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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">izmertech</journal-id><journal-title-group><journal-title xml:lang="ru">Измерительная техника</journal-title><trans-title-group xml:lang="en"><trans-title>Izmeritel`naya Tekhnika</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0368-1025</issn><issn pub-type="epub">2949-5237</issn><publisher><publisher-name>ФГУП "ВНИИФТРИ"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">izmertech-469</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ТЕПЛОФИЗИЧЕСКИЕ ИЗМЕРЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>THERMOPHYSIC MEASUREMENTS</subject></subj-group></article-categories><title-group><article-title>Сравнительные исследования ампул реперной точки плавления эвтектики кобальт – углерод, созданных во ВНИИМ и ВНИИОФИ</article-title><trans-title-group xml:lang="en"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хлевной</surname><given-names>Б. Б.</given-names></name></name-alternatives><email xlink:type="simple">khlevnoy-m4@vniiofi.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сильд</surname><given-names>Ю. А.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Матвеев</surname><given-names>М. С.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Григорьева</surname><given-names>И. А.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фуксов</surname><given-names>В. М.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Всероссийский научно-исследовательский институт оптико-физических измерений, Москва</institution><country>Russian Federation</country></aff><aff xml:lang="ru" id="aff-2"><institution>Всероссийский научно-исследовательский институт метрологии им. Д. И. Менделеева, С.-Петербург</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2013</year></pub-date><pub-date pub-type="epub"><day>07</day><month>02</month><year>2023</year></pub-date><volume>0</volume><issue>1</issue><fpage>49</fpage><lpage>53</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; ФГУП "ВНИИФТРИ", 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">ФГУП "ВНИИФТРИ"</copyright-holder><copyright-holder xml:lang="en">ФГУП "ВНИИФТРИ"</copyright-holder><license xlink:href="https://www.izmt.ru/jour/about/submissions#copyrightNotice" xlink:type="simple"><license-p>https://www.izmt.ru/jour/about/submissions#copyrightNotice</license-p></license></permissions><self-uri xlink:href="https://www.izmt.ru/jour/article/view/469">https://www.izmt.ru/jour/article/view/469</self-uri><abstract><p>Разработаны и изготовлены ампулы на основе высокотемпературной реперной точки плавления эвтектики кобальт – углерод (1324 ºС), предназначенные для радиационной термометрии. Проведены сличения ампул для определения возможной разности температур плавления. Для измерения температуры реперной точки использованы радиационные термометры яркостного типа с узкой спектральной полосой чувствительности в районе длины волны 650 нм. Представлены детали сличений и предварительные результаты, которые демонстрируют совпадение температур сравниваемых ампул в пределах 20 мК.</p></abstract><trans-abstract xml:lang="en"><p>Two Russian national metrological institutes – VNIIM and VNIIOFI – independently designed and created the high-temperature fixed point blackbody cells of the cobalt – carbon eutectic (1324 ºС). A comparison of the developed Co-C cells was carried out for determination a probable difference in the cells melting temperatures. Radiance-mode radiation thermometers with central wavelength of about 650 nm were used for the fixed-point melting temperature measurements. This article presents the comparison details and its preliminary results and shows the concidence between melting temperatures of the compared cells within 20 mK limits.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>реперная точка</kwd><kwd>кобальт</kwd><kwd>углерод</kwd><kwd>эвтектика</kwd><kwd>сличение</kwd><kwd>радиационная температура</kwd><kwd>термометрия</kwd><kwd>черное тело</kwd><kwd>fixed point</kwd><kwd>cobalt</kwd><kwd>carbon</kwd><kwd>eutectic</kwd><kwd>comparison</kwd><kwd>radiation temperature</kwd><kwd>thermometry</kwd><kwd>blackbody</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Machin G. е. а. A Concerted International Project to Establish High-Temperature Fixed Points for Primary Thermometry // Int. J. Thermophys. 2007. V. 28. Р. 1976–1982.</mixed-citation><mixed-citation xml:lang="en">Machin G. е. а. 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