128
Leucite has been widely used as a constituent of dental ceramics to modify the coefficient of thermal expansion , which is very important when the ceramic is to be fused or baked onto metal .
 material: Leucite; material: as; application: dental; material: ceramics; machanical property: coefficient of thermal expansion; material: ceramic; material: be; material: metal
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: Leucite; material: as; application: dental; material: ceramics; machanical property: coefficient of thermal expansion; material: ceramic; material: be; material: metal