Tungsten oxide insulating glass can effectively prevent ultraviolet rays come into the room, and protect people skin health, especially for infants’ and children’ skin health.

In order to save the cost, the production of Mo crucible mainly uses the assembling mold with the method of powder metallurgy. 

The feature of Mo crucible is that the part is composed of wall cylinder and the hypo-cone.

The ratio of height to thickness of the wall cylinder is close to 8. It is easy to generate the cracks on the surface during the manual pressing. Therefore, we use the assembling molds and adopt the method of powder metallurgy to solve this problem. Due to the friction between powders and between powder and molds, the pressure loss occurs during the pressing. We adopt the double-direction pressing in order to increase the density of hypo-cone and ensure the uniformity of green compact density. After finishing the first pressing, the die cushion will be removed and the second pressing starts. In order to facilitate the demolding of the hypo-cone of the Mo crucible from the base, the base is composed of three vertically and equitably separated block (include the die block, the upper die punch and the wall cylinder of the Mo crucible).

The advantages of using the assembling molds are listed as below:

1.0 The use of assembling mold for pressing can help control the density of various parts of Mo crucible, and ensure that the density of parts of the parts are consistent.Therefore, it improves the performance of the process.

2.0 The adoption of double-direction pressing compensates for the low density caused by the pressure loss and increases the density of every part.

3.0 The base of assembling mold is composed of three parts which can solve the problem that the hypo-cone part is not easily demolded. The application of assembling mold is one of the effective ways to produce the Mo crucible. The promotion of this method can show the feature of powder metallurgy production and accelerate the development of powder metallurgy industry.

Tungsten oxide insulating glass is a new type of eco-friendly building material. During the glass producing process, a proper proportion of rare metal oxide tungsten trioxide is added to make the glass have better thermal insulation performance, and barrier the ultraviolet rays and infrared ray from the sun. In Europe and America, it has become the industry standards to use the thermal insulating glass in the architecture project. The increasingly energy crisis has got the Chinese government attention, and the government cast the proposal to build eco-friendly society through using the eco-friendly and energy-saving materials in the different industries.

Iridium is the element in Ⅷseries. The Iridium is the main product of Iridium which is characterized by high melting point, boiling point, hardness, density, elastic modulus and corrosion resistance and low Poisson’s ratio. One of its main application is to combine with tungsten in order to produce tungsten iridium stream mouth. 

The iridium tube owns the following properties:

1.0 High corrosion resistance

2.0 High erosion resistance of silicate at elevated temperature

3.0 High erosion resistance of the melting reagent

4.0 Good plasticity at over 1600 centigrade

5.0 High elastic modulus, low Poisson’s ratio and low plasticity at low temperature

6.0 High melting point, boiling point, hardness and density

7.0 Good ductility, electrical conductivity and heat conductivity

Tungsten iridium stream mouth is the combination of tungsten basal body and the iridium tube. Its properties (such as the wear resistance, hardness, strength and so on) got a further improvement so that guarantees the uniformity of products. It is these properties that make it an indispensable component in today's high-tech crystal industry. The density of the tube is not less than 21.00g/cm3, and the purity of iridium is not less than that of SM-Ir99.95 iridium powder in the GB/T 1422. The degree of curvature is not more than 5mm/m, and its internal and external surfaces are smooth without the defects, such as burr, crack and so on.

The stream mouth is widely applied the metallurgy of rare earth metals, the heater of the induction furnace, the smelting of the silex and so on.