4937
DAD is unique because it uses kinetic energy rather than thermal energy for densification , and the result is a nearly theoretically dense , nano-crystalline ceramic .
 concept or principle: thermal energy; manufacturing process: densification; material: ceramic
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
 Entities: thermal energy, densification, ceramic 
Answer:
 concept or principle: thermal energy; manufacturing process: densification; material: ceramic