Masters Theses


"The glass formation region of the Ho2O3∙Al2O3∙SiO2 system was determined to extend from 9 to 30 mole percent Ho2O3. The chemical durability of these glasses was examined in physiological solutions to determine the feasibility of their use for in-vivo radiotherapeutic applications. The dissolution rates of bulk glass specimens were barely measurable in distilled water at 37 or 70 °C, but increased with temperature and with the substitution of Ho2O3 for Al2O3 or SiO2 in 0.1 N HCl. Both glass surface analysis by EDS and solution analysis by ICP showed that little if any holmium leached from bulk glass specimens or microspheres into the distilled water or saline solution at 37 or 70 °C. EDS and ICP also indicate that the predominant corrosion mechanism in 0.1N HCl is dependent on glass composition and temperature. The density, refractive index, thermal expansion, and Vickers hardness increased with Ho2O3 content. The structure of the glasses was examined by FTIR"--Abstract, page iv.


Day, D. E.

Committee Member(s)

Moore, Robert E., 1930-2003
Brown, Roger F.


Materials Science and Engineering

Degree Name

M.S. in Ceramic Engineering


University of Missouri--Rolla

Publication Date

Fall 1992


x, 58 pages

Note about bibliography

Includes bibliographical references (pages 27-28).


© 1992 Daniel Steven McIntyre, All rights reserved.

Document Type

Thesis - Restricted Access

File Type




Thesis Number

T 6509

Print OCLC #


Electronic OCLC #


Link to Catalog Record

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