Rare earth specific surface area test - Database & Sql Blog Articles

According to the electronic layer structure and physicochemical properties of rare earth elements, and their symbiosis in minerals and different ionic radii, different characteristics can be produced. Seventeen rare earth elements are usually divided into two groups:

Light rare earths include: lanthanum, cerium, lanthanum, cerium, lanthanum, cerium, lanthanum, cerium.

Heavy rare earths include: 铽, 镝, 钬, 铒, 铥, 镱, 镥, 钪.
The specific surface area of ​​rare earths is a very important parameter. The specific surface area is the surface area per gram of solid material in m2/g; the national standard for specific surface area testing is the BET multi-point method based on BET theory (GB/T 19587-2004). The main point of the specific surface area measured by the nitrogen adsorption BET multi-point method is: in the range of 5-30% nitrogen partial pressure, the adsorption amount of the adsorbent (the powder to be tested) to nitrogen is measured at different partial pressure points of nitrogen, and adsorption is made. The isotherm, the specific surface area of ​​the adsorbent can be calculated by the BET formula to determine the saturated adsorption amount of the monolayer when the surface of the adsorbent is covered with nitrogen molecules to cover the monolayer. The 3H-2000 series specific surface analyzer is a high-precision analytical instrument based on national specific surface test standards. It has 7 domestic leading technologies; such as the only integrated in-situ purge processing function in China, for chromatographic specific surface testing. The problem of purging treatment between different nitrogen partial pressure points is required, which makes the purging treatment between different nitrogen partial pressure points more convenient and efficient, and reduces the influence of continuous testing on accuracy; the only program-controlled wind-heat assisting device in China, After achieving full automation, it is guaranteed to obtain sharp and rapid desorption peaks and reduce background error; the only chromatographic concentration detection system in China makes the nitrogen partial pressure detection accuracy increase by 10 times relative to the flow method; the six-way valve injector program control, The only quantitative tube program-controlled switching function in China; the only granularity report function in China; the instrument parameter software is displayed at the same time, the large-screen LCD hardware display on the instrument makes the instrument working state parameters clear at a glance, the operation is more reliable; and the liquid nitrogen temperature monitoring, Detector gas shutoff protection, detector thermostat, important part sound prompts, make 3H-2000 series specific surface area
Application areas:
Battery material: graphite, lithium iron phosphate, lithium cobaltate, lithium manganate, lithium nickel cobaltate, cobalt oxide, lithium titanate, ternary materials, battery materials, lithium manganese materials, magnesium manganese materials, carbon materials, nickel hydrogen materials , nickel-cadmium material, separator; electrolytic manganese dioxide, graphite powder, nickel hydroxide, nickel foam, modified graphite material, positive electrode material, negative electrode material;
Ceramic raw materials: alumina, zirconia, silicate, aluminum nitride, silicon dioxide, cerium oxide, silicon nitride, quartz, silicon carbide;
Metal oxides: alumina, zinc oxide, calcium oxide, sodium oxide, magnesium oxide, cerium oxide, iron oxide, copper oxide, titanium oxide, titanium dioxide, titanium, zirconium oxide, cerium oxide, metal oxide;
Environmental protection industry: pigments, inorganic pigments, calcium carbonate, silica, mineral powder, sediments, suspended solids;
Metal materials: silver powder, iron powder, copper powder, tungsten powder, nickel powder, aluminum powder, cobalt powder;