Composition for preparation of articles of calcium oxide

A process for covering a foundry mold with a lining intended to come in contact with molten titanium, comprising the steps of:

• applying to the foundry mold at least one layer of a composition comprising calcined calcium oxide and an organic phase consisting essentially of at least one polyol in a non-aqueous medium, wherein said calcined calcium oxide is present in the amount from 0.5 to 3 kg per liter of the non-aqueous medium in liquid form by a coating method;
• drying each applied layer for at least approximately one hour at ambient temperature before applying a new layer;
• and
• sintering after the last drying step for at least approximately one hour at a temperature from 800.degree. to 1,500.degree. C.

A process for producing a crucible comprising the steps of:

• applying at least one layer of a composition comprising calcined calcium oxide and an organic phase consisting essentially of at least one polyol in a non-aqueous medium, wherein said calcined calcium oxide is present in the amount from 0.5 to 3 kg per liter of the non-aqueous medium to a lost wax model;
• drying the applied layer;
• flash dewaxing at a temperature from 900.degree. to 1,100.degree. C. after the drying step;
• and
• sintering for at least approximately one hour at a temperature form 800 to 1,500.degree. C.