Ceramic Properties
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Products | Ceramic Properties
Designed to Endure
Ceresist ceramic lined fittings are designed to outlast linings such as glass, rubber,
basalt, hardfacings, coatings, trowelable linings, cure-in-place linings, and plastics
that are commonly used to extend the life of piping systems. These materials are
only a fraction of the hardness and wear resistance of our ceramics, and with the
introduction of a corrosive into the process or high temperatures, most linings
become severely incompatible and their use is extremely limited. Ceresist fittings
feature ceramics that approach diamond in hardness, are chemically inert to almost
all corrosives, and may be installed in services where temperatures exceed 1,100°F.
High-Purity Alumina
Alumina ceramic is by far the most commonly used ceramic, and is commercially
available in many different purities — from a porous 76% refractory material to a
high-purity, inert 99.9%. However, important properties such as hardness and
corrosion resistance are drastically reduced when installing low-purity alumina in
harsh environments.
Ceresist fittings are available with high-purity 99.5% and 99.8% alumina ceramic.
These grades are 42% harder than chrome carbide hardfacing, three times harder
than glass, and nine times harder than carbon or stainless steel. Alumina also
exhibits an extremely high level of corrosion resistance — even at high temperatures
— and is the ideal material for high wear applications where corrosive and abrasive
fluids are present. It is a very cost-effective material, and deliveries are quite rapid.
Nitride-Bonded Silicon Carbide (NB SiC)
The nitride bonded silicon carbide ceramic consists of sintered silicon carbide
particles fired in a silicon nitride ceramic matrix. It is nine times harder than carbon
or stainless steel, exhibits superior chemical resistance to acids and alkalies, and
furthermore possesses excellent high temperature and thermal shock resistance.
NB SiC is cast into custom shapes, and may be fabricated in lengths up to 60” and
diameters up to 46” — allowing for extremely cost-effective long runs of piping
whilst minimizing the number of individual segments. It is slightly porous, which
limits its use in cavitating environments, but is an excellent material for basic wear
applications.
Sintered Silicon Carbide
Whether submerged in corrosive environments, subjected to extreme wear and
abrasive conditions, or exposed to temperatures in excess of 1,400°C (2,552°F),
sintered silicon carbide will outperform other commercially available ceramics or
metal alloys, including high-alumina, RB SiC, and superalloys.
Sintered silicon carbide is one of the hardest high-performance materials available,
second only to diamond. Additionally, it weighs less than half as much as most
metal alloys, 40 percent as much as steel and about the same as aluminum. The
high density, low porosity and chemical inertness of sintered silicon carbide permit
it to function in environments of hot gases and liquids, in oxidizing and corrosive
atmospheres, and in strong acids and bases, even at extremely high temperatures.
The high thermal conductivity of sintered silicon carbide, combined with its low
thermal expansion, produces excellent thermal-shock resistance far better than
tungsten carbide, aluminum oxide and reaction-bonded silicon nitride.
These properties make sintered silicon carbide the most wear– and corrosion–
resistant ceramic we offer for use in the most agressive services.
Housing Materials
In addition to our standard carbon steel housing, stainless steel 316 or 304, FRP, and
vinyl ester wrapping, other custom housing materials may be supplied. For added
protection, a corrosion and abrasion–resistant epoxy coating is applied to carbon
steel housings to offer durability from harsh environments as well.
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