Commissariat a L'energie Atomique

Commissariat a L'energie Atomique Et Aux Energies Alternatives

Philippe Prene

Pierrick Buvat

Philippe Belleville

Pierre Montmeat

Thomas Bordy

Gilles Le Blevennec

Emmanuelle Schultz

Lionel Hairault

Frédéric Suard

Anthony Larue

Yves Montouillout

Xavier Le Guevel

Herv&eacute; Floch

Nicolas Paul

Laurence Beaurain

Robert Jerisian

Céline Bondoux

Rodrigue Rousier

Clément Sanchez

Marianne Guillemot

Frédéric Thery-Merland

The invention relates to a method for preparing sols of metal oxides, with an aqueous component, which are stable over time and which notably allow the making of thin films having both remarkable optical and abrasion resistance properties. This method comprises: (i) replacing with water all or part of the alcohol or of the alcohols present in an alcoholic sol of a metal oxide, with a neutral or basic pH, and optionally (ii) adjusting the pH of the thereby obtained aqueous or partly aqueous sol to a value of at least 8. The invention also relates to a method for making films from these sols and, in particular, thin films with optical properties and resistant to abrasion. Applications: making optical components for power lasers, making optical fibers, cathodic tubes, etc.

Preparation of stable metal oxide sols, notably for making thin abrasion-resistant films with optical properties

The present invention relates to a magnesium oxide-based (MgO) inorganic coating intended to electrically insulate semiconductive substrates such as silicon carbide (SiC), and to a method for producing such an insulating coating. The method of the invention comprises the steps of preparing a treatment solution of at least one hydrolysable organomagnesium compound and/or of at least one hydrolysable magnesium salt, capable of forming a homogeneous polymer layer of magnesium oxyhydroxide by hydrolysis/condensation reaction with water; depositing the treatment solution of the hydrolysable organomagnesium compound or of the hydrolysable magnesium salt, onto a surface to form a magnesium oxide-based layer; and densifying the layer formed at a temperature of less than or equal to 1000&#xb0; C.

MgO-based coating for electrically insulating semiconductive substrates and production method thereof

The invention relates to a process for preparing a stable sol-gel solution. The solution may be used to form coating materials for metallic substrates, such as silver-based substrates for use in mirrors. The process includes the steps of preparing a sol-gel solution by bringing one or more molecular metal and/or metalloid precursors into contact with a medium comprising an organic solvent, adding at least one mercaptoorganosilane compound to the solution, hydrolyzing the solution obtained, and then adding one or more complexing agents to the solution.

Process for preparing a sol-gel solution and use of this solution to form a coating to protect a substrate having a metal surface

The invention relates to an inorganic polymer material based on tantalum oxide, notably with a high refractive index and mechanically resistant to abrasion, its method of manufacture, in particular making use of precursors based on chlorinated derivatives of tantalum, and optical materials such as antiglare materials and reflecting materials manufactured from this material.

Inorganic polymer material with tantalic acid anhydride base, in particular with high refractive index, mechanically abrasionproof, method of manufacture, optical materials comprising such material

The present invention relates to a method for preparing an optic material by depositing on a substrate at least two layers of inorganic polymeric material, each of these layers containing at least one metal oxide or metalloid oxide, the deposited layers being densified cross-linked by exposure to ultraviolet rays. The invention also concerns the optic material which may be prepared using this method. The optic materials which may be prepared using said method are in particular multilayer materials such as antireflective materials and reflective materials.

Method for preparing a multilayer optical material with crosslinking-densifying by ultraviolet radiation

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Philippe Prene