{"id":1239,"date":"2021-07-26T16:30:41","date_gmt":"2021-07-26T07:30:41","guid":{"rendered":"https:\/\/www.shinkosha.com\/english\/?page_id=1239"},"modified":"2021-07-26T16:53:28","modified_gmt":"2021-07-26T07:53:28","slug":"dielectric-properties-of-sapphire","status":"publish","type":"page","link":"https:\/\/www.shinkosha.com\/english\/techinfo\/feature\/dielectric-properties-of-sapphire\/","title":{"rendered":"Dielectric properties of Sapphire"},"content":{"rendered":"

\u3000Sapphire is an insulator, and even with the addition of various dopants, it is difficult to make it conductive. For this reason, it is often used as a material that takes advantage of its insulating properties.<\/span><\/p>\n

\u3000On the other hand, sapphire is also a promising material for microwave applications because of its extremely low dielectric loss factor (\u03b5<\/span>\u30fbtan \u03b4) and chemical stability.<\/span><\/p>\n

\u00a0<\/span><\/p>\n\n\n\n\n\n\n\n\n\n
\u00a0<\/th>\nSapphire<\/span><\/th>\nMgO<\/span><\/th>\nSilica glass<\/span><\/th>\n<\/tr>\n<\/thead>\n
Temperature<\/span><\/th>\nRoom Temperature<\/span><\/th>\n<\/tr>\n
Frequency<\/span><\/th>\n13GHz<\/th>\n30GHz<\/th>\n14~16GHz<\/th>\n10GHz<\/th>\n<\/tr>\n
\n

Relative permittivity<\/span><\/p>\n

\u03b5r<\/sub><\/span><\/th>\n

9.4 \uff08\u22a5c)<\/th>\n9.41 \uff08\/\/c)<\/th>\n\n

9.85<\/p>\n<\/th>\n

\n

3.81<\/p>\n<\/th>\n<\/tr>\n

\n

Dielectric loss<\/span><\/p>\n

\u00a0tan \u03b4<\/span><\/th>\n

1.6\u00d710-5\u00a0<\/sup>\uff08\u22a5c)<\/th>\n3\u00d710-5\u00a0<\/sup>\uff08\/\/c)<\/th>\n0.78\u00d710-6<\/sup><\/p>\n<\/th>\n1.7\u00d710-4<\/sup><\/p>\n<\/th>\n<\/tr>\n
Chemical stability<\/span><\/th>\nChemically stable and can be used at temperatures above 1000\u00b0C<\/th>\n\n

Tidal solubility, requires humidity control<\/p>\n<\/th>\n

\n

Devitrification appears due to high temperature and impurities<\/p>\n<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

\u3000Sapphire is an insulator, and even with the addition of various dopants, it is difficult to make it conductive. For this reason, it is often used as a material that takes advantage of its insulating properties. \u3000On the other hand, sapphire is also a promising material for microwave applications because of its extremely low dielectric […]<\/p>\n","protected":false},"author":8,"featured_media":1260,"parent":1049,"menu_order":53,"comment_status":"closed","ping_status":"closed","template":"page-template-techinfo-child.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-1239","page","type-page","status-publish","has-post-thumbnail","hentry"],"acf":[],"yoast_head":"\nDielectric properties of Sapphire - SHINKOSHA Crystals for a bright future<\/title>\n<meta name=\"description\" content=\"Shinkosha is a leading company of oxide single crystal production. 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