Gold APP Instruments Corporation China is a professional researcher and manufacturer of laboratory and analytical instruments located in Beijing, China. They specialize in instruments for measuring surface area, pore size, and density of particle, porous, powder, and fiber materials. These instruments include BET surface area analyzers, surface area and pore size analyzers, gas pycnometers for true density analysis, and high pressure/temperature gas adsorption analyzers. Gold APP also provides sample preparation degassing equipment.

1. GOLD APP
INSTRUMENTS CHINA
1
Address: Floor 6th
, Tianli Building, No.56th
, Zhichun Rd., Haidian Dist., Beijing 100098, CHINA
Tel:(8610)-82132122, Mobile:(86)-18210009838, Fax:(8610)-82118197, Skype: Gold-APP-Instruments
http://www.jinaipu.com
Email: sales@jinaipu.com
Lead You to Particles World Better
NanomaterialPore Types
With reference to Figure 1, we can classify pores according to how accessible they are to an external fluid. In this context,
one category (closed pores) consists of pores that are inaccessible to an external fluid and totally isolated from their
neighbors, as in region (a). Closed pores influence macroscopic properties such as bulk density, elasticity, mechanical
strength, and thermal conductivity, but they are inactive in processes such as fluid flow and adsorption of gases. On the
other hand, pores that have a navigable channel of communication with the external surface of the body (like b, c, d, e, and f)
are described as open pores. Open pores are further classified into "through pores" and "blind pores." Through pores have
an open channel that begins at one location on the surface, extends into the particle, and re-emerges on the surface at a
different location (like the pore channels c-e-c and c-e-d). Blind pores (also called dead-end or saccate pores) are open to the
surface only at one end (like b and f). A special distinction is made for blind pores like those in region of g of Figure 1.
While these small surface irregularities are technically blind pores, it is often more useful and convenient to consider them
separately as part of a distinct attribute, called surface roughness. A simple convention often used is to assume that surfac e
irregularities are counted as pores only if they are deeper than they are wide. Pores may be classified further according to
their shape. Common shape terms include cylindrical (open c or blind f), ink-bottle (b), funnel(d), and slit shapes.
Figure 1. Schematic cross section of a porous solid
Gold APP Instruments Corporation China is a professional researcher and manufacturer for laboratory and analytical
instruments, such as BET surface area analyzer, surface area and pore size analyzer, gas pycnometer true density analyzer,
high pressure and high temperature gas adsorption analyzer, sample preparation degasser and so on for particle, porous,
powder and fiber materials by measuring methods BET surface area method, Langmuir surface area, t-plot, BJH pore size,
pore volume, pore size distribution, MP micropore, SF, HK, DR, DA micropore and mesopore analyzing. Welcome to find

2. GOLD APP
INSTRUMENTS CHINA
2
Address: Floor 6th
, Tianli Building, No.56th
, Zhichun Rd., Haidian Dist., Beijing 100098, CHINA
Tel:(8610)-82132122, Mobile:(86)-18210009838, Fax:(8610)-82118197, Skype: Gold-APP-Instruments
http://www.jinaipu.com
Email: sales@jinaipu.com
Lead You to Particles World Better
more from our web www.jinaipu.com or email to sales@jinaipu.com.