Required terms

Use a plus sign prefix before each required term

Examples

+automobile +windshields +glass

+partially +stabilized +zirconia +ceria

Excluded terms

Use a minus sign prefix before each excluded term

Examples

+rotary +kilns –cement

+stabilized +zirconia –yttria

Wildcards

Use an asterisk anywhere after the first letter in the term

Example

refractor* will return results for refractories, refractory, refractoriness

Exact phrases

Enclose in double quotes

Example

"basic refractories"

Example searches

+"thermal barrier coatings" +zirconia

+"blast furnace" +refractor*

+monolithic +refractor* +steel