US3917490A — Method of grinding solder glasses

Claim 1

Independent Claim 14 words

A PROCESS FOR GRINDING ALKALI METAL BORATE GLASSES OF HIGH BORATE CONTENTS WHICH COMPRISES::

Claim 2

Dependent Claim 14 words

A PROCESS FOR GRINDING ALKALI METAL BORATE GLASSES OF HIGH BORATE CONTENTS WHICH COMPRISES::

Claim 3

Dependent Claim 48 words

PROVIDING PARTICLES OF AN ALKALI METAL BORATE SOLDER GLASS HAVING EFFECTIVE DIAMETES OF AT LEAST 2 MICRONS AND CONSISTING ESSENTIALLY OF BORON TRIOXIDE AND SODIUM OXIDE, POTASSIUM OXIDE OR A MIXTURE THEREOF THE CONTENT OF BORON TRIOXIDE IN SAID GLASS BEING ABOUT 90 TO ABOUT 98 WT. %,

Claim 4

Dependent Claim 48 words

PROVIDING PARTICLES OF AN ALKALI METAL BORATE SOLDER GLASS HAVING EFFECTIVE DIAMETES OF AT LEAST 2 MICRONS AND CONSISTING ESSENTIALLY OF BORON TRIOXIDE AND SODIUM OXIDE, POTASSIUM OXIDE OR A MIXTURE THEREOF THE CONTENT OF BORON TRIOXIDE IN SAID GLASS BEING ABOUT 90 TO ABOUT 98 WT. %,

Claim 5

Dependent Claim 98 words

GRINDING SAID PARTICLES WHILE CONTACTING THEM WITH AN ALIPHATIC SAMINE, AT A TEMPERATURE AT WHICH THE VAPOR PRESSURE OF THE AMINE IS AT LEAST 1MM HG BUT LESS THAN THE ALTERNATION TEMPERATURE OF THE AMINE OR THE OFTENING POINT OF THE GLASS, WHICHEVERIS LOWER, UNTIL AT LEAST SOME OF SAID PARTICLES HAVE BEEN CONVERTED TO FRAGMENTS THEREOF WHICH HAVE EFFECTIVE DIMETERS OF LESS THAN ONE MICRON AND ARE COATED WITH AT LEAST A MONOMLECULAR LAYER OF THE AMINE, SAID AMINE CONTAINING AT LEAST ONE CHAIN OF AT LEAST 12 CARBONS AND A TOTAL OF UP TO 42 CARBONS,

Claim 6

Dependent Claim 98 words

GRINDING SAID PARTICLES WHILE CONTACTING THEM WITH AN ALIPHATIC SAMINE, AT A TEMPERATURE AT WHICH THE VAPOR PRESSURE OF THE AMINE IS AT LEAST 1MM HG BUT LESS THAN THE ALTERNATION TEMPERATURE OF THE AMINE OR THE OFTENING POINT OF THE GLASS, WHICHEVERIS LOWER, UNTIL AT LEAST SOME OF SAID PARTICLES HAVE BEEN CONVERTED TO FRAGMENTS THEREOF WHICH HAVE EFFECTIVE DIMETERS OF LESS THAN ONE MICRON AND ARE COATED WITH AT LEAST A MONOMLECULAR LAYER OF THE AMINE, SAID AMINE CONTAINING AT LEAST ONE CHAIN OF AT LEAST 12 CARBONS AND A TOTAL OF UP TO 42 CARBONS,

Claim 7

Dependent Claim 100 words

grinding said particles while contacting them with an aliphatic amine, at a temperature at which the vapor pressure of the amine is at least 1 mm Hg but less than the alteration temperature of the amine or the softening point of the glass, whichever is lower, until at least some of said particles have been converted to fragments thereof which have effective diameters of less than one micron and are coated with at least a monomolecular layer of the amine, said amine containing at least one chain of at least 12 carbons and a total of up to 42 carbons.

Claim 8

Dependent Claim 100 words

grinding said particles while contacting them with an aliphatic amine, at a temperature at which the vapor pressure of the amine is at least 1 mm Hg but less than the alteration temperature of the amine or the softening point of the glass, whichever is lower, until at least some of said particles have been converted to fragments thereof which have effective diameters of less than one micron and are coated with at least a monomolecular layer of the amine, said amine containing at least one chain of at least 12 carbons and a total of up to 42 carbons.

Claim 9

Dependent Claim 33 words

The process of claim 1 wherein the grinding is continued until the solids present constitute a powder including at least 20 volume percent of particles having effective diameters of less than one micron.

Claim 10

Dependent Claim 92 words

The process of claim 2 comprising the additional steps of: a. mixing from about 40 to about 60 parts by weight of said powder with about 60 to about 40 parts of -200 to +325 mesh particles of a glass miscible therewith upon fusion and from about 7 to about 14 parts by weight of a volatilizeable, non-aqueous liquid suspending vehicle to form a paste; b. shaping said paste, c. curing said paste by heating it and volatilizing said liquid vehicle, d. fusing the residual solids, thereby forming a unitary glass body.

Claim 11

Dependent Claim 21 words

The process of claim 3 in which said -200 to +325 mesh particles consist of the same glass as said powder.

Claim 12

Dependent Claim 55 words

THE POCESS OF CLAIM 3 IN WHICH SAID PASTE IS SHAPED BY SO DISPOSING IT THAT THE UNITARY GLASS BODY FORMED UPON SAID CURING AND FUSING CONSISTUTES A TUBE-SHEET MEMBER ADAPTED TO BE INCORPORATED IN A HIGH TEMPERATURE BATTERY CELL IN WHICH THE ELECTROLYTE/SEPARATOR CONSISTS OF A GLASS TO WHICH SAID SOLDER GLASS WILL BOND.

Claim 13

Dependent Claim 20 words

The process of claim 5 including, as an additional step, incorporating said tube-sheet member in a high temperature battery cell.

Claim 14

Dependent Claim 23 words

The process of claim 1 wherein the solder glass consists essentially of B2O3 and Na2O and contains about 94 wt. % of B2O3.

Claim 15

Dependent Claim 77 words

The process of claim 1 in which said amine has the formula R1R2R3N, wherein R1 is an alkyl or alkenyl group containing a chain of 15 to 20 carbons, R2 and R3 independently are H or are alkyl or alkenyl groups and thE total number of carbons is from 15 to 24 and the weight of said amine present in the grinding mix is from 0.5 to 2.5 % of the weight of the glass particles present.

Claim 16

Dependent Claim 27 words

The process of claim 1 in which the grinding temperature is greater than 80*C. but less than the boiling point of the amine at 760 mm Hg.

Claim 17

Dependent Claim 29 words

The process of claim 7 in which R1 is an alkyl or alkenyl group of 16, 17 or 18 carbons and R2 and R3 independently are H or methyl.

Claim 18

Dependent Claim 42 words

The process of claim 9 in which the weight of the amine employed is from about 1 to about 2% of the weight of the glass particles present in the grinding mix and the amine is hexadecyl amine or dimethyl octadecyl amine.

Claim 19

Dependent Claim 12 words

A high temperature battery cell produced by the process of claim 6.

Claim 20

Dependent Claim 12 words

An alkali metal/sulfur battery cell produced by the process of claim 6.

Claim 21

Dependent Claim 22 words

A high temperature battery cell of claim 12 in which the electrolyte/separator is in the form of a plurality of hollow fibers.

Claim 22

Dependent Claim 12 words

A cell of claim 14 which is an alkali metal/sulfur battery cell.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-11-03	1979-05-05	1979-11-04	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-11-03	1983-05-05	1983-11-04	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-11-03	1987-05-05	1987-11-04	$7700.00	Window Closed / Lapsed

Method of grinding solder glasses

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