BBT uses the title-caser provided by the embedded CSL processor. This CSL processor title-case
"Design parameters for optimizing the efficiency of thermoelectric
generators utilizing p-type and n-type lead telluride"
"Design Parameters for Optimizing the Efficiency of Thermoelectric Generators Utilizing P-Type and n-Type Lead Telluride"
but "n-Type" is not capitalized like "P-Type".