Sintering beryllium oxide

Conclusion

The chief factors influencing the sinterability of beryllium oxide parts are as follows:

pre-firing of the beryllium hydroxide at 1350–1500° and the production of BeO with maximum specific gravity;

pre-grinding of fired BeO to a mean grain size finer than 2–3 microns and rich in structural defects;

the use of 20–30% material in the form of hydrate or poorly calcined form;

the use of plasticizers to ensure the homogeneity of the mixture;

high specific pressing pressure;

holding at final firing temperatures.

As the firing temperature for the beryllium oxide is increased, there is internal rearrangement of the material, a change in the physical-chemical properties, the shape and size of the crystals and in their total surface, to the densification and strengthening of the material, i.e., in the physical-chemical sense there is sintering and recrystallization.