Preparation of Acicular Magnesium Pyroborate from Spray-dried Mixture
スポンサーリンク
概要
- 論文の詳細を見る
We studied the preparation method of acicular magnesium pyroborate (Mg<SUB>2</SUB>B<SUB>2</SUB>O<SUB>5</SUB>), especially in relation to the prevention of formation of agglomerates, which generally form by heating mortar-ground mixture of MgO-H<SUB>3</SUB>BO<SUB>3</SUB>-KCl.<BR>Spray-drying of slurry, which contained reaction components and flux, gave a starting material with Mg and B in amorphous state and Mg and K almost uniformly distributed. The slurry was made by adding hot solution of H<SUB>3</SUB>BO<SUB>3</SUB> and KCl to suspended solution of Mg (OH) <SUB>2</SUB> with 2 : 3 : 7 mole ratio of Mg : B : KCl.<BR>Heat treatment of the spray-dried mixture at 750°C gave small acicular crystals of Mg<SUB>2</SUB>B<SUB>2</SUB>O<SUB>5</SUB> less than ca. 1μm in length without by-product such as MgO and MgB<SUB>4</SUB>O<SUB>7</SUB>. The product obtained by heating the mixture at 850°C for 3hrs contained only acicular Mg<SUB>2</SUB>B<SUB>2</SUB>O<SUB>5</SUB> crystals ca. 5-15μm long and ca. 0.5μm thick, and did not contain agglomerates.
- 無機マテリアル学会の論文
無機マテリアル学会 | 論文
- 建築の凹凸仕上げ模様の計測方法
- 半水セッコウの凝結時間および硬化体の強さに及ぼす二水セッコウ添加の影響
- セッコウ硬化体の強さに及ぼす半水セッコウスラリーへの超音波照射の影響
- アルミニウム置換型トバモライトの層間を利用した赤色発光する蛍光体の合成と蛍光特性
- 超音波照射を用いて合成した炭酸カルシウムの特徴