Lining type container used for precious metal crucible and preparation method thereof
A precious metal and crucible technology, which is applied to the field of lined container and its preparation, can solve the problems that the crucible lining cannot be produced in batches, increase the amount of crucible erosion, and the operation time is long, and achieves simple production, high equipment use efficiency, The effect of short production cycle
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Embodiment 1
[0019] A lined container for a precious metal crucible and a preparation method thereof. Described preparation method is:
[0020] Step 1, according to the molar ratio of boric acid powder: lithium carbonate powder is 4: 1, boric acid powder and lithium carbonate powder are mixed uniformly, obtain mixed powder; Then to described mixed powder spray pure water, the pure water of spraying is described mixed powder. 0.1~0.8wt% of the powder, stirred and mixed to obtain a mixture; the mixture was left to stand at 10~20°C until the mixture was 84~88wt% of the mixture before standing, and a lithium tetraborate semi-dry material was obtained .
[0021] Step 2: molding the lithium tetraborate semi-dry material to obtain a lined container blank of the crucible.
[0022] Step 3: Put the lined container blank of the crucible in an oven, dry at 105°C for 2-3 hours, and sinter at 700-780°C for 2-3 hours; cool to obtain the inner lining for the precious metal crucible container.
Embodiment 2
[0024] A lined container for a precious metal crucible and a preparation method thereof. Described preparation method is:
[0025] Step 1, according to the molar ratio of boric acid powder: lithium carbonate powder is 4: 1, boric acid powder and lithium carbonate powder are mixed uniformly, obtain mixed powder; Then to described mixed powder spray pure water, the pure water of spraying is described mixed powder. 0.5~1.5wt% of the powder, stirred and mixed to obtain a mixture; the mixture was left to stand at 15~25°C until the mixture was 83~87wt% of the mixture before standing, and a lithium tetraborate semi-dry material was obtained .
[0026] Step 2: molding the lithium tetraborate semi-dry material to obtain a lined container blank of the crucible.
[0027] Step 3: Place the lined container blank of the crucible in an oven, dry at 105°C for 2-3 hours, and sinter at 750-820°C for 1.5-2.5 hours; cool to obtain the inner lining for the precious metal crucible container.
Embodiment 3
[0029] A lined container for a precious metal crucible and a preparation method thereof. Described preparation method is:
[0030] Step 1, according to the molar ratio of boric acid powder: lithium carbonate powder is 4: 1, boric acid powder and lithium carbonate powder are mixed uniformly, obtain mixed powder; Then to described mixed powder spray pure water, the pure water of spraying is described mixed powder. 1.2-2wt% of the powder, stirred and mixed to obtain a mixture; the mixture was left to stand at 20-40°C until the mixture was 82-86wt% of the mixture before standing, and a lithium tetraborate semi-dry material was obtained.
[0031] Step 2: molding the lithium tetraborate semi-dry material to obtain a lined container blank of the crucible.
[0032] Step 3: Place the lined container blank of the crucible in an oven, dry at 105°C for 2-3 hours, and sinter at 800-850°C for 1-2 hours; cool to obtain the inner lining for the precious metal crucible container.
[0033]...
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