Abstract:
Particule frittée présentant: la composition chimique suivante, en pourcentages en masse sur la base des oxydes et pour un total de 100%: 22% ≤ ZrO 2 +HfO 2 ≤ 55%, avec HfO 2 ≤ 2 %; 4% ≤SiO 2 ≤ 35%; 6% ≤ Al 2 O 3 ≤ 60%; 0,5% ≤ MgO ≤ 6%; B 2 O 3 ≤5%; moins de 9,0 % d'autres oxydes, et les phases cristallisées suivantes, en pourcentages en masse sur la base des phases cristallisées présentes et pour un total de 100%: 32% ≤ zircon ≤ 80%; 3% ≤ mullite ≤ 15%; zircone + hafnie, éventuellement stabilisés: ≤ 9%; 4% ≤ corindon ≤ 57%; moins de 10 % d'autres phases cristallisées, et une porosité totale inférieure ou égale à 6%.
Abstract:
A ceramic casting method for shape forming of a ceramic green body including the steps of: a) dispersing fine ceramic particles in a polymerizable solvent to form a colloidal ceramic suspension, b) casting the ceramic suspension into the required shape, and c) polymerizing the solvent to solidify the ceramic suspension and form the ceramic green body.
Abstract:
The present invention provides a ceramic foam, comprising: a ceramic slurry prepared by mixing a foam with micro cells or bubbles obtained by a foaming agent diluted in water, silicate, ceramic powder, and additives; and a gelling agent supplied to the ceramic slurry to form a 3D-silica network while maintaining the shape of the ceramic slurry. The ceramic foam is manufactured by diluting a foaming agent in water; forming a large number of closed cells by using a foam system having the water-diluted foaming agent; mixing the obtained foam with silicate, ceramic powder, and additives to form a ceramic slurry; supplying a gelling agent to the ceramic slurry to form a 3D-silica network while maintaining the shape of the ceramic slurry; and drying the ceramic slurry to remove moisture inside, and fusing additives thereon to improve water resistance.
Abstract:
The present invention provides a ceramic foam, comprising: a ceramic slurry prepared by mixing a foam with micro cells or bubbles obtained by a foaming agent diluted in water, silicate, ceramic powder, and additives; and a gelling agent supplied to the ceramic slurry to form a 3D-silica network while maintaining the shape of the ceramic slurry. The ceramic foam is manufactured by diluting a foaming agent in water; forming a large number of closed cells by using a foam system having the water-diluted foaming agent; mixing the obtained foam with silicate, ceramic powder, and additives to form a ceramic slurry; supplying a gelling agent to the ceramic slurry to form a 3D-silica network while maintaining the shape of the ceramic slurry; and drying the ceramic slurry to remove moisture inside, and fusing additives thereon to improve water resistance.
Abstract:
Provided are a multi-component ceramic nano-composite powder that is suitable for forming a sintered ceramic composite and a method of preparing the same. The ceramic nano-composite powder is formed of secondary particles obtained by sintering multi-component ceramic particles with a nano-sized primary particle diameter in nano-scale. The multi-component ceramic particles may be formed of zirconia and alumina. A sintered zirconia-alumina composite formed by sintering the nano-composite powder has greater flexural strength than a sintered composite prepared by mechanically mixing zirconia powder and alumina powder and sintering the mixture.
Abstract:
A method of joining components includes the steps of providing a slurry including a solvent, a ceramic, metal or cermet powder and at least one binder selected from natural monomers or cross linkable polymer compositions. The binder is crosslinked to form a gel. The gel is then placed between the first and at least a second component to be joined. The gel is then sintered to form an article having a gelcast joint binding the first and second components. The resulting joint region will generally have the same strength as the first and second components.