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Browse Prior Art Database

Air Blender Process for Ceramic Powders

IP.com Disclosure Number: IPCOM000043553D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 36K

Publishing Venue

IBM

Related People

Hamilton, KJ: AUTHOR [+2]

Abstract

Multilayer ceramic (MLC) substrates are produced by sintering multiple layers of ceramic green sheets. The raw ceramic powder (alumina) from which the green sheets are made must have uniform particle size distribution, density and surface area to assure uniform shrinkage in the sintered ceramic substrate. Disclosed here is an improved air blender. (Image Omitted) Referring to the figure, air blender 1 includes a ceramic feed tube 2 and a dust collector/filter system 3. A plurality of air jets 6 (only one shown) are mounted around the periphery of cone 7. The air jets inject pulsating air into cone 7 to fluidize and homogenize the ceramic powder. Injector valves on air jets 6 release metered amounts of compressed air, with the pulses and volume of air being controllable by adjusting the valve stroke.

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Air Blender Process for Ceramic Powders

Multilayer ceramic (MLC) substrates are produced by sintering multiple layers of ceramic green sheets. The raw ceramic powder (alumina) from which the green sheets are made must have uniform particle size distribution, density and surface area to assure uniform shrinkage in the sintered ceramic substrate. Disclosed here is an improved air blender.

(Image Omitted)

Referring to the figure, air blender 1 includes a ceramic feed tube 2 and a dust collector/filter system 3. A plurality of air jets 6 (only one shown) are mounted around the periphery of cone 7. The air jets inject pulsating air into cone 7 to fluidize and homogenize the ceramic powder. Injector valves on air jets 6 release metered amounts of compressed air, with the pulses and volume of air being controllable by adjusting the valve stroke. An air-operated discharge cone 5 functions as a seal for blender opening 4, and is designed to keep the flowing ceramic in the path of the blending air. All internal components of air blender 1 are coated with Al2O3 in order to minimize contamination.

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