ブラウン溶融アルミナは、焼成ボーキサイトを電気炉で高温（約 2000 ℃）で徐々に溶融還元して製造される製品です。その化学組成は、主に Al 2 O 3 (94.5-97%) と、微量の TiO 2、 SiO 2、 Fe 2 O 3、 CaO および MgO で構成されています。
ブラウン酸化アルミニウムは、優れた靭性、高い機械的耐性、硬度（モース硬度 9）が特徴です。この材料の微小硬度は約 1900kG/mm 2に達します。比重（密度）は 3.90+/-0.05 g/cm 3です。かさ密度はサイズによって異なり、1.52～1.87 g/cm 3です。熱伝導率は比較的高く、熱膨張率は低くなっています。電気に関しては絶縁体です。
| ブラウン電融アルミナ JIS 360# | |
| 化学組成 | パーセンテージ |
| アル2O3 | ≥94.0% |
| Fe2O3 | ≤0.5% |
| 20時 | ≤0.30% |
| SiO2 | ≤1.50% |
| 二酸化チタン | 1.5～3.8% |
| 高い | ≤0.30% |
| 物理化学指数 | |
| かさ密度 | 1.53-1.99g/cm3 |
| 粒度密度 | 3.90グラム/cm3 |
| モールス硬度 | 9 |
ブラウン溶融酸化アルミニウム粉末は、 結合研磨工具やラッピングおよび研磨工程における一般的な研磨用途に特化して製造された完璧な材料です。酸化アルミニウムはダイヤモンド、炭化ホウ素、炭化ケイ素よりも硬度と研磨能力が低いですが、処理コストが重要な場合に鉄系材料の研削、強靭で硬い材料の仕上げ、セラミック部品の充填に広く使用されています。
| アイテム | D0（1） | D3(えーと) | D50(1個) | D94(えーと) |
| ＃240 | ＜127 | ＜103 | 57.0±3.0 | ＞40 |
| ＃280 | ＜112 | ＜87 | 48.0±3.0 | ＞33 |
| ＃320 | ＜98 | ＜74 | 40.0±2.5 | ＞27 |
| ＃360 | ＜86 | ＜66 | 35.0±2.0 | ＞23 |
| ＃400 | ＜75 | ＜58 | 30.0±2.0 | ＞20 |
| ＃500 | ＜63 | ＜50 | 25.0±2.0 | ＞16 |
| ＃600 | ＜53 | ＜41 | 20.0±1.5 | ＞13 |
| ＃700 | ＜45 | ＜37 | 17.0±1.5 | ＞11 |
| ＃800 | ＜38 | ＜31 | 14.0±1.0 | ＞9.0 |
| ＃1000 | ＜32 | ＜27 | 11.5.±1.0 | ＞7.0 |
| ＃1200 | ＜27 | ＜23 | 9.5±0.8 | ＞5.5 |
| ＃1500 | ＜23 | ＜20 | 8.0±0.6 | ＞4.5 |
| ＃2000 | ＜19 | ＜17 | 6.7±0.6 | ＞4.0 |
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