| Raw materials | Specifications | Molecular formula | Molecular weight (g/mol) | Purity | Vendor |
| Phosphoric acid | AR 500 ml | H3PO4 | 98.0 | 85.0% | Guanzhou Rikewei Chemical Co., Ltd |
| Boehmite |
| Al2O3・2H2O | 138.0 | 95% | Zibo Yinghe Chemicals Co., Ltd |
| Triethylamine | AR 500 ml | (C2H5)3N | 101.19 | ≥99.0% | Shanghai Ruizheng Chemicals. Co., Ltd |
| Niobium hydroxide | AR 500 g | Nb(OH)5 | 177.94 | 99.9% | Guanzhou Non-Ferrous Metals Co., Ltd |
| Ferric nitrate | AR 500 g | Fe(NO3)3・9H2O | 404.00 | 98.5% | Xiamen Ditai Chemicals Co., Ltd |
| Ethyl orthosilicate | AR 500 ml | (C2H5O)4Si | 208.33 | 40.45% | Qingdao Huatuo Chemicals Co., Ltd |