Production of a sintered ceramic dielectric formed from a green sheet having a uniform microporous structure providing uniform dielectric properties and compressibility for lamination of stacked green sheets into a unitary laminate which may be provided with an internal pattern of electrical conductors extending therein. The structure is obtained by blending the ceramic particulate in a solution of a binder resin miscible in a solvent mixture which is formed from a volatile solvent for the binder resin and a less volatile solvent in which the resin is at most only slightly soluble.
This application is a division of copending application Ser. No. 589,305 filed June 23, 1975, which in turn is a continuation-in-part of abandoned application Ser. No. 158,387, filed June 30, 1971.
A method of manufacturing ceramic products. This method comprises the steps of mixing ceramic powder, organic materials imparting formability to the ceramic powder, and a first solvent, thereby preparing a mixture, shaping the mixture thereby forming a product of a simple shape, drying the product, immersing the dried product in a bath of a second solvent, thereby plasticizing the product, and re-shaping the plasticized product.
Ceramic green sheets of controlled microporosity and method of making same have been provided. Controlled microporosity is achieved by including certain ionic species in the ceramic composition, particularly boron, phosphorus and copper oxide.
A ceramic green sheet is formed from a ceramic slurry composition comprising a ceramic powder such as BaTiO.sub.3, a vehicle in the state of emulsion in which an organic binder consisting of polyurethane resin particles having an average particle size of about 120 nm or less is dispersed in an aqueous solvent, and a surfactant comprising an alkyne glycol having one or more triple bonds in its molecule and/or an ethylene oxide addition product of such an alkyne glycol. A very thin aqueous ceramic green sheet is provided that is free from pin holes, and has low surface roughness, high tensile strength and high elongation.
An organic solvent soluble resin and insoluble resin, and a ceramic powder or a metallic powder, if desired, a plasticizer and a desired additive are blended and molded and a molded product is treated with an organic solvent to dissolve the soluble resin, the plasticizer etc. and then, the treated product is fired to obtain a molded ceramic or metal having no cracking nor deformation and having high density.
A process for removing organic materials from an article formed from a slurry of glass and/or ceramic particles, resin binder, and a solvent for the resin binder, the process involving including in the slurry a particulate catalyst selected from the group consisting of Cu, Cu.sub.2 O, CuO, Cu.sub.2 SO.sub.4, CuCl.sub.2, Cu organometallic compounds, and mixtures thereof, the catalyst promoting a rapid and complete removal from the shaped article when heated of the organic materials of the slurry.
