6148
The formation and uniform distribution of Y2O3 particles formed in the Zr matrix were identified , and the stability of the particles was confirmed up to 1000 °C .
 concept or principle: distribution; concept or principle: particles; material: Zr; machanical property: stability; concept or principle: particles
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: distribution, particles, Zr, stability, particles 
Answer:
 concept or principle: distribution; concept or principle: particles; material: Zr; machanical property: stability; concept or principle: particles