Siliceous composition and method for obtaining same
AssigneeFib-Services Intellectual S.A.
InventorsOsvaldo Di Loreto, Jacques Tirlocq
Life of this patent
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Abstract
A powdery composition based on silica for ceramic welding, in particular by projection, comprising from 10 to 90% of a phase of siliceous particles comprise at least 80% by weight of cristobalite and at most 15% by weight of tridymite, based on the total weight of the composition, from 90 to 10% by weight of conventional additives forming a binding phase, based on the total weight of the composition, said siliceous particles having a d50 comprised between 350 and 800 μm, preferably between 400 and 500 μm.
Claims14
A method for preparing a powdery composition based on silica for ceramic welding, comprising the steps:
- (a) preparing a phase of siliceous particles comprising at least 80% by weight of cristobalite and at most 20% by weight of tridymite, based on the total weight of the phase of siliceous particles;
- and
- (b) mixing said phase of siliceous particles with one or more additives forming a binding phase in ceramic welding,
- said step for preparing said phase of siliceous particles comprising a supply of quarry quartz sand particles having a d50 comprising between 350 and 800 μm in a rotary furnace attaining 1,400° C. to 1,500° C. in an area called the hottest area and for baking for a predetermined period of time with said phase of siliceous particles being obtained.
Dependencies are inferred from the claim text.