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Avrasya Ekonometri �statistik ve Ampirik Ekonomi Dergisi Yýl:2022  Sayý: 21  Alan: Nicel Karar Yöntemleri

Deniz Tanju YILMAZ, Süheyla KANBUR
DOÐAL VE SENTETÝK ELMAS ARASINDAKÝ FARKIN LABORATUVAR KOÞULLARINDA DEÐERLENDÝRÝLMESÝ
 
Sentetik elmaslar doðal elmaslara bir alternatif olarak hem mücevherat alanýnda hem de endüstriyel uygulamalarda kullanýlmaya baþlanmýþtýr. Sentetik elmaslarýn dikkate deðer birçok özellikleri göz önüne alýndýðýnda, yalnýzca mücevher malzemesi olmasý deðil, ayný zamanda termal yönetim, kesici aletler, aþýnmaya dayanýklý kaplamalar, optik bileþenler ve muhtemelen yarý iletken elektronik cihazlarda kapsamlý endüstriyel uygulamalara sahip olmasý þaþýrtýcý deðildir. Ortaya çýkan talep, dünya çapýnda sentetik elmas büyümesi üzerine aktif araþtýrma ve geliþtirme programlarýný desteklemiþtir. Bu çalýþmada doðal ve sentetik elmas arasýndaki farkýn laboratuvar koþullarýnda deðerlendirilmesi amaçlanmýþtýr. Araþtýrmada kullanýlan elmaslarýn biri doðal diðer ikisi laboratuvarda üretilen sentetik elmaslardýr. Bu kapsamda üç taþ laboratuvarda incelenmiþtir. Gemolojik analizi tamamlanan taþlarýn FTIR cihazý ile elde edilen bilgileri de fotoðraflanmýþtýr. Elde edilen bulgulara göre Kýzýlötesi spektrum görüntüleri incelendiðinde doðal elmasýn 171,99 nm, 415,13 nm ve 440,5 nm yüksek pik verdiði görülmüþtür. HPHT elmaslarda pik deðerleri 174,9 nm, 428,5 nm, 560,7 nm ve 883,37 nm dir. CVD elmaslarda ise bu deðerler 171,41 nm, 428,4 nm ve 739,3 nm olarak tespit edilmiþtir. Farklýlýðýn sebebi atomlarýn dizilimi, yoðunluðu, elmas kafes yapýsý ve büyüme yapýlarýna baðlý absorbsiyon deðiþkenliðidir. Araþtýrma sonucunda doðal ve sentetik elmaslarýn, laboratuvarda inceleme yapýlmadan basit usulde birbirlerinden ayýrt edilmesi mümkün deðildir. Fiziksel ve kimyasal özellikleri ayný olan doðal ve sentetik elmaslar arasýndaki fark, uygun teknik ve metotlar uygulanarak ileri spektroskobik cihazlar kullanýlarak belirlenmelidir.

Anahtar Kelimeler: Doðal Elmas, CVD Elmas, Sentetik Elmas, HPHT Elmas


EVALUATION OF THE DIFFERENCE BETWEEN NATURAL AND SYNTHETIC DIAMONDS IN LABORATORY CONDITIONS
 
Synthetic diamonds have begun to be used as an alternative to natural diamonds, both in jewelery and in industrial applications. Given the many remarkable properties of synthetic diamonds, it is not surprising that it is not only the jewelery material, but also has extensive industrial applications in thermal management, cutting tools, wear-resistant coatings, optical components and possibly semiconductor electronic devices. The resulting demand has supported active research and development programs on synthetic diamond growth worldwide. In this study, it is aimed to evaluate the difference between natural and synthetic diamonds in laboratory conditions. One of the diamonds used in the research is natural and the other two are synthetic diamonds produced in the laboratory. In this context, three stones were examined in the laboratory. The information obtained by the FTIR device of the stones whose gemological analysis was completed was also photographed. According to the findings, when the infrared spectrum images were examined, it was seen that natural diamond gave high peaks at 171.99 nm, 415.13 nm and 440.5 nm. The peak values in HPHT diamonds are 174.9 nm, 428.5 nm, 560.7 nm and 883.37 nm. In CVD diamonds, these values were determined as 171.41 nm, 428.4 nm and 739.3 nm. The reason for the difference is the arrangement of the atoms, the density, the diamond lattice structure and the absorption variability depending on the growth structures. As a result of the research, it is not possible to distinguish natural and synthetic diamonds from each other in a simple way without examining them in the laboratory. The difference between natural and synthetic diamonds with the same physical and chemical properties should be determined using advanced spectroscopic devices by applying appropriate techniques and methods.

Keywords: Natural Diamond, CVD Diamond, Synthetic Diamond, HPHT Diamond


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