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| Search goal | Operator | Examples |
| Required terms | Use a plus (+) sign before each required term | +automobile +windshields +glass
+partially +stabilized +zirconia +ceria |
| Excluded terms | Use a minus (-) sign prefix before each required term and enclose term in " ". | +rotary +kilns -"cement"
+partially +stabilized +zirconia -“yttria” |
| Wildcards | Use an asterisk anywhere after the first letter in the term | refractor* will return results for refractories, refractory, refractoriness |
| Exact phrases | Enclose in double quotes | “basic refractories” |
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Example searches
-”thermal barrier coatings” +zirconia
-”blast furnace” +refractor*
+monolithic +refractor* +steel