| Joule heating device selection table | |||
| Version | Standard model | Updated model | Selected model plus |
| Model | JH3.1 | JH3.2 | JH3.3-P |
| Power supply | Single-phase 220V/20A | Single-phase 220V/40A | Three-phase 380V/30A |
| Output voltage | 0~30V | 0~40V | |
| Output current | 0~200A | 0~375A | 0~500A |
| Current ramp time | 1000ms | 1ms | |
| Minimum pulse width | / | / | 1ms |
| Count pulse | / | / | 0-999-continuous |
| Data acquisition cycle | 100ms | 5ms | |
| Data communication model | RS485 | RS485+USB | |
| Data collection model | Touch screen | Touch screen+PC(optional) | |
| Data control model | Touch screen | Touch screen+software | |
| Data collection content | Real-time temperature | Real-time temperature Real-time voltage Real-time current | |
| Clamping electrode | Stationary type | Adjustable distance type | |
| Highest temperature | 3000℃ | ||
| Long-terminsulation | No | Yes | |
| Temperature measurement method | Monochromatic temperature measurement, wavelength 1.08um | ||
| Measuring range | 250~2000℃/550~3000℃/700~3000℃ | ||
| Probe cooling mode | No | Air-cooling | |
| Vacuum chamber | 316Lmaterial, barrel, Φ50mm view window, quartz window, volume 12L | SS304 stainless steel, square, Φ16mm observation window, sapphire window, volume 400ml | |
| Single-working hours | <10min | Long-term basis | |
| Air circuit device | 2-way intake, 1-way vacuum, 1-way exhaust | ||
| Vacuum pump | Standard configuration OPR-DV2 | ||
| Sample table material | Ink boat, graphite paper, carbon paper, graphite tube(plus), etc | ||
| Size of metal sample(customizable) | ≤100*8*0.2mm | ≤100*15*0.2mm | ≤100*15*0.2mm |
| Sample test volume | 100MG(Specific gravity1) | 300MG(Specific gravity1) | 500MG(Specific gravity1) |
| Overall dimensions | 750*450*450mm | 500*500*1100mm | 540*650*1000mm |
The reaction chamber and corresponding pipeline valves can be upgraded with corrosion-resistant materials (Hastelloy) according to the experimental needs.
Accessories introduction:
Optris Probe JHex-001
Germany oppus probe (Optris CTratio 2M model):
●Higher accuracy (the ambient temperature is in the range of 23±5℃, the system accuracy is ±0.5% and the measured temperature is +2℃); Repeatability: ±0.3%, measurement temperature is +2℃;
●A viewing window that is largely resistant to dust, steam and dirt. Accurate measurement can be carried out when window pollution is up to 90%;
●Fast response time and data acquisition cycle as low as 1ms;
●Three temperature zones(275~1000°C, 400~1500°C, 550~3000°C) can be set.
JH series accessories:
●Model: JHex-001;
●Purpose: to provide small vacuum environment with heating function; It is used for sample migration and experiment in clean environment such as glove box.
Application cases---Analysis of the results of flash preparation of graphene from biocarbon.
The following figure is a comparison of the Raman diagram of graphite and graphene, which can be seen to determine whether it is graphene, the key is to look at the 2D peak.
No D peak means less impurities. The number of graphene layers can be seen from 2D/G, less than 1 is multi-layer, equal to 1 is double-layer, and more than 1 is single-layer.
The results of our experiments are as follows:
From the Raman results, it can be seen that the graphene prepared at 2400 and 2600 degrees has less impurities. With the temperature rising, the D peak becomes obvious, indicating that the impurities become more.
