A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Preparation method of low-sodium microcrystalline alpha aluminum oxide
The invention particularly relates to a preparation method of low-sodium microcrystalline alpha aluminum oxide, and belongs to the technical field of inorganic non-metallic material synthesis. The method comprises the following steps of: obtaining raw materials including aluminum hydroxide or aluminum oxide; mixing a sodium removing agent and a calcining auxiliary agent with the raw materials, so as to obtain a calcined mixture, and the effective component of the sodium removing agent comprising silicon dioxide; and calcining the calcined mixture, and cooling to obtain the low-sodium microcrystalline alpha aluminum oxide. The prepared low-sodium microcrystalline alpha aluminum oxide has unique excellent performance, high chemical purity, small original grain size, easiness in grinding, good flowability and lower ceramic sintering temperature, and is easy to sinter and shrink to form a compact ceramic body; the whole process avoids adverse effects of foreign substances, such as pollution of a large amount of mineralizing agents to products and the environment; and the adopted sodium removing agent is low in cost and can be repeatedly used.
本发明特别涉及一种低钠微晶α氧化铝的制备方法，属于无机非金属材料合成技术领域，方法包括：获取原料，原料包括氢氧化铝或氧化铝；将脱钠剂和煅烧助剂混合与原料，获得煅烧混合料，脱钠剂的有效成分包括二氧化硅；将煅烧混合料进行煅烧，冷却后获得低钠微晶α氧化铝；制得的低钠微晶α氧化铝具有独特的优良性能，化学纯度高、原晶粒度小、易粉磨、流动性佳，陶瓷烧结温度更低，易于烧结收缩成致密陶瓷体；整个工艺避免了外来物质的不利影响，如大量矿化剂对产品和环境的污染；且采用的脱钠剂成本低，可以多次重复使用。
Preparation method of low-sodium microcrystalline alpha aluminum oxide
The invention particularly relates to a preparation method of low-sodium microcrystalline alpha aluminum oxide, and belongs to the technical field of inorganic non-metallic material synthesis. The method comprises the following steps of: obtaining raw materials including aluminum hydroxide or aluminum oxide; mixing a sodium removing agent and a calcining auxiliary agent with the raw materials, so as to obtain a calcined mixture, and the effective component of the sodium removing agent comprising silicon dioxide; and calcining the calcined mixture, and cooling to obtain the low-sodium microcrystalline alpha aluminum oxide. The prepared low-sodium microcrystalline alpha aluminum oxide has unique excellent performance, high chemical purity, small original grain size, easiness in grinding, good flowability and lower ceramic sintering temperature, and is easy to sinter and shrink to form a compact ceramic body; the whole process avoids adverse effects of foreign substances, such as pollution of a large amount of mineralizing agents to products and the environment; and the adopted sodium removing agent is low in cost and can be repeatedly used.
本发明特别涉及一种低钠微晶α氧化铝的制备方法，属于无机非金属材料合成技术领域，方法包括：获取原料，原料包括氢氧化铝或氧化铝；将脱钠剂和煅烧助剂混合与原料，获得煅烧混合料，脱钠剂的有效成分包括二氧化硅；将煅烧混合料进行煅烧，冷却后获得低钠微晶α氧化铝；制得的低钠微晶α氧化铝具有独特的优良性能，化学纯度高、原晶粒度小、易粉磨、流动性佳，陶瓷烧结温度更低，易于烧结收缩成致密陶瓷体；整个工艺避免了外来物质的不利影响，如大量矿化剂对产品和环境的污染；且采用的脱钠剂成本低，可以多次重复使用。
Preparation method of low-sodium microcrystalline alpha aluminum oxide
一种低钠微晶α氧化铝的制备方法
ZHAO SHANLEI (author) / QI BO (author) / WANG SHAOWU (author) / CHANG SHUAI (author)
2021-04-20
Patent
Electronic Resource
Chinese
Alpha-aluminum oxide for ceramic balls and preparation method of alpha-aluminum oxide
| European Patent Office | 2022
| European Patent Office | 2021
| European Patent Office | 2021
Preparation method of low-sodium aluminum oxide ceramic substrate
| European Patent Office | 2022
Preparation method of alpha-aluminum oxide with edges and corners
| European Patent Office | 2022