Monodisperse, submicron, spherical, and porous clusters of zinc sulfide (ZnS) nanocrystallites were used as a host material, into which gallium phosphide (GaP) was impregnated. A solution containing a phosphinogallane, (t-Bu)[subscript]2GaP(t-Bu)[subscript]2, and a vapor mixture of GaI and P[subscript]4 were used as precursors for GaP;Powders obtained via organometallic precursors were nanocomposite powders with an average crystallite size of 12 nm and maintained the initial powder morphology of ZnS after heat treatment at 800°C for 24 hours. After hot isostatic pressing, relative densities greater than 95% and ultra-fine microstructures with average grain sizes ranging 16-31 nm were achieved. Nanocomposites showed significant increase in hardness, as high as ~100%, compared to pure ZnS. Powders obtained using vapor phase precursors were mainly solid solutions between ZnS and GaP. The powders were densified to over 98% relative densities by hot isostatic pressing. Both hardness and fracture toughness increased with increasing GaP content.
","abstract_html":"<p>Monodisperse, submicron, spherical, and porous clusters of zinc sulfide (ZnS) nanocrystallites were used as a host material, into which gallium phosphide (GaP) was impregnated. A solution containing a phosphinogallane, (t-Bu)[subscript]2GaP(t-Bu)[subscript]2, and a vapor mixture of GaI and P[subscript]4 were used as precursors for GaP;Powders obtained via organometallic precursors were nanocomposite powders with an average crystallite size of 12 nm and maintained the initial powder morphology of ZnS after heat treatment at 800°C for 24 hours. After hot isostatic pressing, relative densities greater than 95% and ultra-fine microstructures with average grain sizes ranging 16-31 nm were achieved. Nanocomposites showed significant increase in hardness, as high as ~100%, compared to pure ZnS. Powders obtained using vapor phase precursors were mainly solid solutions between ZnS and GaP. The powders were densified to over 98% relative densities by hot isostatic pressing. Both hardness and fracture toughness increased with increasing GaP content.</p>","abstract_has_math":false,"creators":["Han, Yong"],"institution":null,"degree_name":"Doctor of Philosophy","degree_level":"dissertation","degree_discipline":null,"degree_department":"Department of Materials Science and Engineering","school":null,"contributors":[],"advisors":["Mufit Akinc"],"committee_chairs":[],"committee_members":[],"year":1994,"date_issued":"1994","date_published":"1994","updated_at":"2026-07-24T02:37:16Z","subjects":[],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier.doi","label":"DOI","values":["https://doi.org/10.31274/rtd-180813-11762"],"render_values":[{"text":"https://doi.org/10.31274/rtd-180813-11762","href":"https://doi.org/10.31274/rtd-180813-11762","code":true}]},{"key":"dc:identifier","label":"Identifier","values":["archive/lib.dr.iastate.edu/rtd/10476/"],"render_values":[{"text":"archive/lib.dr.iastate.edu/rtd/10476/","href":null,"code":true}]}]},"links":{"outbound_url":"https://dr.lib.iastate.edu/handle/20.500.12876/63626","outbound_label":"Repository record","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Mufit Akinc"]},{"key":"dc:contributor.department","label":"Department","values":["Department of Materials Science and Engineering"]},{"key":"dc:creator","label":"Author","values":["Han, Yong"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2018-08-23T07:17:43.000"]},{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2020-06-30T07:05:08Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2020-06-30T07:05:08Z"]},{"key":"dc:date.issued","label":"Date","values":["1994"]},{"key":"dc:type","label":"Dc Type","values":["dissertation"]},{"key":"thesis:degree_level","label":"Degree Level","values":["dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Doctor of Philosophy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["archive/lib.dr.iastate.edu/rtd/10476/"]},{"key":"dc:identifier.doi","label":"DOI","values":["https://doi.org/10.31274/rtd-180813-11762"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://dr.lib.iastate.edu/handle/20.500.12876/63626"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Monodisperse, submicron, spherical, and porous clusters of zinc sulfide (ZnS) nanocrystallites were used as a host material, into which gallium phosphide (GaP) was impregnated. A solution containing a phosphinogallane, (t-Bu)[subscript]2GaP(t-Bu)[subscript]2, and a vapor mixture of GaI and P[subscript]4 were used as precursors for GaP;Powders obtained via organometallic precursors were nanocomposite powders with an average crystallite size of 12 nm and maintained the initial powder morphology of ZnS after heat treatment at 800°C for 24 hours. After hot isostatic pressing, relative densities greater than 95% and ultra-fine microstructures with average grain sizes ranging 16-31 nm were achieved. Nanocomposites showed significant increase in hardness, as high as ~100%, compared to pure ZnS. Powders obtained using vapor phase precursors were mainly solid solutions between ZnS and GaP. The powders were densified to over 98% relative densities by hot isostatic pressing. Both hardness and fracture toughness increased with increasing GaP content.
"]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Processing and characterization of zinc sulfide based materials"]}]}],"canonical_facts":{"dc:contributor.advisor":["Mufit Akinc"],"dc:contributor.department":["Department of Materials Science and Engineering"],"dc:creator":["Han, Yong"],"dc:date":["2018-08-23T07:17:43.000"],"dc:date.accessioned":["2020-06-30T07:05:08Z"],"dc:date.available":["2020-06-30T07:05:08Z"],"dc:date.issued":["1994"],"dc:description.abstract":["Monodisperse, submicron, spherical, and porous clusters of zinc sulfide (ZnS) nanocrystallites were used as a host material, into which gallium phosphide (GaP) was impregnated. A solution containing a phosphinogallane, (t-Bu)[subscript]2GaP(t-Bu)[subscript]2, and a vapor mixture of GaI and P[subscript]4 were used as precursors for GaP;Powders obtained via organometallic precursors were nanocomposite powders with an average crystallite size of 12 nm and maintained the initial powder morphology of ZnS after heat treatment at 800°C for 24 hours. After hot isostatic pressing, relative densities greater than 95% and ultra-fine microstructures with average grain sizes ranging 16-31 nm were achieved. Nanocomposites showed significant increase in hardness, as high as ~100%, compared to pure ZnS. Powders obtained using vapor phase precursors were mainly solid solutions between ZnS and GaP. The powders were densified to over 98% relative densities by hot isostatic pressing. Both hardness and fracture toughness increased with increasing GaP content.
"],"dc:format.mimetype":["application/pdf"],"dc:identifier":["archive/lib.dr.iastate.edu/rtd/10476/"],"dc:identifier.doi":["https://doi.org/10.31274/rtd-180813-11762"],"dc:identifier.uri":["https://dr.lib.iastate.edu/handle/20.500.12876/63626"],"dc:language.iso":["en"],"dc:title":["Processing and characterization of zinc sulfide based materials"],"dc:type":["dissertation"],"thesis:degree_level":["dissertation"],"thesis:degree_name":["Doctor of Philosophy"]},"updated_at":"2026-07-24T02:37:16Z"}