{"id":3689,"date":"2012-12-18T05:03:39","date_gmt":"2012-12-18T03:03:39","guid":{"rendered":"http:\/\/www.ilkkimbuldu.com\/?p=3689"},"modified":"2016-12-25T14:18:25","modified_gmt":"2016-12-25T12:18:25","slug":"selenyumu-kim-buldu","status":"publish","type":"post","link":"https:\/\/www.ilkkimbuldu.com\/?p=3689","title":{"rendered":"Selenyum’u kim buldu"},"content":{"rendered":"

Selenium\u00a0periyodik tablonun VI A grubunda bulunan kimy\u00e2sal\u00a0bir element. Se sembol\u00fcyle g\u00f6sterilir. Tabiatta serbest halde \u00e7ok azd\u0131r. Genellikle kur\u015fun, demir, bak\u0131r ve g\u00fcm\u00fc\u015f cevherlerinde
\ns\u00fclf\u00fcrlerle birlikte selen\u00fcrler h\u00e2linde bulunur.<\/p>\n

Kur\u015fun odalar metoduyla s\u00fclf\u00fcrik asit \u00fcretimi yap\u0131l\u0131rken\u00a0kur\u015fun odalar \u00e7amurunda bir yan \u00fcr\u00fcn olarak a\u00e7\u0131\u011fa \u00e7\u0131kar. S\u00fclfit asidiyle elementel h\u00e2le indirgenen\u00a0selenyum, nitrat asidiyle y\u00fckseltgenir. Buradan indirgenme yap\u0131larak elementel selenyum elde edilir 1817 y\u0131l\u0131nda Berzelius<\/strong> taraf\u0131ndan kur\u015fun odalar \u00e7amurundan\u00a0elde edilmi\u015ftir.<\/p>\n

Selenyum metali fotoelektrik pillerde, g\u00fcne\u015f pillerinde ve foto\u011fraf\u00e7\u0131l\u0131kta faydalan\u0131lan
\npozometrelerde kullan\u0131l\u0131r. Ayr\u0131ca alternatif ak\u0131m\u0131 do\u011fru ak\u0131ma \u00e7evirdi\u011finden redres\u00f6rlerde faydalan\u0131l\u0131r.
\nCama az miktarda kat\u0131ld\u0131\u011f\u0131nda renk giderici olarak i\u015f g\u00f6r\u00fcr, \u00e7ok miktarda kat\u0131ld\u0131\u011f\u0131nda ise sinyal
\nlambalar\u0131nda faydalan\u0131lan parlak k\u0131rm\u0131z\u0131 bir renk verir.<\/p>\n

Selenyum ayr\u0131ca seramiklerin ve \u00e7elik kaplar\u0131n\u00a0k\u0131rm\u0131z\u0131 minelerinde, kau\u00e7u\u011fun vulkanizasyonunda istif\u00e2de edilir. Bile\u015fikleri pigmentlerde kullan\u0131l\u0131r.\u00a0Sodyum selenat (Na2SeO4) krom ve al\u00fcminyumun korozyona kar\u015f\u0131 direncini artt\u0131r\u0131r.<\/p>\n","protected":false},"excerpt":{"rendered":"

Selenium\u00a0periyodik tablonun VI A grubunda bulunan kimy\u00e2sal\u00a0bir element. Se sembol\u00fcyle g\u00f6sterilir. Tabiatta serbest halde \u00e7ok azd\u0131r. Genellikle kur\u015fun, demir, bak\u0131r ve g\u00fcm\u00fc\u015f cevherlerinde s\u00fclf\u00fcrlerle birlikte selen\u00fcrler h\u00e2linde bulunur. Kur\u015fun odalar…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[92],"tags":[2718,2191],"class_list":["post-3689","post","type-post","status-publish","format-standard","hentry","category-bilim","tag-berzelius","tag-selenyum"],"_links":{"self":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts\/3689"}],"collection":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3689"}],"version-history":[{"count":4,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts\/3689\/revisions"}],"predecessor-version":[{"id":6570,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=\/wp\/v2\/posts\/3689\/revisions\/6570"}],"wp:attachment":[{"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3689"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3689"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ilkkimbuldu.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3689"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}