Pressure control adjustable strontium barium titanate-based composite ceramic materials and method for preparing same

• Main Authors: DONG GUIXIA, CUI JIANDONG, MAO CHANGHUI, MA SHUWANG, YANG ZHIMIN, DU JUN
• Format: Patent
• Language: Chinese; English
• Published: 07.01.2009
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TREATMENT OF NATURAL STONE

The invention belongs to the technical field of preparation of microwave ceramics, in particular relates to a pressure control adjustable barium strontium titanate-base compound ceramic material and a preparation method thereof. The compound ceramic material is prepared as follows: Ba(1-x)SrxTiO3 is compounded with Mg(1-y)ZnyO with low dielectric constant and low dielectric loss; little Ta2O5 is added to modify the compound ceramics of (1-m)Ba(1-x)SrxTiO3-mMg(1-y)ZnyO so as to meet the performance requirements of pressure control adjustable microwave ceramics with proper dielectric constant, low microwave dielectric loss, high pressure control adjustability and so on. The barium strontium titanate-base compound ceramic material prepared by adopting the solid reaction process or the coprecipitation coating process is cold isostatic compacted without adding any forming agent and is sintered under atmospheric pressure, thus obtaining high density and high purity ceramic blocks. The pressure control adjustable ba