精品国产午夜理论片不卡_99这里只有精品_黑人大战亚洲人精品一区_精品国产免费一区二区三区香蕉_99久久精品美女高潮喷水

Test principle: the static volumetric method， gas adsorption;

Measuring range: surface area ≥ 0.005M²/g， no upper limit; pore size 0.35-500nm; pore volume 0.0001 cm³/g， no upper limit.

Sorption gas: N₂ (high purity); Ar， Kr， CO₂， CH₄， etc. available

Analysis No: 2 samples tested alternately

Sample Type: powders， granules， fibers， flakes and other materials

Pressure Sensor: 1000torr (133kpa)， 10torr (1.33kpa); 1torr (0.133kpa) or 0.1torr (0.0133kpa); pressure accuracy ≤± 0.15%（P.S）

P0 tube: there is a separate P0 tube in every analysis port， two in all， controlled by a separate pressure sensor， completely separates from the analysis bit， real-time detecting the nitrogen saturation vapor pressure， and participating in the theoretical calculation; also the atmospheric input method to determinate the P0 accurately;

Cold trap tube: sample degassing system has a special cold trap device that can effectively remove the water， hazardous substances and other impurities， degassed from the special sample， and it can avoid the contamination of the vacuum system;

Degassing system: two samples can be analyzed simultaneously， also can be degassed in the original port; another with two separate sample degassing station， which is independent and separate from the sample analysis. Throughout the degassing system， there are two independent heating packages， two independent temperature control systems， which can be programmed by temperature control; you can choose another four external vacuum degassing pretreatment system;

Degassing temperature: room temperature -400℃， accuracy ± 1℃;

Test Efficiency: multi-point BET surface area--30 minutes per sample; Determination micro pore size distribution from adsorption and desorption isotherms_5-20h per sample.

Nitrogen Partial Pressure: P/Po 1×10^-8 _ 0.998， the minimum resolvable relative pressure 5 × 10^-7

Ultimate vacuum:≤ 10P^-6 Pa （7.5×10^-9 torr）

Measurement Accuracy: ≤±1.0%（surface area）; ≤0.01nm（the most frequency micro pore） ≤±0.04% (True density)；≤±1.5% (STSA)

Operation Mode: Automatic

測(cè)試原理：靜態(tài)容量法，低溫氮吸附（或其他吸附氣體）；

測(cè)試精度：≤± 1.0%（比表面）；≤0.02nm（*可幾孔徑）；

測(cè)試氣體：氮、氧、氫、氬、氪、二氧化碳、甲烷等；

測(cè)試范圍：0.0005(m2/g)--至無(wú)上限(比表面積)；2nm-500nm(介孔及大孔分析)；0.35nm-2nm(微

孔分析)；孔體積0.0001cm3/g-至無(wú)上限；

測(cè)試效率：比表面積平均每樣30min；介孔、大孔分析平均每樣4-6小時(shí)；微孔分析平均每樣

10-15小時(shí)；

分析站: 獨(dú)立微孔分析站，2個(gè)測(cè)試位可同時(shí)進(jìn)行同位脫氣預(yù)處理；

杜 瓦 瓶：每個(gè)分析位原配單獨(dú)的3L真空玻璃內(nèi)膽杜瓦瓶，共2個(gè)；

試原理：靜態(tài)容量法，低溫氮吸附（或其他吸附氣體）