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熔模铸造工艺的发展,要求高质量的新型粘结材料来保证铸型高的强度和热稳定性。在这方面磷酸盐粘结剂有广阔的前景。而熔模铸造生产的新工艺——电泳结壳,在苏联多采用钙铝铬磷酸盐粘结剂。 正磷酸或其不同价盐的水溶液,由于它们只能在150～300℃下不可逆的硬化,在熔模铸造生产中很难利用。实验表明,最能满足熔模铸造工艺要求的是铝铬磷酸盐粘结剂,也就是磷酸及Al和Cr磷酸盐水溶液:Cr_nAl_(4-n)(H_2PO_4)_(12),这里n=1、2、3。铝铬磷酸盐粘结剂可以稳定地保存200昼
The development of investment casting process, require high-quality new bonding material to ensure high strength and thermal stability of the mold. Phosphate binders have a bright future in this area. The investment casting production of new technology - electrophoresis crust, in the Soviet Union to use calcium aluminum chromium phosphate binder. Orthophosphoric acid or an aqueous solution of its different valence salts is difficult to utilize in investment casting because they can only be irreversibly hardened at 150 to 300 ° C. Experiments show that the best to meet the investment casting process requirements are aluminum chromium phosphate binder, which is phosphoric acid and Al and Cr phosphate aqueous solution: Cr_nAl_ (4-n) (H_2PO_4) _ (12), where n = 1 , 2,3. Aluminum chrome phosphate binders can be stored stably for 200 days