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In this paper, a natural innoxious polymer is used to consolidate alumina ceramic suspensions. The gelling behavior of sodium alginate is studied for the process. Chelator is employed here, which combines the free calcium ions in the chelate complex; therefore, the reaction between calcium ions and sodium alginate is avoided in the stage before casting. By adding hexanedioic acid, the calcium ions...
A novel gel-casting process by sodium alginate gelation is presented. Solidified agent and chelator are added into sodium alginate solution simultaneously, thus the gelation between calcium ions and sodium alginate is avoided in this stage due to the chelate complex formed from the chelator and solidified agent (calcium salt). By adding hexanedioic acid, free calcium ions are released from the chelate...
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