Method for producing halides
A method for producing a halide includes heat-treating a mixed material in an inert gas atmosphere, the mixed material being a mixture of M 2 O 3 , NH 4 X, and LiZ. The M includes at least one element selected from the group consisting of Y, a lanthanoid, and Sc. The X is at least one element selected from the group consisting of CI, Br, I, and F. The Z is at least one element selected from the group consisting of CI, Br, I, and F.
1. A method for producing a halide, the method comprising steps of:
weighing M 2 O 3 , NH 4 X and LiZ according to a desired molar ratio;
mixing M 2 O 3 , NH 4 X and LiZ to form a mixed material, the mixed material being a mixture of M 2 O 3 , NH 4 X, and LiZ, and
heat-treating the mixed material in an inert gas atmosphere,
wherein the M includes at least one element selected from the group consisting of Y, a lanthanoid, and Sc,
wherein the X is at least one element selected from the group consisting of Cl, Br, I, and F, and
wherein the Z is at least one element selected from the group consisting of Cl, Br, I, and F.
2. The method for producing a halide according to claim 1 , wherein, in the step of heat-treating, the mixed material is heat-treated at a temperature of greater than or equal to 200° C. and less than or equal to 650° C.
3. The method for producing a halide according to claim 1 , wherein, in the step of heat-treating, the mixed material is heat-treated for a time period of greater than or equal to 1 hour and less than or equal to 72 hours.
4. The method for producing a halide according to claim 1 ,
wherein the step of heat-treating includes first heat-treating and second heat-treating conducted subsequent to the first heat-treating,
wherein, in the step of first heat-treating, the mixed material is heat-treated at a first heat-treatment temperature T1,
wherein, in the step of second heat-treating, the mixed material is heat-treated at a second heat-treatment temperature T2, and
wherein T1≤T2 is satisfied.
5. The method for producing a halide according to claim 4 ,
wherein the X includes Cl,
wherein 200° C.≤T1≤330° C. is satisfied, and
wherein 330° C.≤T2≤650° C. is satisfied.
6. The method for producing a halide according to claim 4 ,
wherein the X includes Br,
wherein 200° C.≤T1≤390° C. is satisfied, and
wherein 390° C.≤T2≤650° C. is satisfied.
7. The method for producing a halide according to claim 4 ,
wherein the X includes I,
wherein 200° C.≤T1≤550° C. is satisfied, and
wherein 550° C.≤T2≤650° C. is satisfied.
8. The method for producing a halide according to claim 4 ,
wherein the X includes F,
wherein 200° C.≤T1≤230° C. is satisfied, and
wherein 230° C.≤T2≤650° C. is satisfied.
9. The method for producing a halide according to claim 4 ,
wherein, in the step of first heat-treating, the mixed material is heat-treated for a first heat-treatment time P 1 ,
wherein, in the step of second heat-treating, the mixed material is heat-treated for a second heat-treatment time P 2 , and
wherein P 1 >P 2 is satisfied.
10. The method for producing a halide according to claim 9 ,
wherein the first heat-treatment time P 1 is greater than or equal to 1 hour and less than or equal to 72 hours.
11. The method for producing a halide according to claim 9 ,
wherein the second heat-treatment time P 2 is greater than or equal to 1 hour and less than or equal to 72 hours.
12. The method for producing a halide according to claim 1 ,
wherein the M is at least one element selected from the group consisting of Y, Sm, and Gd.
13. The method for producing a halide according to claim 1 ,
wherein the X is at least one element selected from the group consisting of Cl, Br, and I, and
wherein the Z is at least one element selected from the group consisting of Cl, Br, and I.
14. The method for producing a halide according to claim 1 , wherein the mixing M 2 O 3 , NH 4 X, and LiZ includes pulverizing M 2 O 3 , NH 4 X, and LiZ.
15. The method for producing a halide according to claim 1 , wherein the mixing M 2 O 3 , NH 4 X, and LiZ includes mixing powders of each of M 2 O 3 , NH 4 X, and LiZ.
16. The method for producing a halide according to claim 1 , wherein the mixture includes only M 2 O 3 , NH 4 X, and LiZ.
17. The method for producing a halide according to claim 13 , wherein X is different from Z.
18. A method for producing a halide, the method comprising steps of:
heat-treating a mixed material in an inert gas atmosphere, the mixed material being a mixture of M 2 O 3 , NH 4 X, and LiZ,
wherein the M includes at least one element selected from the group consisting of Y, a lanthanoid, and Sc,
wherein the X includes F,
wherein the Z is at least one element selected from the group consisting of Cl, Br, I, and F,
wherein the step of heat-treating includes first heat-treating and second heat-treating conducted subsequent to the first heat-treating,
wherein, in the step of first heat-treating, the mixed material is heat-treated at a first heat-treatment temperature T1,
wherein, in the step of second heat-treating, the mixed material is heat-treated at a second heat-treatment temperature T2,
wherein T1≤T2 is satisfied,
wherein 200° C.≤T1≤230° C. is satisfied, and
wherein 230° C.≤T2≤650° C. is satisfied.