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<P style="TEXT-ALIGN: center"><SPAN style="FONT-FAMILY: Arial"><SPAN style="FONT-FAMILY: arial"> </P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt">텅스텐(Tungsten)이란 스웨덴語로 "무거운 돌"이라는 뜻이다.</SPAN></SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt">그런데 텅스텐은 원소기호가 W인데 그 이유는 텅스텐을 함유하는</SPAN></SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt">광석이 </SPAN></SPAN><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt">월파트(Wolfat)라 불리고 이 광석에서 처음으로</SPAN></SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt">텅스텐을 </SPAN></SPAN><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt">해리해 월프람(Wolfram)이라 부르기 때문이다.</SPAN></SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt"></SPAN></SPAN> </P></P>
<P style="TEXT-ALIGN: center" align=center><img src="https://t1.daumcdn.net/cfile/cafe/196E244F4F2D0E740E" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="508" border="0" hspace="1" vspace="1" width="508" id="A_196E244F4F2D0E740E256D"/></P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt"><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 11pt"><STRONG>Spain 1983, June 22 sc#2338</STRONG></SPAN></SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 11pt"><STRONG>Discovery of Tungsten Bicentenary.</STRONG></SPAN></SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt"></SPAN></SPAN> </P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt">1781년 스웨덴의 칼 빌헬름 셀레(Carl Wilhelm Scheele, 1742~1786)는</SPAN></SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt">회중석이라는 광물에서 새로운 산화물을 분리해냈고</SPAN></SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt">2년후 스페인의 두 화학자 Juan Jose de Elhuyar와 그의 동생</SPAN></SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt">Fausto de Elhuyar는 철망간중석을 분석해 생긴 산화물에</SPAN></SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt">숯으로 가열하여 산성을 줄임으로서 텅스텐을 발견하였다.</SPAN></SPAN></P></SPAN></SPAN>
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<P style="TEXT-ALIGN: center"></SPAN> </P></P>
<P style="TEXT-ALIGN: center"><img src="https://t1.daumcdn.net/cfile/cafe/1728D44C4F2D0E3A11" class="txc-image" style="FLOAT: none; CLEAR: none" actualwidth="382" border="0" hspace="1" vspace="1" width="382" id="A_1728D44C4F2D0E3A118AE1"/></P>
<P align=center><SPAN style="FONT-FAMILY: arial"><SPAN style="FONT-SIZE: 9pt"> <SPAN style="FONT-FAMILY: arial; FONT-SIZE: 11pt"><STRONG>Luxembourg 2003, Sept. 23 sc#1116</STRONG></SPAN></SPAN></SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial; FONT-SIZE: 11pt"><STRONG>Electrification of Luxembourg, 75th anniv.</STRONG></SPAN></P>
<P align=center> </P>
<P align=center><SPAN style="FONT-FAMILY: arial">순수한 텅스텐은 부드럽지만 불순물이</SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial">섞이면 딱딱해지고 쉽게 부서진다.</SPAN><SPAN style="FONT-FAMILY: arial" id=husky_bookmark_end_1328350424781></SPAN><SPAN style="FONT-FAMILY: arial" id=husky_bookmark_start_1328350424781></SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial">또 녹는점이 금속중에 가장 높고 (3410℃)</SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial">증기압도 낮으며 가는 선으로 </SPAN><SPAN style="FONT-FAMILY: arial">가공이 가능해</SPAN></P>
<P align=center><SPAN style="FONT-FAMILY: arial">백열전구의 필라멘트(Filament)에 사용 된다.</SPAN></P></SPAN>
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테마틱 자료와 작품
텅스텐(Tungsten)
강경원
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12.02.04 19:55
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