If you are looking for a Aluminum Nitride, , & Silicon Nitride & Machinable Ceramics product customized and mold making services in China, please feel free to contact Pintejin ceramic machining Team.Get Instant Quote:[email protected] .

The Properties Of Powder Binder

The Properties Of Powder Binder
The binder used in ceramic injection molding is usually an organic polymer compound, the purpose is to mix with the ceramic powder, increase the fluidity, help the injection molding stage to proceed smoothly, and keep the shape of the green body stable after molding and during degreasing. . When preparing and selecting a binder, the following points need to be considered:
  • The binder itself should have good fluidity. In general, the fluidity of the binder is negatively correlated with the number of molecular weights, and also has a certain relationship with the distribution of molecular weights.
  • The binder has good wettability with the ceramic powder. The addition of the binder can make the powder have a certain fluidity, provided that the two have good affinity and wettability. It can be improved by adding some surfactants (such as stearate, titanate, silane, etc.), the principle is to act as an interface bridge between the powder and the binder, reduce the viscosity when the two are mixed, and improve the fluidity .
  • The diversity of binder components, considering the improvement of the fluidity of injection molding and the subsequent degreasing process, the binder composed of multi-component organic substances is usually used. In the degreasing process, the multi-component binder is divided into steps During the process, the component with the lowest melting point is separated from the green body first, forming tiny air bubbles, which is helpful for the discharge of the following binder components.
  • The binder system should have good thermal conductivity and low thermal expansion coefficient. In addition, the binder should also be non-toxic and harmless, environmentally friendly, non-volatile and non-moisture absorption, and repeated heating performance. invariant characteristics.
Using three organic compounds (PP, SA and PW) as binders, and by calculating the feed viscosity, activation energy and non-Newtonian index, the optimal binder formulation of injection molding AIN powder was finally obtained. Wu Aiping [15] studied the interaction mechanism between the multiple components of the binder, and found that ethylene-vinyl acetate copolymer (EVA) can refine the spherulite structure of polyoxymethylene (POM), improve POM and HDPE ( The compatibility between high-density polyethylene) promotes the uniform dispersion of the two and reduces the size of the dispersed phase.
Pintejin machining ceramic service include : Alumina Ceramic PartsZirconia CeramicSilicon Carbide CeramicCNC Machined Aluminum Nitride CeramicMachinable Ceramic PartsGlass Ceramic,Macor Ceramic,Powder Metallurgy Dies,Ceramic Injection Molding,Ceramic Dry Pressing,Ceramic Extrusion Dies

About the sintering technology of fine ceramics

Pintejin Ceramics Factory is a professional manufacturer of precision ceramics machining, which can provide customized Read more

Injection molding of advanced ceramics

Injection molding is to mix ceramic powder and organic binder, and inject ceramic powder into Read more

Methods and precautions for precision machining of zirconia ceramics

Although the zirconia ceramics we are familiar with have excellent performance and high hardness, it Read more

1050 Centerless Grinding Refiner – Necessary for Zirconia Ceramic Machining

Pintejin Ceramic Factory has recently purchased a 1050 centerless grinding machine, which is an indispensable Read more

Causes of discoloration of alumina ceramics after sintering

Alumina ceramics are made by using alumina as the main raw material, adding 6-30% of Read more

Introduction of silicon nitride ceramics and its application in aerospace

Zirconia ceramics and alumina ceramics are relatively common in the market, and their advantages are Read more

Basic properties and development of zirconia ceramics

Basic performance of zirconia ceramics , is gradually being adopted by decorative ceramics, such as Read more

Analysis on the development status of China’s industrial fine ceramic technology

The development of the fine ceramics industry in China is on the rise, but it Read more