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JW-DX specific surface area analyzer
The specific surface area of JW-D series is one of the important indicators to characterize the surface physical properties of micro nano powder mater
Product details
JW-D series
Specific surface area is one of the important indicators to characterize the surface physical properties of micro nano powder materials, and the commonly used measurement method is nitrogen adsorption method. The dynamic nitrogen adsorption method for determining specific surface area is widely used for rapid detection of products on industrial production lines. The JW-DX dynamic adsorption specific surface measurement instrument from Jingwei Gaobo Company is accurate and efficient, making it very suitable for testing small specific surface samples such as ternary materials, graphite and other battery positive and negative electrode materials, pharmaceutical excipients, etc.
Product Overview
Product Features
***
***The DX type instrument does not use the conventional desorption process but uses the adsorption process for peak area calculation, completely avoiding the testing error caused by incomplete desorption of samples at room temperature. It is very suitable for the determination of small specific surface areas of ternary materials, graphite and other battery positive and negative electrode materials;(* * No. 2)
Adsorption peak
The peak shape is sharp, and the nitrogen concentration change caused by adsorption of each sample is not diluted at all. The sensitivity of sample testing is greatly improved, and the testing efficiency is greatly improved under the condition of ensuring sufficient adsorption. It only takes about 20 minutes to complete the comparative test of 4 samples at once
Automatic regulation of nitrogen partial pressure
BET testing uses high-precision mass flow controllers of 70ml/min and 30ml/min for fully automatic nitrogen partial pressure regulation, with high control accuracy and small errors, ensuring the stability and accuracy of gas flow through the sample surface;(* * No. 2517307)
Calibration gas
The calibration gas for BET test is nitrogen, and the calibration system is automatically controlled by full solenoid valve, which breaks the limitation of traditional six way valve control and is progressiveness;(* * No. 2508179)
Easy to operate, humanized design
Fully automatic control and operation of surface instruments;
Dynamically display the adsorption or desorption process of each sample on the testing interface, with real-time display of adsorption or desorption peaks, and real-time calculation of peak area and adsorption capacity for each sample; During comparative testing, the specific surface area results of each sample are displayed in real-time and the test data is automatically saved as a source file. It supports offline analysis without online connection and can be copied;
The dynamic vacuum heating and degassing machine is equipped with a micro vacuum pump and a heating furnace, with a furnace body temperature of ≤ 400 ° C ± 1 ° C. After heating and degassing the sample, it can be transferred to the main body of the surface area analyzer for testing
Strong upgradability
DX type instrument standard configuration comparison method surface testing function, can be upgraded to multi-point BET surface testing instrument;
Dynamic external 4-station vacuum heating degassing machine, an optional equipment, is recommended for users to choose, and can be added at any time in the future
Typical analysis examples
1. Small surface sample testing
-Graphite negative electrode material
Analysis Station
4, each sample undergoes independent adsorption process, achieving interference free and differential testing of multiple samples, fully ensuring the parallelism of test results at each analysis station, with a repeatability error of ≤± 1.0%
Vacuum heating degassing
Optional. The external 4-station vacuum degassing machine can perform degassing pretreatment on 4 samples simultaneously, and when used in conjunction with the surface area analyzer host, it can greatly improve testing efficiency** Degassing temperature 400 ℃;(* * No. 2516757)
Dewar flask
A 1L capacity vacuum glass lined Dewar flask has a much better insulation effect than a metal lined liquid nitrogen cup;(* * No. 2509179)
Anti splash technology for samples
Independently developed and designed with a built-in anti splash unit, which can effectively prevent powder samples from flowing into the internal pipeline of the instrument with the flowing gas, and can effectively prevent the instrument from being contaminated
Typical analysis examples
2. Multi point BET surface area testing;
performance parameter
| model | JW-DX | JW-DA |
|---|---|---|
| Testing principle | Low temperature nitrogen adsorption, flow chromatography method | |
| Method features | ***Technology. Using adsorption peaks, similar to the static capacity method, four samples were tested independently without interference, with sharp signal peaks The testing accuracy of 10m2/g small surface area samples has significantly improved |
Traditional detachment techniques. Using desorption peaks, the four samples are parallel and not independent, and the signal peaks are diluted, which is not suitable for precise testing of small surface area samples with a specific area of less than 10m2/g |
| Testing function | Comparison method with surface area test; Single point and multi-point BET specific surface area testing |
Comparison method with surface area test; Single point and multi-point BET specific surface area testing |
| Test gas | High purity nitrogen (99.999%)+high-purity helium (99.999%) | |
| Range of nitrogen partial pressure P/P0 | 0.05-0.35 (multi-point BET) | |
| Scope of testing | Specific surface area 0.01m2/G to no known upper limit, Not suitable for testing microporous materials |
Specific surface area 0.01m2/G to no known upper limit, Not suitable for testing microporous materials |
| Repetitive accuracy | Carbon black standard sample ≤± 1.0%; Highly consistent with the accuracy of static capacity method testing |
Carbon black standard sample ≤± 1.5%; |
| Analysis Station | 4 of them | |
| Testing efficiency | The comparative method takes about 5 minutes to test each sample; Multi point BET testing takes approximately 25 minutes for each sample |
The comparative method takes about 9 minutes to test each sample; Multi point BET testing takes about 30 minutes for each sample; |
| Host specifications | Length 610mm x width 460mm x height 680mm, weight approximately 48Kg; | |
| Environmental temperature requirements | Room temperature, it is recommended to equip with air conditioning | |
| Environmental humidity requirements | 10%-90% | |
| Power requirements | AC 220V ± 20V, 50/60HZ, * * power 300W, current 5A; | |
| Recommended application areas | Graphite, ternary materials, lithium iron phosphate, lithium manganese oxide, lithium cobalt oxide and other positive and negative electrode materials for batteries; Pharmaceutical excipients; Metal powder; Metal oxide powder; Rare earth luminescent materials; Nano calcium carbonate; wait |
Lithium iron phosphate cathode material; Titanium dioxide; Inorganic non-metallic materials such as nano calcium carbonate; wait |
| Degassing station | Standard configuration includes 3 stations at the same location, which can simultaneously perform vacuum heating and degassing of three samples; An external 4-station vacuum heating and degassing machine can also be optionally selected; |
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