Glass Melting Molybdenum Electrode Price in Early November 2022

Ø72x520mm glass melting molybdenum electrode price is 1,400.00 USD/PC in the first half of November 20222. This kind of electrode has been widely used in glass melting for many years. 

The electrode made of molybdenum has good advantages of high melting point, high strength and hardness at high temperature, as well as good electrical and thermal conductivity and good corrosion resistance. The use of moly electrodes to replace the original heavy oil and gas energy can effectively reduce environmental pollution and improve the quality of glass. Molybdenum electrode rod is a kind of molybdenum electrode product, its surface is bright gray metallic luster with density more than 10.15g/cm3. They are mainly used for electric glass furnaces, electric light sources and electric vacuum parts.

If you have any inquiry of glass melting molybdenum electrode, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten WeChat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth

Cu/Mo/Cu Heat Sink Price in Early November 2022

0.4x3.715x1.5mm Cu/Mo/Cu heat sink price is 1.10USD/PC in the first half of November 2022. They are mainly used in radio frequency, microwave and semiconductor high-power devices, heat sinks, lead frames, low-expansion layers and heat conduction channels of multilayer printed circuit boards (PCBs).

Cu/Mo/Cu heat sink (CMC) is a composite material with a similar sandwich structure, the core material is molybdenum, and both sides are covered with copper. The basic concept of the design is to use the high thermal conductivity of copper and the low thermal expansion characteristics of molybdenum. By adjusting the thickness ratio of copper, molybdenum and copper, it can achieve a thermal expansion coefficient matching ceramic materials and semiconductor materials, and a higher thermal conductivity. The expansion coefficient and thermal conductivity are designable.

The ideal heat sink material should have a linear expansion coefficient CTE, which is basically matched with the chip, and has the highest possible thermal conductivity, especially the Z-direction (thickness) thermal conductivity, so that the heat of the packaged chip and other electronic devices can be quickly discharged. In order to increase its power density, achieve high power, reduce the volume and realize the miniaturization of the device. CMC material is now the one of the materials to meet above requirements.  

If you have any inquiry of Cu/Mo/Cu heat sink, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com
Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten WeChat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth

Molybdenum Disilicide Powder Is Used to Produce MoSi2 Heaters and Thermocouple Protection Tubes

Like tungsten disilicide (WSi2) powder, molybdenum disilicide powder is also an inorganic compound composed of one transition metal atom (both tungsten and molybdenum are transition metal elements) and two non-metallic silicon atoms. 

It is a black powder, and the chemical formula is MoSi2, the molecular weight is 152.11, the purity is as high as 99.9%, the crystal structure is square, and the CAS number is 12136-78-6.

The main components of MoSi2: Si (T.C) total silicon 36%~38%, the rest is molybdenum content; MoSi2 impurity content: free silicon (F.Si) 0.1%, Fe0.03%, Al0.01%, N0. 01%, C0.03%, O0.15%. MoSi2 powder commonly used particle size specifications: 300 mesh, 400 mesh, 500 mesh, 3.5~2.6μm, 2.3~1.5μm.

In terms of physical and chemical properties, molybdenum disilicide is a gray metallic solid with a melting point of about 2030°C and a density of about 6.26g/cm3. It is insoluble in most acids except nitric acid and hydrofluoric acid. It has low thermal expansion coefficient (8.1×10-6K-1), good electrical and thermal conductivity, dual characteristics of metal and ceramics, high temperature oxidation resistance and other characteristics. 

Specifically, at high temperatures greater than 1000 °C, a silicon dioxide passivation layer can be formed on its surface to prevent further oxidation, and it has a very high Young's modulus, but it is brittle at low temperatures, and in an environment exceeding 1200 °C will lose creep resistance.

About production process, MoSi2 powder can be obtained by direct reaction of Mo powder and Si powder. MoSi2 parts can be made by cold pressing sintering or hot pressing.

In terms of use, heating elements made of molybdenum disilicide powder are mainly used in the production of glass, steel, electronic components, ceramics and other products in electric melting furnaces. In addition, the substance can also be used as a surface coating material for high temperature resistant ceramics, thermocouple protection tubes or evaporating appliances.

If you have any inquiry of molybdenum disilicide powder, please feel free to contact us:

Email: sales@chinatungsten.com/sales@xiamentungsten.com

Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten WeChat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth

MoSi2 Heating Elements Are Used in Vacuum Furnaces and Glass Furnaces

Molybdenum disilicide heating element, also known as MoSi2 heating element, MoSi2 heater, silicon molybdenum rod or molybdenum disilicide heater, is an excellent resistance heating element with the advantages of high temperature resistance, low aging, anti-oxidation. 

They are commonly used in various heat treatment furnaces, denture sintering furnaces, experimental electric furnaces, vacuum furnaces, tunnel kilns, roller kilns, casting furnaces, smelting furnaces, glass furnaces and other high-temperature equipment.

According to different shapes, MoSi2 heating elements can be divided into straight rods, U-shaped rods, W-shaped rods, gun-shaped rods, five-section rods, grooved rods, single-threaded rods, and bent right-angle rods. In addition, there are special-shaped products such as MoSi2 through tubes, MoSi2 thermocouple protection tubes, and MoSi2 probes.

No matter what shape they are, a bright and dense quartz glass film will be formed on the surface to protect the inner layer of the silicon molybdenum rod from oxidation when they are used in a high temperature oxidizing atmosphere. However, when the surface temperature of the element is greater than 1700 degrees Celsius, the quartz glass film will melt, gather into droplets, and lose its protective effect. In addition, the components are not suitable for long-term use in the range of 400-700 °C, otherwise they will be pulverized due to strong oxidation at low temperature.

The operating temperature of molybdenum disilicide heating elements is generally 500-1700 ℃. The use temperature of heating elements with different specifications is different; the same heating element can be used at different temperatures in different atmospheres. For example, under air, the operating temperature of the 1700 type element is 1700°C, and the 1800 type element is 1800°C; under nitrogen, the 1700 type element is 1600°C, and the 1800 type element is 1700°C; under nitrogen, the 1700 type and 1800 type elements are used. Both are 1100-1450℃.

In terms of resistance characteristics, the resistivity of molybdenum disilicide heating elements increases with temperature; under normal operating conditions, the resistance generally does not change with the length of use.

If you have any inquiry of MoSi2 heating element, please feel free to contact us:
Email: sales@chinatungsten.com/sales@xiamentungsten.com
Tel.: +86 592 5129696/+86 592 5129595

Fax: +86 592 5129797

Scan QR code of Chinatungsten WeChat platform to follow up the daily latest price and market of tungsten, molybdenum and rare earth.