SIC RODS

U Shape, Material Grade 1800,D1=3mm, D2=6mm, Le=140mm,Lu=125mm, A=25mm

Specify as: Songshan Super MS18, U Shape, 3/6×140×125×25

Songshan Super MoSi2 heating elements are resistive heating elements based on molybdenum disilicide. The molybdenum disilicide heating elements prevents the inner core from oxidation by forming a compact quartz glass coating at the surface under high temperature. The temperature generated by MoSi2 goes as high as 1700-1830C in an oxidation atmosphere. They can be widely used in such applications as sintering and heat treatment on electronic ceramics, structural ceramics, magnetic materials, flameproof materials, glass, metallurgy, etc. The resistance of the heating elements is independent in their mission time. The MoSi2 heating elements hardly age, which allows the mixed use of new and old packages. After a long time use in lower temperature around 400-700C, the element will get powdered due to intensified oxidation at this temperature range.

The product includes series 1700 grade, 1800 grade. The packaging is available in U shape, W shape, Straight shape (X shape), bend shape (L shape), Round shape, Spiral shape, M shape. The dimension ranges from 3/6,4/9, 5/10, 6/10, 6/12, 6/14, 7/14, 8/16, 9/18 to 12/24mm.

Silicon Carbide Heater

Silicon Carbide Heating Elements

The silcarb Silicon carbide heating element is a time trusted heating element. silcarb SiC is characterized by high use temperature, superior oxidation resistance, low corrosion, long service life, low creep, and easy installation features i.e. full accessories. Typical material properties (nominal) are specific gravity: 3.0 - 3.1g/cm3, specific heat: 0.7 * 0.1.4KJ/Kg, emissivity: ~0.80, tensile strength: ~15 * 106 N/m2 and the expansion coefficient is 4.8 * 10-6. The Silcarb silicon carbide heating elements are available in eight different basic configurations that extend heater life, especially in corrosive environments.  For more information, please complete and submit the application form below or contact us at (+91-80-23347004 / 23462904.)or email us with this general inquiry form.

*Note: All SEO Silicon Carbide Heaters are conditioned with the SEO patented and patent applied NoAgeTM treatment, which provides greater stability during use. Why choose silcarb Silicon Carbide?

*Read silcarb Silicon Carbide HeatingElement Testimonials
New Dross Reduction Cascade e-Ion Technology for Aluminum and Silver Alloys.  New Elements.

High Temperature Furnaces

High-TemperatureBogie Hearth Furnaces with SiC Rod Heating up to 1550 °C

 Bogie hearth furnaces equipped with SiC rod heating can be used in the production of technical ceramics, especially for sintering at working temperatures up to 1550 °C. The WHTC product line with especially robust design can hold heavy charges including kiln furniture. The furnace chamber is equipped with high-quality insulation made of high-temperature fiber blocks. The bogie insulation is structured in multi-layer lightweight refractory bricks on the heating chamber side.

The furnace is heated along both sides by vertically installed SiC heating rods. This heating technology permits processes requiring working temperatures above 1350 °C which cannot be achieved with wire heating elements. The SiC rods are controlled by the thyristor controller which counteract the aging of the heating elements by means of automatic power compensation.

• Tmax 1550  °C
• Dual shell housing with rear ventilation provides for low shell temperatures
• Swing door hinged on the right side
• Heating from both sides via vertically mounted SiC rods
• Thyristor controllers with automatic output compensation counteract the aging of SiC rods
• Multi-layer insulation with high-quality fiber modules on the heating chamber side
• Bogie for heavy loads lined with lightweight refractory bricks
• Bogie hand driven on rubber tires
• Motor-driven exhaust air flap on the furnace roof
• Over-temperature limiter with adjustable cutout temperature for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load
• Defined application within the constraints of the operating instructions
• NTLog Basic for Nabertherm Controller: Recording of process data with USB-flash drive

Additional equipment

• Safety concepts
• Exhaust air and exhaust gas piping
• Thermal or catalytic exhaust cleaning systems
• Process control and documentation via VCD software package or Nabertherm Control Center (NCC) for monitoring, documentation, and control
•  By Silcarb

Heat Treatment Furnaces

Continuous Heat Treatment: Strand Line Furnaces

Carbolite Gero can supply units to process a single strand. However, for cost-efficient production furnaces with up to eight lanes are offered as standard and additional lanes can be added (up to a maximum of 22).

The furnace length is determined by the throughput requirement. The strand passes through Inconel or ceramic tubes and, where required, under the appropriate atmosphere and water cooling (for controlled hardening). A burn-off flame on each tube ensures complete combustion of exhaust gases. Long life wire heating elements are wound around ceramic tubes and are located in both furnace halves. Individually controlled zones provide excellent temperature uniformity which is especially important when heating long lengths.

Depending on tube length and customer requirement, Carbolite Gero can supply a variety of tube supports and tube tensioning systems which ensure the work tubes remain straight. A hinged furnace top allows ease of servicing and cleaning. Low thermal mass insulation ensures fast heat up rates and excellent thermal efficiency. Carbolite Gero offers controls for inert and reactive gases such as cracked ammonia and hydrogen.

 

Tower Melting Furnaces

Entec Industrial Furnaces Pvt. Ltd counted as one of the celebrated Tower Furnace manufacturers, suppliers, and exporters of India. These types of furnaces are suitable for pressure to casting plants, additionally, these are, melting cum holding furnace with elevator charging aluminum ingots and product returns.

We utilize only premium quality raw material and another component which are a must for fabricating these types of furnaces. Because of their robust structure, modern design, long life, low maintenance, high efficiency and productivity, their demand rise in the national as well as international market.

Being leading Tower Melting Furnaces manufacturers, suppliers, and exporters of India, we offer our complete range at a competitive market price. We provide doorstep delivery of your consignment without any delay. We commit that you will never feel guilty over your decision to choose us for your industry needs. Feel free to send inquiries; we are right here to help you.

These industrial Tower Furnace are suitable for pressure die casting plants. hey, getting cum holding furnace with elevator charging aluminum ingots and product returns.

Features Of Tower Furnace

• High productivity
• Long operating life
• Trouble free performance
• Durability
• Eco-friendliness

 Suitable for pressure die casting plants

Laboratory / Melting Furnaces

 

Melting Furnaces up to 1500 °C

 

Laboratory /Melting Furnaces

These compact melting furnaces for the melting of non-ferrous metals and alloys are one of a kind and have a number of technical advantages. Designed as tabletop models, they can be used for many laboratory applications. The practical counterbalanced hinge with shock absorbers and the spout (not for KC) on the front of the furnace make exact dosing easy when pouring the melt. The melting furnaces are available for furnace chamber temperatures of 1000, 1300, or 1500 °C. This corresponds to melt temperatures of about 80 °C - 110 °C lower.

• Tmax 1000 °C, 1300 °C, or 1500 °C, with melt temperature about 80 °C - 110 °C lower
• Crucible sizes of 0,75, 1,5 or 3 liters
• Crucible with integrated pouring spout of iso-graphite included with delivery
• Additional spout (not for KC), mounted at the furnace for exact pouring
• Compact bench-top design, simple emptying of the crucible by the tiltiing system with gas damper
• Crucible for heating up of melting furnace insulated with a hinged lid, the lid opened when pouring
• Defined application within the constraints of the operating instructions

Additional equipment

• Other crucible types available, e.g. steel
• Design as a bale-out furnace without tilting device, e.g. for lead melting
• Over-temperature limiter for the furnace chamber with automatic reset to protect against overtemperature. The limit controller switches off the heating when the pre-set limit temperature has been reached and does not switch it on again until the temperature falls below the setting again.
• Observation hole for melt
• Silcarb company.

Model	Tmax	Crucible	Volume	Outer dimensions4 in mm			Connected	Electrical	Weight
	°C		in l	W	D	H	load kW	connection*	in kg
K 1/10	1000	A 6	0.75	520	680	660	3.0	1-phase	85
K 2/10	1000	A10	1.50	520	680	660	3.0	1-phase	90
K 4/10	1000	A25	3.00	570	755	705	3.6	1-phase	110
K 1/132	1300	A 6	0.75	520	680	660	3.0	1-phase	120
K 2/132	1300	A10	1.50	520	680	660	3.0	1-phase	125
K 4/132	1300	A25	3.00	570	755	705	5.5	3-phase1	170
KC 1/153	1500	A6	0.75	580	630	580	10.5	3-phase	170
KC 2/153	1500	A10	1.50	580	630	580	10.5	3-phase	170

Molybdenum Disilicide

Molybdenum Disilicide

Download PDF Copy

Request QuoteWritten by AZoMMay 282001

Molybdenum disilicide (MoSi₂) is a refractory metal silicide that is primarily used as a heating element. In recent years, its potential for use as a structural ceramic has been recognized, as the material combines excellent oxidation resistance and high elastic modulus at elevated temperatures. 

These applications have been limited as MoSi₂ is inherently brittle below 1000 ^oC, and has poor creep resistance at temperatures above 1200 ^oC. Consequently, workers have concentrated on improving these properties by combining MoSi₂ with the second material in a composite. 

MoSi₂ and associated composites are most commonly made by pressure-assisted sintering techniques.  Hot pressing and hot extrusion produce simple shapes and are relatively economical. 

Hot isostatic pressing produces complex shapes, with uniform density and grain structures, but is a more costly process.  

Many other techniques such as reaction sintering, mechanical alloying and self-propagating high-temperature synthesis are being investigated, but have yet to demonstrated reproducibility and commercial viability.

Key Properties

Molybdenum disilicide has gained attention due to its attractive properties:

•         Moderate density

•         High melting point

•         Excellent oxidation resistance

•         High modulus at elevated temperatures.

Its use as a structural ceramic is limited by poor characteristics in two key areas:

•         Low toughness at temperatures less than 1000 of means that the material is very brittle at room temperature, and only becomes plastic at elevated temperature.

•         Poor creep resistance at temperatures above 1200 ^oC. 

Typical properties of hot-pressed molybdenum disilicide is shown in table 1. 

Table 1. Typical Physical and Mechanical Properties of Molybdenum Disilicide.

Property	Value
Density (g.cm-3)	6.29
Melting Point (°C)	2230
Young’s Modulus (GPa)	430
Bend Strength (MPa)	250
Fracture Toughness K1C (MPa.m0.5)	3
Hardness (GPa)	9
Resistivity (ohm.cm) (at room temp)	3.5 x10-7
Resistivity (ohm.cm) (at 1700 °C)	4.0 x10-6

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Applications

Molybdenum disilicide is most commonly used commercially in electric heating elements.  The material has the potential to be used in high-temperature structural components.

Heating Elements

Molybdenum disilicide is a conductive silicide which resists oxidation through the formation of stable layers of silica on its surfaces at high temperatures.

MoSi₂ has been developed as an electric heating element for use in the air at temperatures above 1600 ^oC (figure 1). Much commercial MoSi₂ heating elements known are in fact cermets, comprising a mixture of MoSi₂ particles bonded together with an aluminosilicate glass phase, typically as 20% of the total volume.

Figure 1. A Split tube furnace (max. operating temperature 1800 °C) equipped with MoSi2heating elements (Photo Courtesy of Radatherm Pty Ltd)

The best grade of MoSi₂ elements are capable of operating up to 1800 ^oC but the material is extremely brittle and can suffer badly from creep in use.  However, they offer process advantages as they can operate at high electrical loads without aging and do not show increasing electrical resistivity with use.  They are resistant to oxidation in air, oxygen, and oxygen-rich atmospheres.  They can also be used with nitrogen, noble gases, hydrogen, ammonia and limited vacuum, however operating temperatures and campaign life may be reduced due to a breakdown of the protective oxide layer.

MoSi₂ elements are supplied as ready-made elements, and are produced as either straight or bent forms and in a wide range of dimensions. The elements are used mainly in laboratory furnaces and production furnaces in the glass, electronics, steel, ceramics and heat treatment industries.

High Temperature Structural Components

The attractive combination of oxidation resistance and high-temperature elasticity makes molybdenum disilicide a most promising candidate for use in high-temperature applications such as gas turbine engines.   Many investigators have worked to improve low-temperature ductility and high-temperature creep resistance.  However, they have yet to produce a commercially viable composite combining all the desired properties.

                         Primary author: Ceram Research