Crystalline salt monomers for stable phosphate glasses
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IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C01B-015/16
C01B-025/26
C03C-003/00
출원번호
US-0644270
(1975-12-24)
발명자
/ 주소
Ropp Richard C. (Warren NJ)
출원인 / 주소
Allied Chemical Corporation (Morris Township NJ 02)
인용정보
피인용 횟수 :
5인용 특허 :
0
초록▼
Precursors for the preparation of phosphate glasses are provided. Controlled preparation of the precursors in precise stoichiometric proportions enable the preparation of glasses which are stable and possess superior optical properties of an order similar to optical glasses. Suitable precursors with
Precursors for the preparation of phosphate glasses are provided. Controlled preparation of the precursors in precise stoichiometric proportions enable the preparation of glasses which are stable and possess superior optical properties of an order similar to optical glasses. Suitable precursors within the contemplation of the invention are those having the formula: M(H2PO4)n WHEREIN M is a metal ion selected from the group consisting of Al, Zn, Cd, Fe, Sn, Mn, Pb, Ni, Co, Ga, and In and the alkaline earth metals Be, Mg, Ca, Sr and Ba and wherein n has a value of 2 or 3 depending on whether M is a divalent or trivalent ion. Mixtures of these compounds may be employed, the admixture being made prior to melting stoichiometric equivalent precursor mixture. In addition, any combination of precursors containing divalent and/or trivalent cations may be selected.
대표청구항▼
A method of preparing a water soluble monobasic phosphate glass precursor having the formula: M(H2PO4)n wherein M is a metal ion selected from the group consisting of aluminum, zinc, cadmium, iron, tin, manganese, lead, nickel, cobalt, gallium, indium and the alkaline earth metals beryllium, magnesi
A method of preparing a water soluble monobasic phosphate glass precursor having the formula: M(H2PO4)n wherein M is a metal ion selected from the group consisting of aluminum, zinc, cadmium, iron, tin, manganese, lead, nickel, cobalt, gallium, indium and the alkaline earth metals beryllium, magnesium, calcium, strontium and barium, and wherein n has a value of 2 or 3 depending on whether M is a divalent or trivalent ion, in essentially pure monobasic form which comprises dissolving a compound supplying said metal ion M in a controlled execess of phosphoric acid to form a stoichiometrically proportioned solution, adding a precipitating agent, effective to precipitate soluble transition metal impurities other than the selected metal ion removing formed insolubles to produce an essentially pure solution, forming a crystal product from the resulting purified solution by evaporation, and washing said crystal product substantially free of phosphoric acid to yield a stoichiometrically proportioned crystalline phosphate salt.
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이 특허를 인용한 특허 (5)
Chai Bruce H. (Bridgewater NJ) Buehler Ernest (Chatham NJ) Flynn John J. (Millington NJ), Hydrothermal process and apparatus for synthesizing crystalline powders.
Pierce Robert A. ; Smith James R. ; Ramsey William G. ; Cicero-Herman Connie A. ; Bickford Dennis F., Method for acid oxidation of radioactive, hazardous, and mixed organic waste materials.
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