| 摘要 |
<p>An alumina porcelain composition is described, consisting essentially of from 99.4 to 99.9% by weight Aℓ<Sub>2</Sub>O<Sub>3</Sub> and a remainder consisting of Si0<Sub>2</Sub>, CaO and MgO within a compositional range defined by the straight lines connecting the following points A, B, and C, in the weight basis ternary composition diagram set forth in the attached drawing:
<TableDetails id="tabla01" num="0001"><Image id="ia01" he="22" wi="88" file="IMGA0001.TIF" imgContent="table" imgFormat="TIFF" inline="no" /></TableDetails></p><p>the alumina porcelain composition shows a small high-frequency dielectric loss, and when the composition is utilized as a base for a microwave integrated circuit, the occurrence of problems caused by the cutting of a wiring pattern can be prevented.</p> |
