Al Impurity Purification in Quartz Grown by the Hydrothermal Method

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概要

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• Al impurity purification in synthetic quartz grown by the hydrothermal method was studied by atomic absorption spectroscopy. The purification process can be expressed by the equation. Al$_{\text{sq}}{=}\text{a}{\cdot}\exp$ (b$\cdot$Allasca), with Alsq and Allasca representing the respective Al contents in synthetic quartz and lascas used as the nutrient. a and b are constants which depend on the growth condition. Analytical data showed different Al content depending on growth region: it was highest in the $S$-region and lowest in the $Z$-region. Al content in the $Z$-region did not significantly differ (${\sim}10$ ppm), when the nutrient used for crystal growth had an Al content of between 29 ppm and 240 ppm. $S$-regions were not purified when the nutrient with Al content of less than 30 ppm was used. Influence of Al content on crystal morphology in the purification process was discussed.

• 1989-01-20

著者

• IWASAKI Hideo

  Laboratorio de Quartzo, Departamento de Materiais, Faculdade de Engenharia Mecanica, UNICAMP

• Iwasaki Fumiko

  Laboratório de Quartzo, Departamento de Materlais, Faculdade de Engenharia de Campinas, UNICAMP, 13100 Campinas, Sāo Paulo, Brasil

• Suzuki Carlos

  Laboratório de Quartzo, Departamento de Materlais, Faculdade de Engenharia de Campinas, UNICAMP, 13100 Campinas, Sāo Paulo, Brasil

関連論文

• Impurity Content Characterization of Brazilian Quartz Lascas
• Effect of Impurity Segregation on Crystal Morphology of Y-Bar Synthetic Quartz
• Al Impurity Purification in Quartz Grown by the Hydrothermal Method

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