https://web.njit.edu/~dave/Dry-Coating-Review.pdf

Synthesis of engineered particulates with tailored properties using dry particle coating

Morphology control of Ni–YSZ cermet anode for lower temperature operation of SOFCs

Preparation of TiO2/Nano-metal composite particles and their applications in dye-sensitized solar cells

Dry particle coating using magnetically assisted impaction coating: modification of surface properties and optimization of system and operating parameters

Drug-lactose binding aspects in adhesive mixtures: controlling performance in dry powder inhaler formulations by altering lactose carrier surfaces.

This paper reviews a new method for surface modification to cover particle surface with fine particles mechanically in a dry phase by making use of comminution techniques.First, the relation of comminution process with surface modification technology is discussed, and the advanced machines developed in Japan to treat core particles surface with fine particles based on grinding principles are introduced. Then, the details of the composite process of core/fine particles with these machines are explained.In the second section, the effects of the controlling factors on the composite process such as mechanical actions, treating temperature and atmosphere are discussed.The third section deals with the conditions of combinations of core/fine particles acceptable to this method, and it is demonstrated that this method has a great feasibility to fabricate composite particles by the combination of various kinds of core/fine particles. The scale-up of these machnines is explained in the fourth section, and a typical example is introduced.The last section summarizes the applications of the composite particles fabricated by this method to create various kinds of new materials, which include the application for surface modification technology. The applications of this method are shown to expand for other types of processing such as rounding particles and mixing different kinds of powder materials precisely. Furthermore, it is also explained that this method can fabricate composite particles inside which different kinds of components are dispersed.

Applications of comminution techniques for the surface modification of powder materials

Recently, composite particles covered with different kinds of fine particles have been fabricated by several types mechanical methods in a dry phase. However, the quantitative analysis of the composite process has not yet been conducted systematically.In this paper, a mechanical processing method called MECHANOFUSION was used to investigate the composite process with glass beads and titanium dioxide fine particles. As the first trial, the ratio of fine particles fixed onto core particles and the BET surface area of the composite particles obtatined were measured with processing time.As a result, the composite process was described by the following two steps: The first is an adhering step for fine particles onto core particles surface, and the second is a compacting step for fine particle layers.Furthermore, it was found that the BET surface area of the processed powder was correlated with the energy consumption per weight of material in the apparatus.

Analysis of the Powder Composite Process by a Mechanical Method

Recently, composite particles covered with different kinds of fine particles have been fabricated using various mechanical methods in a dry phase. However, the quantitative analysis of the composite process has not yet been conducted systematically. In this paper, a mechanical processing method called MECHANOFUSION was used to investigate the composite process of glass beads and titanium dioxide fine particles. As a first trial, the ratio of fine particles fixed onto core particles and the BET specific surface area of the processed particles were measured as a function of the processing time. Consequently, the composite process was described as the following two steps: The first is the adhering step whereby fine particles adhere to the core particles' surface, and the second is the compacting step of the fine particle layers. Furthermore, it was found that the BET specific surface area of the processed powder was correlated with the energy consumption per weight of material in the apparatus.

Analysis of the Powder Composite Process by a Mechanical Method [Translated]†

In this paper, a mechanical processing method called MECHANOFUSION was used to investigate the effect of the chamber revolution and core particle size on the composite process. Glass beads were used as core particles, and titanium dioxide was selected as fine particles. The weight fraction of the fine particles fixed onto the core particles surface was measured to characterize the composite process.As a result, the composite process was described by the following two patterns related to the chamber revolution: Under a critical revolution, fine particles gradually adhered to core particles during the processing time, and at a higher revolution, some portions of the fine particles were detached from the core particles surface after a certain time. Furthermore, the critical revolution was inversely proportional to the core particle size.These results were explained qualitatively from the analysis of the BET surface area and the SEM pictures of the processed particles.

https://www.jstage.jst.go.jp/article/sptj1978/30/1/30_1_32/_pdf

Akira Kondo

Papers

Applications of comminution techniques for the surface modification of powder materials

Analysis of the Powder Composite Process by a Mechanical Method

Analysis of the Powder Composite Process by a Mechanical Method [Translated]†

The Effect of the Operational Condition and Core Particle Size on the Powder Composite Process by a Mechanical Method

Effect of mechanical stirring of YBaCuO mixed powder during heat treatment on superconductive properties