Lilac ceramic pigments based on Ba_0.5Sr_0.5Zn_2−xNi_xSi₂O₇ solid solutions

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• 作者：Christian Thieme^a ; ^{christian.thieme@uni-jena.de" class="auth_mail" title="E-mail the corresponding author} ; Tina Waurischk^a ; ^{tinawaurischk@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Changgui Lin^a ; ^b ; ^{linchanggui@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; Christian Rü ; ssel^a ; ^{ccr@uni-jena.d" class="auth_mail" title="E-mail the corresponding author}
• 关键词：XRD ; Pigments ; Color space ; Absorption spectra ; Nickel ; Coordination
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：15 August 2016
• 年：2016
• 卷：42
• 期：11
• 页码：13035-13040
• 全文大小：1545 K

文摘

Lilac pigments were prepared within the solid solution series Ba_0.5Sr_0.5Zn_2−xNi_xSi₂O₇ with 0.1≤x≤0.5 from the corresponding oxides and carbonates via solid-state reactions. Depending on the composition, the solid solutions exhibit the crystal structure of the low-temperature and the high-temperature phases of BaZn₂Si₂O₇. This structural change leads to a change in the optical spectra, i.e. the coloration of the ceramic powders. The different colors are attributed to the variation of the coordination sites of Ni²⁺. In the case of samples with the structure of HT-BaZn₂Si₂O₇, Ni²⁺-ions are incorporated into tetrahedrally coordinated sites. Spectra of samples with the crystal structure of LT-BaZn₂Si₂O₇ are attributed to a mixture of Ni²⁺ in tetrahedral coordination but also to distorted sites with higher coordination numbers.