Bubble alumina mix 0.2-5mm

Bubble alumina is an effective high-temperature thermal insulator in structural applications and is appropriate for use at temperatures as high as 1825°C. Bubble alumina’s structure consists primarily of closed, thin-walled cells that combine to give it exceptional hot strength, high creep resistance, low density, and low thermal conductivity. It is pre-fired, contains no organics, and exhibits high microwave and RF transparency. Its high alumina content makes it compatible with many extreme chemical environments. Bubble alumina is manufactured on a custom basis and can be supplied in many sizes. Bubble alumina can achieve the trade‐off between lightweight and overall performance. This material works well to coat a lined forge for protection against flux when welding.

Bubble alumina mix 0.2-5mm production process:

Alumina raw materials are melted in an electric arc furnace at 2200℃. When pouring the melt out, blow the melt with high-pressure air to make the melt dispersed into tiny droplets. The droplets form alumina hollow balls during the cooling process due to surface tension effects. The hollow balls are screened to remove fine powder and big fragments and particles. Iron is removed with the magnetic iron. Broken balls are removed with a ball selecting machine. Then the alumina hollow spheres are packed as the finished products.

Bubble alumina mix 0.2-5mm Features and performance:

Bubble alumina, the crystal form is a-Al2O3 microcrystal. Bubble alumina has low bulk density, low impurity content, and low thermal conductivity. Bubble alumina is the main body, which can be made into products of various shapes. The maximum service temperature is 1800 ° C. The mechanical strength of the products is high, which is several times that of ordinary light products, and the bulk density is only one-half of the corundum products.

Applications of bubble alumina mix 0.2-5mm:

Bubble alumina spheres and their products are lightweight refractory materials with high-temperature resistance and excellent energy-saving and stability. Bubble alumina can be used as high temperature, ultra-high temperature insulation fillers, high-temperature refractory concrete lightweight materials, high-temperature castables, etc. bubble alumina refractory bricks can be used for high-temperature energy saving (>30%) down the flame kiln, shuttle kiln, molybdenum wire furnace, tungsten rod furnace, induction furnace, nitriding furnace, etc. Significant results have been achieved in reducing the weight of the furnace body, transforming the structure, saving materials and energy, and saving energy by more than 40%. Alumina hollow balls have been widely used in high temperature and ultra-high temperature furnaces such as petrochemical industrial gasifiers, carbon black industrial reaction furnaces, metallurgical industrial induction furnaces, etc., and have achieved very satisfactory energy-saving effects.

Chemical compositions of alumina bubble 0.2-5mm:

Chemical compositions Index
Al2O3 (%) ≥ 99
SiO2 (%) ≤ 0.2
Na2O (%) ≤ 0.25
Fe2O3 (%) ≤ 0.15
Maximum Working Temperature (℃) 1850
Granularity (mm) 0.2-5

 

Bubble Alumina(FAQ)

How do i prevent moisture contamination in the abrasive?

Moisture contamination is the number one reason customers call Technical Support. Fortunately, it is usually preventable. There are 4 key ways to keep your abrasive free of moisture:1.Store abrasive properly and always make sure bottles are tightly closed when not in use.2.Keep abrasive in a cool dry location with minimum

What is the d50 value?

The d50 indicates the mean particle size. d50 means that 50% of particles fall within the specified grain size.

What is your sample policy?

We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost. 

How do i know what abrasive is best for my application?

An abrasive’s shape, hardness, and particle size really determine the effectiveness of a MicroBlasting application. Each application is unique, and abrasive selection depends on the composition of the targeted part and the application’s desired result. See our Abrasive Media Selection Guide to choose the most appropriate abrasive for your application.

Can i get sample in free , how long is the time?

Yes, certainly. We will provide the sample is in free below 5 kgs for free, and the freight cost for free in 1kg. We could arrange the existing samples express delivery immediately. For any special samples requirement, it need max 7 days finished. Usually we send samples by TNT ,FEDEX,

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