Moly-D heating elements are manufactured in several grades of elements, 1700, 1800 and 1900 super MoSi2 heating elements. If Moly-D elements are used at low temperature in air, an oxidation can occur at around 600 C.
Moly-D heating elements are manufactured in several grades of elements, 1700, 1800 and 1900 super MoSi2 heating elements. If Moly-D elements are used at low temperature in air, an oxidation can occur at around 600 C that produces a yellowish powder on the element surface. This so-called pest oxidation has no detrimental effect on the performance of the Moly-D heating elements, but is a potential source for product contamination, so operation in this temperature range should be avoided.
In recent years, new MoSi2 heating elements have been introduced to meet the rapidly evolving needs of furnace temperature cycles and atmospheres. These Moly-D elements feature qualities that are optimized for specific applications such as high temperatures in reactive atmospheres (e.g., nitrogen), extreme temperatures with changing atmospheres, high temperatures and rapid cycling in laboratory and high-temperature sintering furnaces and contamination sensitive high temperature processes. This represents a significant advancement in MoSi2 element technology.
Advantages of Moly-D heating elements:
Available in a variety of shapes and sizes
Highest operating temperatures and watt loadings of the elements under consideration
Stable resistance; new and old elements can be connected in series.
Fast, thermal cycling possible without element degradation
Relatively easy to change while the furnace is hot
Longest inherent life of all electric heating elements
Disadvantages of MoSi2 heating elements,
More costly power control equipment than for metallic elements (low voltage/high startup current, transformer required)
Most expensive of the elements under consideration
Ceramic material risk of fracture
The Moly-D heating elements is a dense cermet material consisting of MoSi2 and an oxide, glassy phase component.
Moly-D elements have the ability to withstand oxidation at high temperatures by forming a protective layer of quartz on its surface. If this glassy phase should be exposed to contaminants, a lower melting phase forms. This material literally drips off the element exposing more molybdenum disilicide on which a new protective oxide layer forms. MoSi2 heating elements become somewhat ductile at approximately 1200ºC
Moly-D heating elements are manufactured in several grades of elements, 1700, 1800 and 1900 super MoSi2 heating elements. If Moly-D elements are used at low temperature in air, an oxidation can occur at around 600 C that produces a yellowish powder on the element surface. This so-called pest oxidation has no detrimental effect on the performance of the Moly-D heating elements, but is a potential source for product contamination, so operation in this temperature range should be avoided.
In recent years, new MoSi2 heating elements have been introduced to meet the rapidly evolving needs of furnace temperature cycles and atmospheres. These Moly-D elements feature qualities that are optimized for specific applications such as high temperatures in reactive atmospheres (e.g., nitrogen), extreme temperatures with changing atmospheres, high temperatures and rapid cycling in laboratory and high-temperature sintering furnaces and contamination sensitive high temperature processes. This represents a significant advancement in MoSi2 element technology.
Advantages of Moly-D heating elements:
Available in a variety of shapes and sizes
Highest operating temperatures and watt loadings of the elements under consideration
Stable resistance; new and old elements can be connected in series.
Fast, thermal cycling possible without element degradation
Relatively easy to change while the furnace is hot
Longest inherent life of all electric heating elements
Disadvantages of MoSi2 heating elements,
More costly power control equipment than for metallic elements (low voltage/high startup current, transformer required)
Most expensive of the elements under consideration
Ceramic material risk of fracture
The Moly-D heating elements is a dense cermet material consisting of MoSi2 and an oxide, glassy phase component.
Moly-D elements have the ability to withstand oxidation at high temperatures by forming a protective layer of quartz on its surface. If this glassy phase should be exposed to contaminants, a lower melting phase forms. This material literally drips off the element exposing more molybdenum disilicide on which a new protective oxide layer forms. MoSi2 heating elements become somewhat ductile at approximately 1200ºC
