Sintering - Wikipedia

Sintering is the process of compacting and forming a solid mass of material by heat or pressure without melting it to the point of liquefaction.. Sintering happens naturally in mineral deposits or as a manufacturing process used with metals, ceramics, plastics, and other materials.The atoms in the materials diffuse across the boundaries of the particles, fusing the particles together and ...

MIM Debinding Sintering Furnace - vacfurnace.com

4. MIM debinding sintering furnace has functions of slow vacuum, minor positive pressure sinter, partial pressure sinter, minor negative pressure debinding and minor positive pressure debinding. 5. The furnace adopts advanced refractory structure and materials, which features good insulation performance and less heat absorption.

Refractory | industrial material | Britannica.com

Refractory, any material that has an unusually high melting point and that maintains its structural properties at very high temperatures.Composed principally of ceramics, refractories are employed in great quantities in the metallurgical, glassmaking, and ceramics industries, where they are formed into a variety of shapes to line the interiors of furnaces, kilns, and other devices that process ...

Sintering of refractory metals - ScienceDirect

High sintering temperatures are generally needed to process refractory metals due to their high melting temperatures, but specific conditions depend on the particular alloy, particle size and impurities. The tendency of refractory metals to oxidize requires reducing atmospheres or vacuum for sintering.

Powder Metallurgy Sintering Considerations - CM Furnaces Inc

Oct 17, 2015· Another key design element for powedered metallurgy sintering is the quality of the refractory used in the furnace. It must be non-reactive in pure hydrogen or mixed hydrogen atmopheres and for this reason high alumina or alumina-silicates are typically chosen for the refractory material.

Sintered Mullite And Fused Mullite Production Process

Sintering process composition of mullite process elements is the purity of the material, fineness and calcination temperature. Fused mullite production process. The ingredients are mixed and charged into an electric arc furnace to melt the mullite clinker.

Refractory Molds for Glass Sintering - p2infohouse.org

REFRACTORY MOLDS FOR GLASS SINTERING FINAL REPORT TABLE OF CONTENTS Page ... The process requires precise engineering of both mold materials and mold design to match the glass type, the product application, and scale of the operation. ... These materials consist of a refractory hydraulic setting cement phase, typically

(PDF) Sintering effect of calcium carbonate in high ...

Aiming to investigate the role of calcium carbonate in inducing the formation of elongated CA6 grains and also identify its sintering effect during the thermal treatments of high-alumina castables ...

What is the impact of refractory materials on sintering ...

Sintering temperature and holding time is an important external sintering refractory material. With the increase of temperature, the vapor pressure of the material increases, the diffusion coefficient increases, and the viscosity of the liquid pha...

US1071488A - Process and apparatus for sintering ...

US1071488A - Process and apparatus for sintering refractory materials. - Google Patents Process and apparatus for sintering refractory materials. Download PDF Info Publication number US1071488A. ... material process current pressure Prior art date 1912-05-28

Refractory sintering - sunriserefractory.com

For refractory materials, sintering is very important, whether it is natural raw materials, or synthetic raw materials, have to be burned, to sinter before use, fire-retardant refractory products is to achieve the date of sintering. Unshaped refractory materials in the process of gradually sintering.

Effects of Sintering Processes on Microscopy of CAS2-Al2O3 ...

CAS2-Al2O3 (Anorthite-alumina) refractory materials were prepared with magnesium slag, kaolin from Shanxi province of China and alumina as raw materials. The effects of sintering temperature, holding time and the rate of heating on the microscopic structures were investigated. The results showed that the sintering temperature and holding time are more important to CAS2-Al2O3 refractory ...

Refractory sintering_SINOSTEEL REFRACTORY

For refractory materials, sintering is very important, whether it is natural raw materials, or synthetic raw materials, have to be burned, to sinter before use, fire-retardant refractory products is to achieve the date of sintering. Unshaped refractory materials in the process of gradually sintering.

FIELD ASSISTED SINTERING OF REFRACTORY CARBIDE …

FIELD ASSISTED SINTERING OF REFRACTORY CARBIDE CERAMICS AND ... and pressure-less sintering (PL). Materials were analyzed for mechanical and bulk properties, including characterization of density, hardness, fracture ... efforts to scale up the FAST sintering process while maintaining similar results will require

Quantitative Formulation of Mechanism of Sintering Process ...

describes a property of the used material which varies during the sintering process) and t (duration of the sintering process). This equation is a quantitative description of sintering of refractory concrete during secondary state creep under the form of an exponential function: x = k· tn (4) Where:

refractory in alumina sinter process - morningwarrior.nl

Sintering effect of calcium carbonate in high-alumina refractory ... grains and also identify its sintering effect during ... process of the alumina ... Refractory sintering - sunriserefractory.com For refractory materials, sintering is very important, ...

Boron sources as sintering additives for alumina-based ...

Boron sources as sintering additives for alumina-based refractory castables. ... Boron sources as sintering additives for alumina-based refractory castables ... sintering process of this ...

A Binding Matter: The Role of Binders in the Ceramic ...

Oct 01, 2001· Advanced Ceramics Forming and Finishing Refractories A Binding Matter: The Role of Binders in the Ceramic Sintering Process Poly(alkylene carbonate) binders have been shown to burn out cleanly and uniformly, while providing high green strength to refractory products.

High Alumina Cement - RS High Alumina Refractory Company

Because of its low content of impurities, white calcium aluminate cement is widely used to prepare high-grade refractory castable. In the sintering process of raw materials, CA minerals are firstly formed by solid phase reaction. Because the high reactivity of limestone after decomposition, a small amount of C12A7 minerals will appear.

Products: Electrical Contacts - Contact Technologies Inc

Sintering: When processing refractory compositions, in addition to driving off binders and lubricants, sintering in a high temperature furnace allows the creation of metallurgical bonds between the powder particles and the creation of a "refractory skeleton" that can be infiltrated or repressed.

Pressing And Sintering Of Powder Parts

Primary variables defining a powder sintering operation are time, temperature and furnace atmosphere. Sintering temperature is typically .7 to .9 of the powder's melting point. Sintering time is dependent on manufacturing process factors and material. Tungsten, for example, is sintered for a relatively long time.

Sintering of clay-chamotte ceramic composites for ...

Sintering of clay-chamotte ceramic composites for refractory bricks. ... grains size repartition and shape as well as to the individual transformation and interactions of components during the sintering process. In general, initial compositions are selected to attain the desired performance of final products. ... Common refractory materials ...

Sintering Furnace – CM Furnaces

Jun 12, 2017· High-temperature sintering furnaces are utilized in powder metallurgy for sintering stainless steel and, in some cases, iron-based materials. They are exclusively used in refractory-metal fabrication of molybdenum, tungsten and rhenium. High-temperature sintering furnaces are also utilized in the nuclear-fuel industry for sintering uranium oxide.

Sintering Aids in Powder Metallurgy - Platinum Metals Review

fabricating a variety of materials, and this paper reviews studies made of the sintering of refractory metals when this process is promoted by addition of a minor amount of a platinum group metal activator. The manufacture of engineering metals and alloys in fabricated forms generally commences with the melting and casting of ingot material

Technology - Process Materials

Thermal Spraying, a technology that puts a highly functional coating on the surface of various substrates, is a core competence of Process Materials. In this process, the metal, alloy or ceramic along with other materials are melted, and then the molten materials are sprayed on the substrate to form a coating layer.

REFRACTORY MOLDS FOR GLASS SINTERING

REFRACTORY MOLDS FOR GLASS SINTERING Recovered container glass can be formed into marketable products by filling a refractory mold with powdered glass and heating the glass and mold to a high temperature so that the glass sinters (or bonds) to take the shape of the mold. The process creates high value-added uses for recovered container glass.

Refractory Alloy Sintering Process - Refractory Metals and ...

Jun 07, 2017· The Refractory alloy sintering can be divided into six stages. 1. Agent Removal & Burning Stage With the rising of temperature, the molding agent gradually decomposes or vaporizes with the sintered body left. At the same time, the molding agent more or less adds carbon to sintered body. The rising amount of carbon changes with […]

Sintering Aids in Powder Metallurgy | Johnson Matthey ...

Now powder metallurgical methods are widely used for fabricating a variety of materials, and this paper reviews studies made of the sintering of refractory metals when this process is promoted by the addition of a minor amount of a platinum group metal activator.