This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Neiman, R. Articles by Sarma, A. C. Search for Related Content PubMed PubMed Citation Articles by Neiman, R. Articles by Sarma, A. C. Pubmed/NCBI databases Compound via MeSH Substance via MeSH Hazardous Substances DB MAGNESIUM COMPOUNDS MAGNESIUM OXIDE Social Bookmarking                         What's this?

Setting and Thermal Reactions of Phosphate Investments

Whip-Mix Corporation, Inc., 361 Farmington Avenue, Louisville, Kentucky 40217

Atul C. Sarma

Whip-Mix Corporation, Inc., 361 Farmington Avenue, Louisville, Kentucky 40217

The setting reactions and thermal degradation of the phosphate binders are interpreted from the DTA and X-ray diffraction data. Setting takes place through complex formation of (NH₄Mg PO₄.6H₂O)_n, excess reactants, and water. Dehydration and thermal reactions lead to a sequence of reactions forming (NH₄MgPO₄.H₂O) _n, (Mg2P2 O₇)_n', Mg₂P ₂O₇, and Mg₃(PO₄)₂.

REFERENCES

• Gilham-Dayton, P.A.: The Phosphate Bonding of Refractory Materials, Brit Cer Trans 62:897, 1963.
• Moore, T.E. and Watts, C.H.: Investment Materials, U.S. Patent 2,479, 504; 1949.
• Allan, F.C. and Asgar, K.: Reaction of Cobalt-Chromium Alloys with Investment, J Dent Res 45:1516, 1966.[Free Full Text]
• Sawada, T.: On Setting Mechanism and Hygroscopic Expansion of Phosphate-bonded Investment Mixed with Colloidal Silica Solution, J Jap Res Soc Dent Mat & Appl 32:6, 1974.
• Mabie, C.P.: Petrographic Study of the Refractory Performance of High-fusing Dental Alloy Investments. I. High-fired Phosphate-bonded Investments, J Dent Res 52:96, 1973.
• Paulik, J. and Paulik, F.: Simultaneous Thermogravimetric and Thermo-gas-titrimetric Investigations Carried out Under Quasi-isothermal and Quasi-isobaric Conditions by Means of Derivatograph, Thermal Analysis. I. Bizas, Ed., Vol. 3, Proc. 4th ICTA, Budapest: Akademiai Diado, 1975, 789.
• Macarovici, D. and Polverejan, D.: Thermal Synthesis of Some Inorganic Double Phosphates, Thermal Analysis. Ed. I. Buzas, Vol. 1, Proc. 4th ICTA, Budapest: Akademiai Kiado, 1974, p. 681.
• Elliot, J.H.: Crystalline Silicates and Phosphates as Ionic Polymers, in Ionic Polymers. Ed. L. Holliday, New York: John Wiley & Sons, 1975, pp. 300-360.
• Ray, N.H.: Inorganic Glasses as Ionic Polymers, in Ionic Polymers. Ed. L. Holliday, New York: John Wiley & Sons, 1975, pp. 363-404.
• Wilson, A.D.; Kent, B.E.; and Lewis, B.G.: Zinc Phosphate Cements: Chemical Study of in vitro Durability, J Dent Res 49:1049, 1970.[Abstract/Free Full Text]
• Servais, G.E. and Cartz, I.: Structure of Zinc Phosphate Dental Cement, J Dent Res 50:613,1971.[Abstract/Free Full Text]

Journal of Dental Research, Vol. 59, No. 9, 1478-1485 (1980)
DOI: 10.1177/00220345800590090401


CiteULike    Complore    Connotea    Del.icio.us    Digg    Reddit    Technorati    Twitter    What's this?

This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Citing Articles via Scopus Google Scholar Articles by Neiman, R. Articles by Sarma, A. C. Search for Related Content PubMed PubMed Citation Articles by Neiman, R. Articles by Sarma, A. C. Pubmed/NCBI databases Compound via MeSH Substance via MeSH Hazardous Substances DB MAGNESIUM COMPOUNDS MAGNESIUM OXIDE Social Bookmarking                         What's this?