Grain template

Morphosynthesis of complex inorganic forms using pollen grain templates. Chemical Communications, 2784-2785. 

Fig. 2. Schematic of the synthesis of nanostructured metals and alloys in varying grain sizes supported on hollow, highly oriented protein templates (Behrens, Dinjus, and Unger, 1999 Behrens et al., 2000).

Ferroelectric ceramics (such as barium titanate, lead zircanate titanate) Sensors and actuators, electronic memory, optical applications Tape casting, sputtering, pressing, templated grain growth Improved dielectric and piezoelectric properties... 

Figure 7.31 Templated grain growth process (a) templates (black platelets) are randomly oriented in powder (b) during consolidation, templates achieve a preferred orientation (c) larger templates grow at the expense of smaller particles during sintering (d) after sintering, the majority of the final part can be composed of grains with the preferred orientation or texture.

Kwon, S. Sabolsky, E. M. Control of ceramic microstmeture by templated grain growth. 

In an investigation of PER synthesized without a template (66), it was shown that an acid treatment causes the removal of non-shape-selective acidic sites located in pores larger than the zeolitic pores or on the external surfaces of the ferrierite grains (66). Consequently, isobutylene selectivity... 

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