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The authors report that the addition of dopants to the ceramic powder decreased the to phase transformation of TCP sintered at 1250 Additionally , the density increased leading to a 250 % increase in compressive strength , when compared to pure TCP scaffolds .
 material: dopants; material: ceramic powder; concept or principle: phase; manufacturing process: sintered; machanical property: density; machanical property: compressive strength; biomedical: TCP scaffolds
Please list all entity words in the text that fit the category.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} 
Answer:
 material: dopants; material: ceramic powder; concept or principle: phase; manufacturing process: sintered; machanical property: density; machanical property: compressive strength; biomedical: TCP scaffolds