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你对低熔点玻璃粉有多少了解?-------选自中国粉体网

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发表时间:2016-06-07 16:02

[导读] “低温熔融玻璃粉”是一种深度开发的无机焊接材料,是国内甚至国外都比较前沿的一种新型材料。目前已经应用到某些新兴领域,但应用前景远远不止当前遇见的,还有待材料领域的人才们去发掘和拓展。

[takeaway]"Low temperature melting glass powder" is a kind of inorganic welding material which is developed in depth. It is a new kind of material at the frontier of domestic and even foreign countries. It has been applied to some emerging fields, but the application prospect is far more than meets the present. It is still waiting for talents in the material field to explore and expand.

中国粉体网讯  低熔点玻璃粉为稳定的结晶硅铝氧化物为主;传统玻璃粉多为钠盐或钙盐类,含有重金属,是一种在常温常压下相对稳定,但硬度低,需约1000摄氏度以上才熔融,同时材料与酸、碱等物质都会起不同程度的反应。所以对特殊工艺的材料而言,选用低熔点玻璃粉作为透明、白色或功能填充是较为稳妥的。

The low melting point glass powder is the main content of the stable crystalline silicon aluminum oxide. More than the traditional glass powder for sodium salt or calcium salt, containing heavy metals, is a relatively stable under atmospheric pressure, but the hardness is low, to about 1000 degrees Celsius above to melt, but material with acid, alkali and other substances to different degrees of reaction will be. Therefore, it is prudent to choose low melting point glass powder as transparent, white or functional filler for materials of special craft.


什么是低熔点玻璃粉?

What is low melting point glass powder?




低熔点玻璃粉是由天然高纯度非金属矿:高岭土、石灰石、硅灰石、硅石、霞石、钾长石、钠长石、硼盐及环保助熔材料等,经高温熔融、冷却后制得的晶态块粒物,经破碎、高纯水处理、干燥、球磨(或气流磨)、风选等多道工艺加工而成的微粉。


低熔点玻璃粉的物理特性


低温熔融玻璃粉是一种无毒、无味、无污染的无机非金属材料,其物理特性主要有三高、三耐和;两低。


三高:高附着力性、高热传导性、高热稳定性


三耐:耐酸碱性、耐磨性、耐黄变性


两低:低的热膨胀系数、低温熔融等


低熔点玻璃粉的应用


当温度达到低温熔融玻璃粉的熔点时,玻璃粉会熔融二次成膜,形成一层化学性稳定、机械强度高、致密的无机膜层;被广泛用于高温涂料、高温油漆、高温油墨、阻燃塑料、阻燃橡胶、电子封装、电子灌封、封接材料、烧结材料及国防等领域。

Low melting point glass powder is made from natural high purity, non-metallic mineral kaolin, limestone, silica, wollastonite, nepheline, potash feldspar, sodium feldspar, boron salt and environmental protection helps the molten material, after high temperature melting, cooling of crystalline grain material, through high pure water treatment, drying, crushing, ball mill (or jet mill), multi-channel process such as winnowing of micro powder.

The physical properties of low-melting glass powder

Low temperature melting glass powder is a non-toxic, odorless and pollution-free inorganic non-metallic material, and its physical characteristics mainly include three high and three tolerance. Two low.

High adhesion, high thermal conductivity and high thermal stability

Tolerance: acid resistance, abrasion resistance and yellowing degeneration

Low thermal expansion coefficient and low temperature melting

Application of low melting point glass powder

When the temperature reaches the melting point of molten glass powder, the glass powder melts the secondary forming film, forming a layer of chemical stability, high mechanical strength and compact inorganic film layer. It is widely used in high temperature paint, high temperature paint, high temperature ink, flame retardant plastics, flame retardant rubber, electron encapsulation, electron filling, sealing material, sintering material and national defense.




低熔点玻璃粉使用的常见问题


1、低熔点玻璃粉在高温涂料行业中粒径选择


低温熔融玻璃粉的细度:一般为500目或325目全通过。平均粒径在5~13微米。从理论上说,低温熔融玻璃粉粒径越小,越有利于熔融结合。但实际在涂料的生产、丝网印、喷涂及刷涂工艺中,低温熔融玻璃粉越细,越容易结团,不容易分散,体系分散不均,必须提高水或溶剂载体的用量;但如果粒径太大,在涂料分散及涂上过程中易产生沉降,涂上时浸渍性变差,加之重力作用,粉体在体系中的分布也会不均匀。所以从工艺角度来讲,选择一个合理的粒径范畴,是一个很重要的参数。


2、低熔点玻璃粉的使用安全


低温熔融玻璃粉使用安全应严格按照使用非金属粉体材料有关国家标准及规范进行操作,但因低温熔融玻璃粉较细和较轻,严禁高空抛洒材料,防止细粉飞扬,使用时最好岗位职员佩戴防尘设备及装备。


结语:


“低温熔融玻璃粉”是一种深度开发的无机焊接材料,是国内甚至国外都比较前沿的一种新型材料。不同应用领域可能有不同的名称,例如:高温溶剂、无机溶剂、无机油墨、陶瓷化剂、封接油墨、无机焊接剂等。低温熔融玻璃粉作为新型材料,已经应用到某些新兴领域,但应用前景远远不止当前遇见的,还有待材料领域的人才们去发掘和拓展。

Common problems with low melting point glass powder

1. Low melting point glass powder in the high temperature coating industry particle size selection

Fineness of molten glass powder in low temperature: generally used for 500 eyes or 325 eyes. The average particle size is 5 ~ 13 microns. In theory, the smaller the particle size of the melting glass powder, the more favorable the fusion is. But in the production of paint, silk screen printing, spray and brush coating technology, low temperature molten glass powder is fine, the easier the cluster, it is not easy to disperse, system scattered unevenly, must increase the amount of water or solvent carrier; However, if the particle size is too large, the dispersion of the coating and the process of coating are easy to be deposited, and the impregnation of the powder will be poor, and the distribution of powder in the system will be uneven. So from the process point of view, choose a reasonable particle size category, is a very important parameter.

2. The use of low melting point glass powder is safe

Low temperature molten glass powder use safety non-metallic powder material should be used strictly in accordance with relevant national standards and norms of operation, but because of the low temperature molten glass powder is fine and lighter, it is strictly prohibited to high altitude spilled material, to prevent the powder float in the sky, when using the best post staff wear dust equipment and equipment.

Conclusion:

"Low temperature melting glass powder" is a kind of inorganic welding material which is developed in depth. It is a new kind of material at the frontier of domestic and even foreign countries. Different application fields may have different names, such as high temperature solvents, inorganic solvents, inorganic inks, ceramics, sealing inks, inorganic solders, etc. As a new material, low-temperature melting glass powder has been applied to some emerging fields, but the application prospect is far more than meets the present, and the talent in the field of materials to explore and expand.



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